1 a36 access scaffold - ribble valley a36 access scaffold ... any damage due to the scaffold use,...

7328 Stydd Lane, Almshouses

Fabric Repair Specification

Buttress Fuller Alsop Williams

31-33 Princess Street

Manchester

M2 4BF

1 A36 ACCESS SCAFFOLD

1.1 SCAFFOLDING

1.2 DESIGN:

The design of all scaffolding will be the responsibility of the Contractor and is to be

in accordance with the recommendations of BS 5973: 1990 "Code of Practice for

access and Working Scaffold and special scaffold staircases in Steel" or as updated.

As the work involved is to a listed building, the scaffold should essentially be

regarded as independent of the existing structure and designed accordingly. Where

tying to the existing structure cannot be avoided the positions and type of any such

ties shall be submitted and agreed with the CA prior to the erection of any scaffold.

No additional costs will be granted after the acceptance of any tender where this

requirement has been overlooked.

Compliance with the various Acts and regulations listed in BS 5973 is the

responsibility of the Contractor.

Compliance with all aspects of Health and Safety during erection, using and

dismantling is the responsibility of the Contractor.

The design of the scaffold is to take account of the requirements of all trades which

will require access, use as a working platform or storage. No claims will be

entertained for additional scaffold or for amending scaffold already erected to suit

the requirements of trades contained within the specification.

The design of the scaffolding will take into account any specific requirements of the

consulting structural engineer appointed to assess the proposals.

1.3 PROPOSALS:

The Contractor is to submit his proposals for the scaffold on or before the date for

possession and not less than 7 days before commencement of the scaffold.

The Contractor’s proposals are to include clear drawings and structural calculations

in duplicate, sufficient to prove the stability of the proposed temporary structures in

accordance with BS 5973 : 1990.

These drawings will clearly indicate positions where any scaffold is to be tied back to

the fabric of the building.

No scaffolding shall be commenced on site until the Contractors proposals have

been submitted and agreed with the Architect / Structural Engineer. Agreement of

the Contractor’s proposals does not relieve the Contractor of his responsibilities to

ensure full compliance of all requirements.

1.4 PROGRAMME:

Prior to commencement of any scaffolding the Contractor shall submit a programme

indicating the commencement date, completion date, and period for dismantling for

each area of scaffolding.

Scaffold may be required for inspection purposes prior to confirmation of scope of

the work and the Contractor is to indicate this period on his programme and ensure

that his proposals are submitted early enough to ensure that this period is not

compromised.

The programme is to take account of all the requirements of the sub-contractors

who require the use of the scaffold.





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1.5 ERECTION REQUIREMENTS:

All scaffold tubing and fittings are to be galvanised and in good condition and free

from corrosion. Rusty components will not be accepted.

No steel component (including capped tubes) is to be in contact with the fabric of

the building except where specific approval has been given.

Where it is necessary to brace the scaffold from the masonry then timber packing of

a minimum thickness of 20mm is to be placed between the scaffolding and the

masonry.

No scaffolding shall rest on any roof coverings unless agreed in writing prior to

commencement.

The ends of ALL scaffold tubes are to be protected with plastic caps, which are to be

fitted prior to delivery to site. Where it is necessary to cut scaffold tubes during

erection the end is to be re-capped immediately.

Scaffold tubes are not to encroach within 200mm of the surface of the building

except where required for support or stabilising. This is to prevent accidental

damage to the fabric by minor movement of the scaffold.

Unless unavoidable it will not be permitted to brace scaffold through window or door

openings. Should this prove necessary the existing finishes are to be protected with

20mm thick timber packers both internally and externally. The opening is to be

boarded up with access only for the scaffold tubes.

1.6 SUPERVISION:

The Contractor is to exercise particular care in supervising the erection and

dismantling of the scaffold to ensure that no damage occurs to the fabric of the

building.

It should be noted that in many instances damage to the historic fabric cannot easily

be rectified. Any damage due to the scaffold use, erection or dismantling will be

rectified at the Contractor’s expense.

1.7 SECURITY:

All external scaffolding shall be designed and erected so as to prevent unauthorised

access by sheeting using heras fencing to a minimum height of 5.0 metres at the

contractor’s discretion. It should be noted that all of the properties will be occupied

by the tenants and as such will require 24 hour access. Heras fencing has been

specified to allow for natural daylight into each of the occupied dwellings.

Access to the scaffold is to be via a lockable door through the barrier described

above.

Ladders to the lower lift are to be removed at night.

Any areas that may be accessible from adjoining structures, roofs, etc., are to be

similarly protected by boarding or by other approved means.

1.8 PROTECTION:

All surfaces at ground level are to be suitably protected to prevent the scaffold

damaging existing external finishes.

Ensure any architectural features or areas prone to damage are suitably protected.





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M2 4BF

Where protection measures are considered inadequate the Contractor will, at his

own expense, provide additional protection as directed by the Architect.

1.9 DISMANTLING:

Ensure all necessary care is taken to ensure that no damage occurs to the fabric of

the building.

Scaffold tubes should be carefully lowered to ground level and not thrown or

dropped.

No dismantled components shall be left on site outside working hours.

1.10 TEMPORARY PROTECTION AGAINST THE ELEMENTS:

A temporary roof is not to be provided as part of the works however particular

attention must be given to providing safe public access to all residential properties.

Any damage arising to the building fabric from the failure of temporary sheeting will

be made good at the contractors expense.

Sheeting for side walls shall be reinforced translucent sheets which are self

extinguishing and flame retardant (e.g. Monaflex). Details of any alternative

proposals shall be submitted for approval with the tender.

All sheeting shall be adequately secured against wind uplift etc.

All sheeting shall be checked by a competent person once a week and a signed

record kept on site. Any defects are to be rectified immediately.

All areas are to be maintained as watertight as possible at all times.

1.11 CERTIFICATES

Copies of all handover certificates issued by the scaffolding sub-contractor shall be

forwarded to the Architect upon receipt by the Main Contractor.

Copies of all test certificates for hoists shall be forwarded to the Architect on receipt

by the Main Contractor.

No scaffolding shall be used unless handover certificates and test certificates have

been issued.





Manchester

M2 4BF

2 C41 REPAIRING/RENOVATING/CONSERVING MASONRY

2.1 MASONRY CLEANING

2.2 GENERAL:

The cleaning of masonry on any part of this project shall only be undertaken by

experienced operatives who have regularly been engaged in, or specialise in

restorative cleaning of external and internal masonry and shall produce references of

such activity with the tender return. The sub-contractor shall be a member of the

Stone Federation's surface cleaning contractors.

The operatives shall be fully conversant with the method of cleaning specified and

have had previous experience and knowledge of the system. The operatives shall

have attended training sessions on the use of all items of equipment or chemicals

contained in the specification.

The extent of masonry to be cleaned is identified on the elevational drawings and is

to include all cills, ledges, mullions, cornices and mouldings within the designated

area.

The primary purpose is to remove heavy soiling, bird fouling and carbon deposits.

The process may also remove some algae staining.

Unless instructed otherwise the cleaning process is to be executed prior to carrying

out any masonry repairs.

Prior to carrying out the works the areas to be cleaned are to be examined by the

Architect and Contractor to confirm the exact cleaning system type and areas for

cleaning of the masonry / stone.

2.3 PROTECTION:

All surfaces not being cleaned shall be fully protected to ensure that no accidental

over spray of cleaning occurs.

Protection of surfaces shall include the following

a) Windows and doors are to be covered in 500 gauge polythene protection

securely taped at all edges with 2” waterproof tape.

b) Painted surfaces not being redecorated shall be covered in 500 gauge polythene

protection securely taped at all edges with 2” waterproof tape.

Protection shall be inspected at the start of each working day to ensure its integrity.

Any defects noted shall be rectified by the Contractor prior to commencement of

work.

No cleaning operations shall commence until all protection is in place.

No protection shall be removed until cleaning operations have been completed and

have been inspected and approved by the Architect. Protection is to remain in place

until "snagging" items have been completed and approved.





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2.4 TYPES OF CLEANING SYSTEMS

TORC cleaning system is a process that uses a swirling vortex comprising a mixture

of low air pressure, a little water and a safe, inert, abrasive powder/material. This

mixture is then directed onto the area requiring cleaning through a vortex, which is a

safe and gentle yet very effective even on delicate or friable surfaces. The system

may be used for the safe removal of carbon pollutants from stone, brick, terracotta,

ceramic tiles, glass, concrete etc. it is also suitable for the cleaning of oxidation and

sulphation from bronze, brass, copper, aluminium etc. Refer to attached method

statement prior to carrying out the works produced by Stone Health.

DOFF cleaning system uses steam as the cleaning agent. A normal water supply is

taken into the high-pressure pump where the pressure is increased to the required

level before it enters the hot-box. The temperature is increased up to 150◦C if

necessary before it passes to the heat resistant nozzle where special jets direct the

steam onto the surface to be cleaned. The DOFF system will effectively remove paint,

bitumen, oil and grease, chewing gum, algae etc from virtually all surfaces including

brick, stone, concrete, tiles, terracotta, wood, stucco. Refer to attached method

statement prior to carrying out the works produced by Stone Health.

Please obtain quotes from Stone Health, however the choice of cleaning contractor

is at the contractor’s discretion and Architects approval.

2.5 GENERAL: EXTERNAL POINTING OF SANDSTONE ASHLAR MASONRY AND BRICKWORK

Contractor's attention is drawn to the fact that in some cases the joints are large and

the stone is friable in localised areas. The repointing work will demand a great deal

of care and attention on site to the preparation, filling and pointing. Any additional

replacement stone is to be agreed with the Architect following raking out and prior

to repointing commencing.

2.6 SAMPLE PANELS:

The tenderer is to allow for carrying out one test panel approximately 1 metre

square under the direction of the Architect, using the methods described below.

Work to the rest of the stone / brickwork should not commence until the test panel

has been approved by the Architect.

The location of the test panel is to be agreed with the Architect prior to

commencement.

Tenderer is to allow for several sample mixes using different coloured fine aggregate

to obtain a satisfactory colour for the pointing.

2.7 PREPARATION:

All joints are to be raked out to a depth of 25mm using a fine toothed saw blade or

hooked knife. Extreme care is to be taken to avoid damage to the arris of the brick /

stone.

Under no circumstances will the use of mechanical tools be permitted (disc cutters

etc.)





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M2 4BF

Joints are to be flushed out using clean water until the water runs clear. Where very

fine joints are encountered a large hypodermic syringe shall be used to flush the

joints.

The tenderer is to allow for the insertion of a backing 'rod'. This item is to be

confirmed during the preparation of the sample area.

The backing rod is to be fine waxed string or string coated with petroleum jelly,

stretched and twisted several times prior to inserting to the back of the prepared

joint with a knife blade.

2.8 FILLING AND POINTING OF SANDSTONE MASONRY:

Filling is to be by the taping and pointing method.

The mortar is to be introduced into damp joints and compressed with a purpose

made pointing iron/key. Mortar is to be thoroughly compacted into the joints.

The mortar is to be pointed firmly into the joints and finished with a very slight

recess (not more than 1mm deep).

Clean off any surplus or spread of mortar with a clean pointing trowel.

The joint is to be hit back with a churn brush when semi-set to complete the

compaction and expose the aggregate.

2.9 FILLING AND POINTING OF BRICKWORK:

The mortar is to be introduced into damp joints and compressed with a

purpose made pointing iron/key and fully compacted flush with the arises.




2.10 PROGRESS:

The works are to be co-ordinated such that preparation is carried out to agreed

areas and made available for inspection by the Architect/Employer's Representative.

The Contractor is to give at least 48 hours notice for inspection.

No filling of joints is to proceed until preparation has been inspected and approved

by Architect.

Filling and pointing is to be carried out in small areas such that all operations in one

area can be completed within the working day with due notice being paid to any

potential adverse weather conditions.

The work is to be kept clean from mortar spillage at all times.

When pointing commences only area which can be successfully completed during

the normal working day are to be attempted giving due regard to the weather

conditions/forecast.

Completed areas are to be protected until cured.

2.11 CLEANING:

Clean down all areas on completion using clean water and bristle brushes only.

Acid cleaners are not to be used.





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M2 4BF

REPLACEMENTS AND INSERTIONS

2.12 BRICK:

Bricks shall be bricks selected to match existing in size, texture and colour. Samples

shall be provided by the Contractor for approval and no final work shall be

commenced on the repairs until the sample has been approved in writing.

Bricks shall be free from the presence of fungal attack, visible salts, paint, limewash

or other substances.

Resin

All resins shall be approved in writing before use. The Contractor is to supply full

technical details of proposed resins with his tender or where the work is additional to

the contract, not less than 2 weeks before intended use.

Water

Water for the works shall be clean and fresh without pollutants. Where existing

water supply is available within the building this may only be used with the

Employers permission. In other cases a lockable stand pipe shall be erected to the

approval of the local water authority.

Mortar

Hydraulic lime mortar as specification Z21.

2.13 INSPECTION AND DRAWINGS:

Access

In any project involving masonry repairs the tender drawings will have been prepared

from visual inspection, usually without the benefit of access scaffold. The Contractor

is to allow in his programme a period of 2 weeks for confirmation of the scope of the

works to each area after the completion of the access scaffold to that area of work.

The Contractor is encouraged to be represented during the inspection in order that

he may contribute in any discussion regarding alternative methods of repair.

Notice

The Contractor is to give 48 hours notice to the Architect of the completion of the

access scaffold to each area.

Confirmation

Confirmation of the scope of the work will be the issue of revised drawings and

confirmed by an Architects Instruction following completion of the inspection from

the access scaffold.





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M2 4BF

Scaffold

The Contractor shall ensure that all access scaffold is complete and in accordance

with the specification and that handover certificates have been issued before inviting

inspection. Inspection will not be carried out if the scaffold is not in accordance with

the specification.

Drawings

In most cases all working drawings will be provided by the Architect. Where

fabrication drawings are required to be prepared by the Contractor for specialist

areas the Contractor shall submit duplicate copies of the drawings at least two

weeks before confirmation of the order for the stonework is required. No cutting of

the stonework shall commence until the drawings have been approved in writing by

the Architect.

Programme

The Contractor shall provide a programme of work based on the tender drawings

before commencement of work on site. This programme shall indicate separately

the erection sequence for access scaffold inspection period, order period and works

on site for reach area of work.

2.14 PROTECTION, STORAGE AND CLEANING:

Protection of Work Area

Where large areas of masonry repairs are to be undertaken the scaffold/work area is

to be fully protected using a translucent non combustible sheet such as Monaflex

fixed to the outside of the scaffold/hoarding.

Protection of the Fabric

Where appropriate, any existing windows are to be protected with ply or particle

board in the areas adjacent to any area of work. Other features identified on the

drawings are to be protected from damage.

Where scaffold is erected internal fittings shall be adequately protected.

Storage

Stone should be stored in stacks on battens protected from moisture and freezing.

Adequate care is to be taken to ensure that no damage occurs to the stone during

storage or handling.

Lifting

The Contractor shall provide adequate lifting gear to unload and handle stones into

position.

Protection of Finished Work

Cover arrises, moulds, carving and other finished work to protect from accidental

damage. Protection is to be maintained until completion of all work in that vicinity.





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M2 4BF

Cleaning of Work

Keep facework clean and free from staining at all times.

Clean off and rub down all stonework as scaffold is taken down.

2.15 CUTTING OUT OF DEFECTIVE BRICKWORK:

The areas to be cut out shall be marked on site and approved/confirmed by the

Architect prior to commencement of cutting out.

The brickwork shall be carefully cut out with chisels taking extreme care not to

damage the arrises of adjoining brickwork which may be being retained.

Any damage to adjoining areas will be made good at the contractors expense.

The area is to be cleared of any mortar, debris etc and any defect in the backing

masonry is to be reported to the Architect.

Where large areas of brick or block are to be removed the opening is to be propped

with timber props ensuring that no damage is caused to adjoining brickwork.

2.16 INSERTING NEW BRICKWORK:

The recess is to be thoroughly cleaned out and the adjoining brickwork is to be

moistened to prevent the mortar "snatching".

New bricks are to be bedded on a bed (and backing where solid walls are involved) of

in lime mortar as specification Z21 mortar.

New brickwork is to be installed flush with the face of the building and ensuring that

the bed joints and perpend joints are maintained consistent with the existing bricks.

The mortar is to be kept back 25mm from the face to facilitate later pointing.

Where brickwork is being inserted into worn areas of brickwork the new brick is to be

set such that the face is in the line of the original face of the brickwork.

Where individual bricks are being replaced ties are not necessary.

Where larger areas of brickwork are to be removed then ties will be required to be

located at centres as follows:

a) 900 mm centres horizontally and 450mm centres vertically with rows

staggered.

b) 225 centres vertically within 300mm of any opening.

c) At closer centres if specified by the Structural Engineer or indicated on the

drawings.

© Not to be reprinted, copied or reproduced in full or in part, without the prior express permission of Stonehealth Limited. © Page 1 of 3 TORC Methstat 05/07/04

Method Statement & Recommendations for Cleaning Mineralic Substrates Using the TORC Cleaning System The name TORC refers to the Stonehealth ‘Low Pressure Swirling Vortex’ system, the earlier version of which was called JOS. For the purposes of specification the result can be regarded as comparable. Both the TORC and JOS nozzles operate with water, however only the TORC can be operated without if required.

1. The areas to be cleaned will be examined by the Supervising Officer and those of historic or

delicate nature will be noted for additional precautions. 2. It should be normal practice before commencement of the cleaning operation that one or

more sample areas are evaluated. Due merit should be given to the following; a) Areas should be representative of the substrate, soling and detail of the main works. b) Test panels should be positioned discreetly. c) Location of the test areas must be recorded and protected from further alteration. d) The parameters by which the result is obtained must be recorded. e) An acceptable test area should be retained as a control panel for the main works. f) Measures adopted as a result of the tests must be attainable and controllable in the main

works. 3. The cleaning of the building surface should be carried out by a capable operator, who has

received instruction from Stonehealth Limited, into the correct use of the TORC cleaning system. Stonehealth Limited maintains a record of the induction of each operator, together with subsequent monitoring information.

4. If the Test Supervisor is not familiar with the TORC system, they should seek such

information from Stonehealth Limited as to be correctly identify the principle components. This is to prevent non-approved contractors making fraudulent claim to the TORC system with consequential damage to building fabric.

5. Consideration must be given to all Health & Safety matters. These are;

a) Protective Clothing & Equipment Items specific to the use of this equipment; Eye protection (visor), ear protection (defenders / plugs), water-resistant clothing (skin to be covered), respiratory equipment (minimum shall be a disposable mask type FFP2, progressing through replacement cartridge type). If using the equipment dry or semi-dry then an air-fed helmet will be appropriate. If removing toxic or bio-hazard coatings, take this into account. Gloves (leather, cloth or rubber).

b) Electrical Safety In the UK and Eire, the TORC system is normally supplied in 110 volts. Electrical ancillaries should incorporate abrasion resistant yellow arctic cable and BS4343 plugs and connectors. Power demand is 2.25 Kw.

c) Location of TORC Equipment Equipment should be placed in a location easily accessible to the operator or their assistant. The pressure pot must prevent the ingress of water and debris. The same applies to stock of unused abrasive. Do not cover the air cooler or pump when in operation. Keep the equipment clean by placing away from the immediate vicinity of cleaning.


d) Storage and Use of Fuel If using a diesel compressor, it may be necessary to store light gas oil (red diesel) or motor vehicle diesel on site. Ensure this is located to prevent accidental or malicious spillage. Make use of containment / bunding as required by law. Avoid contact with skin, soil and vegetation.

e) Education of Personnel Whilst personnel working in the vicinity need not be inducted into the working of the system they should be made aware of the potential hazards – compressed air, dust, noise, high pressure water. It is prohibited to use compressed air against the person e.g. to aid removal of dust. A nominated person adjacent, other than the operator, should be aware of how to safely shut down the system in circumstances unforeseen.

f) Fire Fighting Equipment The TORC equipment includes electrical items. A diesel engine compressor may present a liquid fire hazard.

6. The material to be used in the TORC system must be that supplied or approved by

Stonehealth Limited. These are currently as follows:-

i Calcite ‘mos’ 0.05 To 0.3 mm 3 Hardness ii Calcium Carbonate 0.05 To 0.4 mm 3 Hardness iii Dolomite 80 0.04 To 0.08 mm 4 Hardness iv Dolomite ‘mos’ 0.05 To 0.3 mm 4 Hardness v Unil 80 (Micro-Fein) 0.04 To 0.08 mm 6.5 - 7 Hardness vi Unil 180 (Ultra-Fein) 0.04 To 0.18 mm 6.5 - 7 Hardness vii Unil 250 (Fein) 0.1 To 0.5 mm 6.5 - 7 Hardness viii Unil 500 0.1 To 0.8 mm 6.5 - 7 Hardness

In general terms preference should be given to the granulates of lower hardness (i to iv) to minimise the risk of abrasion to the substrate and wear to the nozzle. However the removal of heavy soiling or paint may be best achieved by swift use of a harder granulate (v - viii) rather than prolonged use of a softer one (i to iv).

Granulates must be stored prior to use in a clean and dry environment.

Whilst these granulates are appropriate for almost all requirements other materials may be available for special applications – Please consult Stonehealth Limited.

7. If working adjacent to a watercourse, prevent contamination by solid or other residues. In

preference, use natural abrasives i.e. Calcite, Dolomite and Calcium Carbonate. 8. Windows, doors, delicate features or any other areas not required of cleaning should be

protected. 9. Gutters and down-pipes leading to soakaways should be diverted in order that the solid

matter does not impair the drainage system. Consider the use of a geotextile such as ‘Terram’ or ‘Typar’ to aid the separation of solid waste from water.

10. Recommended minimum ambient temperature for operation is normally 5°C. The release of

compressed air at the nozzle induces a temperature drop of 2-3 degrees. 11. The standard size of TORC nozzle is 9mm. The smaller 5mm parallel is best suited to ornate

and less accessible work. For very fine detail, statuary etc. the TORC Studio nozzle in sizes 2 – 4mm is recommended. 9, 5 & 3mm TORC nozzles are approximately equivalent to Jos ‘Standard’, ‘Micro’ & ‘Piccolo’.


12. In practice, the maximum working pressure for the TORC system is approximately 5 bar. 13. The compressor capacity required to operate the 9mm and 5mm nozzles are 90 and 36 cfm

(2500 and 1000 litres per minute) respectively. The 11 and 13mm sizes will require a larger volume of air if operated at full pressure. Please consult Stonehealth for advice.

There may be operational reasons why a diesel compressor is not suitable. It may be appropriate to make use of an electric compressor, if the power supply is sufficient. In general, an electrically driven screw compressor will be much quieter, does not require re-fuelling (or the on-site storage of fuel), and does not require ventilation of exhaust gases.

14. Adjustment of the water and air pressure should be made whilst maintaining an appropriate distance of the nozzle from the work. A balance should be achieved in order to obtain an effective and even cleaning result without abrading the substrate.

In the light of experience gained from producing the trial panels, it will be appropriate to specify the permitted parameters in the main works e.g. type of abrasive to be used, maximum operating pressure.

15. It is advisable that work commences at the uppermost level and continues downward. 16. In some instances it may be necessary to use supplementary techniques to expedite the

process;

a) Pre-soaking of surface contaminants with fine mist water spray, or the DOFF system, allowing a dwell time of several hours. This may soften the unwanted deposits. Its application however should be restricted when retention of hydroscopic components such as lime mortar is required. This is especially the case internally where the stability of the surface may depend upon the low residual moisture levels.

b) Chemical or mechanical paint removal e.g. DOFF system, solvent gel, hot-air gun etc. These are particularly appropriate for thick coatings. Problems may arise, however, in confined (poorly ventilated) areas or conversely in open areas where public access is difficult to control.

c) Use of a spatula / scraper / mason’s chisel or similar tool. This may be applicable to paint but will also be to the removal of thick carbon. Moss and other algael growth, greasy or tarry deposits can be removed with DOFF before TORC work is carried out.

17. Rinsing of the surface should take place every 2-3 square metres or at least before the

unrinsed surface is dry. This can be achieved by use of the wash-down nozzle, or by using the TORC nozzle with the granulate turned off (i.e. just air and water). The latter method uses less water.

To avoid the use of rinse water altogether e.g. during internal usage, careful use of a light brush or vacuum to the dried surface may be sufficient.

18. Following the completion of any repair work it is recommended that a final rinse be given to

remove any residue.

© Not to be reprinted, copied or reproduced in full or in part, without the prior express permission of Stonehealth Limited. Page 1 of 3 Methstat 01/02/07

STONEHEALTH LIMITED Bowers Court, The Broadwell, Dursley, Gloucestershire. GL11 4JE

Telephone: 01453 540600 Fax: 01453 540609

Email: [email protected]

Method Statement & Recommendation for Using the STONEHEALTH Steam DOFF system – Masonry & Building Fabric – Soiling & Coating Removal The STONEHEALTH DOFF ‘superheated water’ system is generally appropriate for the removal of thermoplastic paints (oil based, acrylic, dispersion etc.) and oil, grease, bitumen, algael (and other biological matter including mosses, lichens & fungi etc.), chewing gum etc.

1. The objectives and scope of the project will be taken into account. This will determine the

boundaries for the cleaning / removal process e.g. timescale, access, cost limitation & aesthetic requirements.

2. The areas to be worked will be examined by the Supervising Officer. The said officer will be

assisted by the contractor or other participants having an understanding of the principle and possibilities of the system. Considerations will include safety, substrate condition, control of water and proximity of other works.

3. It should be normal practice before commencement of the cleaning operation that one or

more sample areas are evaluated. Due merit should be given to the following;

a) Areas should be representative of the substrate, soiling and detail of the main works b) Test panels should be positioned discreetly c) Location of the test areas must be recorded and protected from further alteration d) The parameters by which the result is obtained must be recorded e) An acceptable test area should be retained as a control panel for the main works f) Measures adopted as a result of the tests must be attainable and controllable in the main

works 4. The cleaning of the building surface should be carried out by a capable operator who has

received instruction from Stonehealth Ltd into the proper use of the DOFF steam cleaning system. Stonehealth Ltd maintains a record of the induction of each operator.

5. If the Test Supervisor (the Client’s nominated representative) is not familiar with the DOFF

system, they should seek such information from Stonehealth Ltd as to be able to correctly identify the origins of the principle components of the system (equipment serial numbers, nozzle type number).

6. Consideration should be given to protecting windows, doors, delicate features or any other

areas not to be treated. For example ‘Tank-Tape’ and polythene to reduce water ingress through openings. Isolation of vulnerable electrical apparatus, lighting etc.

7. Gutters and down pipes leading to soakaways should be diverted in order that the removed

solid matters do not impair the drainage system. The use of a geo-textile such as ‘Terram’ or ‘Typar’ may be found useful for the control of paint or other solid residues.

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8. It is advisable that work commences at the uppermost level and continues downward. This will (a) reduce the need for re-rinsing and (b) when removing a coating will reduce the exposure of surfaces to residues and water.

9. In some instances it may be necessary to use supplementary techniques to expedite the

process.

a) Chemical paint stripper / softener. This may be beneficial when used in conjunction with the DOFF to increase speed and reduce impact of water pressure. However, precautions applicable to use of such chemicals must be taken into account e.g. Do not use adjacent to watercourses.

b) Certain paints (e.g. lime based) and carbon deposits may require sympathetic

mechanical assistance, such as the Stonehealth TORC system.

c) Where the paint / coating layers are thick and do not immediately peel away it may be

advantageous to have an assistant with spatula or other implement to pull away such layers. Suitable PPE must be worn when such a task is undertaken.

10. Adjustment of the water volume, pressure and temperature controls should be made whilst

maintaining an appropriate distance of the nozzle from the work. A balance should be achieved in order to obtain an effective cleaning result without abrading the substrate. Consideration may also be given to differing nozzle specification i.e. aperture and spray angle.

11. To maintain full temperature at the nozzle, consideration must be given keeping the high-

pressure hoses as short as possible and fitting insulation (pipe lagging) if necessary. This is normally appropriate for hose lengths greater than 30m, or under cold prevailing weather conditions.

12. When progress is difficult it may be found beneficial to carry out cleaning in stages, allowing a

dwell period between applications. 13. Where there is a high risk of water damage to adjacent fabric e.g. during internal usage,

consideration should be given to vacuuming or channelling away unwanted matter and vapour. ‘Steam’ will activate smoke detectors if placed in local proximity.

14. Consideration must be given to all Health & Safety matters. These are;

a) Protective Clothing & Equipment

Normal will be: Rubber dipped cloth gloves, eye protection (visor), ear defenders (above 30 bar pressure), waterproof clothing (skin to be covered). Respiratory equipment will be advisable if toxic coatings are suspected or if bird / animal droppings are to be removed.

b) Electrical Safety

Appropriate electrical ancillaries and supply protection (see the Electrical Considerations sheet). Isolation and / or protection of electrical fittings.

c) Location of DOFF Equipment


Equipment should be placed in a well-ventilated area out of the reach of the lance or other water spray. The exhaust must not be covered or obscured. A purpose made ventilation duct can be used if required in an enclosed area. It will reassure the Operator if the unit can be observed, if only from a distance, by themself or an assistant.

d) Storage & Use of Fuel

Stonehealth Ltd now only advise the use of kerosene (28 sec heating oil) as a fuel for the Hot Box. The Hot Box will function on red or white diesel but will not burn as cleanly both for the machine and the environment. With new equipment, repair work attributable to the use of diesel fuel is no longer covered under the warranty. Kerosene is not suitable for use in engines eg diesel compressors etc. This will be stored in suitable marked containers or drums away from heat or direct sunlight. Storage will not be adjacent to the DOFF heater unit (at least 5 metres distant). Precautions should be made to avoid accidental or malicious spillage. Make use of containment / bunding as required by law. Avoid contact with skin, soil and vegetation. Transfer of fuel to the DOFF should be carried out using a 20 litre Jerry can with ‘clip on’ spout. If storage on site is difficult transfer to the site sufficient only to maintain continuity of working.

e) Storage & Use of Acid Descaler

In hard water areas descaling of the boiler unit will be required in accordance with the Operator Instruction. The descaler will normally be inhibited hydrochloric acid (see product Health & Safety Data Sheet). This should be stored at ambient temperature with controlled access. Preliminary transfer (in a controlled location) into 1 or 2½ litre marked containers will reduce later handling. Protective waterproof clothing, eye protection and rubber gloves / gauntlets are required. Supply of clean water should be readily accessible during usage. Do not dispose of untreated residue: neutralize with Limestone or similar. Neutralized residues may be disposed to the foul drain (not into surface water drainage or watercourse).

f) Education of Personnel

Whilst personnel working in the vicinity need not be inducted into the working of the system they should be made aware of the potential hazards – heat, ventilation, the temperature of metal / rubber components etc. A nominated person adjacent, other than the Operator, should be aware of how to safely shut down the system in circumstances unforeseen.

g) Firefighting Equipment

Maintain access of an appropriate fire extinguisher to suit liquid fire in electrical environment.

15. Following the completion of any repair work it is recommended that a final rinse be given to remove any residue.





Manchester

M2 4BF

3 L10 WINDOWS

3.1 GENERAL

3.2 EVIDENCE OF PERFORMANCE:

Certification: Provide independently certified evidence that all incorporated components

comply with specified performance requirements.

3.3 TIMBER PROCUREMENT:

Timber (including timber for wood based products): Obtained from well managed

forests and/ or plantations in accordance with:- The laws governing forest

management in the producer country or countries.- International agreements such as

the Convention on International Trade in Endangered Species of wild fauna and flora

(CITES).Documentation: Provide either:- Documentary evidence (which has been or can

be independently verified) regarding the provenance of all timber supplied.- Evidence

that suppliers have adopted and are implementing a formal environmental purchasing

policy for timber and wood based products.

3.4 SITE DIMENSIONS:

Procedure: Before starting work on designated items take site dimensions, record on

shop drawings and use to ensure accurate fabrication. The contractor is responsible for

all on site measurement including setting out for new work, details and dimensions for

any replacement or repair work. All dimensions included on the drawing are to be

checked for accuracy on site prior to commencing work and any discrepancies reported

to the Architect immediately. No work shall commence until any such discrepancies

have been resolved. Designated items: [All new windows].

The contractor is to satisfy himself that he is in possession of adequate information

prior to commencing any work. For all new work this specification is to be read in

conjunction with the drawings.

3.5 CONTROL SAMPLES:

Procedure:- Finalise component details.- Fabricate one of each of the following

designated items as part of the quantity required for the project.- Obtain approval of

appearance and quality before proceeding with manufacturer of the remaining

quantity.Designated items: [Glazing bead detail].

3.6 WOOD WINDOWS – VERTICAL & HORIZONTAL SASH WINDOWS / CASEMENT WINDOWS:

Standard: To BS 644.Manufacturer: A firm currently registered under a third party

quality assurance scheme.

Exposure category to BS 6375-1/ Design wind load: [Contractor to confirm exposure

category].Operation and strength characteristics: To BS 6375-2.Timber: Generally to

BS EN 942.-





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M2 4BF

Species: [Douglas Fir].-

Appearance class: J10 for glazing beads, drip mouldings and the like. J40 or better for

all other members.-

Moisture content on delivery: 12-19%.Preservative treatment: [Organic solvent as

section Z12 and WPA Commodity Specification C5; Desired service life 30 years].

Finish as delivered: [Prepared and primed as section M60].

Glazing details:

[Manufacturer: Thindow Unit 1, Warren Hill, Nuffield Lane, Crowmarsh, 0X10 6QN.

Email: www.thindow.co.uk OR EQUAL APPROVED.

Product: Standard Thindow double glazed units – 12mm thick unit split by 4mm clear

glass / 4mm cavity / 4mm Low E glass. GLAZING TO BE INSTALLED AS PER

MANUFACTURERS STANDARDS]. - Beading: [Butyl Putty Externally].Ironmongery/

Accessories: [Weights / cords / pulleys / pull handles / locking fasteners / hinges /

casement stays / handles. Sealmaster seals or equal approved to be installed to

manufacturers recommendations to all window types. Fixing: [Built in with SS cramps].

3.7 EXECUTION:

3.8 PROTECTION OF COMPONENTS:

General: Do not deliver to site components that cannot be installed immediately or

placed in clean, dry floored and covered storage.Stored components: Stack vertical or

near vertical on level bearers, separated with spacers to prevent damage by and to

projecting ironmongery, beads, etc.

3.9 ERECTION ON SITE:

Check all dimensions of components and openings prior to commencing installation of

any joinery works. Report any discrepancies to the Architect.

Nailing of joinery components will not be permitted if nails will be on exposed surfaces

of the completed installation, with the exception of beads to panels or glazing. In these

circumstances pins shall be punched below the surface of the wood and the hole filled

with a suitable filler to match precisely the colour of the timber. Ensure that the filler is

capable of receiving the specified finish and that it will not vary from the colour of the

finished product on completion of all finishing treatments.

Any areas subsequently found not to match will be replaced at the contractors expense.

3.10 PRIMING/ SEALING:

Wood surfaces inaccessible after installation: Prime or seal as specified before fixing

components.

3.11 SEALANT JOINTS:

Sealant:- Manufacturer: [Womersley's Ltd., Tel:01924 400651 or equal approved].

Product reference: [Burnt sand mastic].- Colour: [n/a].- Application: As section Z22

to prepared joints. Finish triangular fillets to a flat or slightly convex profile.

http://www.thindow.co.uk/





Manchester

M2 4BF

3.12 IRONMONGERY:

Fixing: Assemble and fix carefully and accurately using fasteners with matching finish

supplied by ironmongery manufacturer. Do not damage ironmongery and adjacent

surfaces.Checking/ Adjusting/ Lubricating: Carry out at Completion and ensure correct

functioning.

Effective AND affordablethin sealed double glazing units

ACTUAL WIDTHFROM 11MM

D O U B L E G L A Z E D U N I TS

Building Regulations Document L 2010 EnglandSection 6 (Energy) 2010 Scotland

For samples, advice or a quotation call: 01491 642123

� Thindow glazing units are ideal for window restoration projects in historic or period buildings

� Thindow units are produced using the latest Warm Edge Technologyensuring they are as thermally efficient as possible

� Thindow units can significantly reduce noise and sound pollution � Thindow units allow windows to be designed and manufactured with

narrow thin and elegant glazing bars� All Thindow double glazed units are fully guaranteed and can be

delivered nationwide

EN 1279 Reg No.GB6442

Thindow Leaflet_2pp:Layout 1 24/2/11 14:56 Page 1

D O U B L E G L A Z E D U N I TS

CONTACT US FOR A FREE SAMPLETel 01491 642123 Fax 01491 642126 Email [email protected]

Thindow Unit 1, Warren Hill, Nuffield Lane, Crowmarsh OX10 6QN www.thindow.co.uk

Time to consider ?

ACTUAL UNIT WIDTH (from 11mm)

2mm Butyl

4mm Low E Glass

4mm Cavity

4mm Clear Glass

STANDARD SIGHT LINE SUPERSLIM SIGHT LINE

12mm

48mm Overall

20mm

7mm4mm-6mm

6mm

7mm 5mm

Sprig Fixing

Putty

STANDARD SIGHT LINE 7mm

SUPERSLIM SIGHT LINE 5mm

7mm minimum Rebate Depth

2mm Butyl

1mm Butyl

Hotmelt

Super Spacer®

Construction3mm or 4mm Low E / 4mm or 6mm Krypton Gas Filled Cavity / 4mm Clear

A 4mm x 6mm x 4mm unit gives a current U value of 1.5

A 4mm x 4mm x 4mm unit gives a current U value of 1.9

� Thindow Double Glazed Sealed Units are constructed using the latest Super Spacer®

Warm Edge Technology, Low E Glass and Insulating Inert Krypton gas

� Can be fitted into most existing single glazing glass rebates

� Super Spacer® is black as standard but canbe specified as white, charcoal or grey

� Thindow Superslim using the Heritage Super Spacer® allows a minimal sightline of 5mm to be achieved

� Thindow units can be obscure, toughened (only 4mm glass) or clear annealed

� Units can be installed using a sprig fixing and Butyl putty, which is then decorated, or a timber bead glazing bar

� They comply with Building Regulations Document LEngland for improved thermal insulation

� Units can be produced as thin as 11mm (4mm Low E x 4mm Gas x 3 mm Float (unable to toughen3mm glass)

� Shaped glass from template supplied and large pieces for doors are our speciality

� Thindow Double Glazed Sealed Units can be the solution to replacement windows in Listed Buildings

Compliant with part L Building Regulations 2010 EnglandSection 6 (Energy) 2010 Scotland

Thindow Standard & Superslim Configurations - drawings not to scale

DETAILED SECTION - ENLARGED

Thindow Leaflet_2pp:Layout 1 24/2/11 14:56 Page 2

Installation Guidelines

Thindow sealed double glazed units have a Cealomet seal around the edge. They should be treated for installation in timber frames as you would any other untapped double glazed unit.

If the units are fitted badly this will dramatically reduce the life span of the unit, this is why it is so important that you adhere to the guidelines of the Glass & Glazing Federation (GGF) regarding installation.

You must also ensure that the external glazing seals cannot allow any water to get in which is one of the main causes of double glazed units to fail in timber frames.

It is the responsibility of the specifier to identify the make-up of the units, including the glazing bar size and also the need toughened safety glass. We do not accept any responsibility if the toughened safety glass is required but not specified.

We strongly urge that you do not tamper with the hot melt seal nor allow the units to come into contact with chemicals including alcohol based glass cleaner.

The units must be stored in a cool, dry place prior to glazing.

Bedding The Units In -

1. Apertures must be dry before you start the glazing process.

2. We recommend that the units are bedded in on Silfix U9 and fronted off with Butyl Putty (please insure that the putty does not contain Linseed Oil) but can also be fitted onto an appropriate glazing tape.

3. You should allow a minimum space between the outside edge of the unit and the frame of 1.5mm – 2mm.

4. As with all double glazed units, if you are applying the timber beads using glazing tape, it is very important that the bead joints and edges are silicone capped to ensure that no water can penetrate.

Failure to follow the above guidelines may result in your Guarantee becoming void if a unit should fail.

Thindow - Effective and affordable thin sealed double glazing unitsTelephone: 01491 642123 Fax: 01491 642126 Email: [email protected] Unit 1, Warren Hill, Nuffield Lane, Crowmarsh OX10 6QN





Manchester

M2 4BF

4 M60 PAINT / CLEAR FINISHING

4.1 COATING SYSTEMS:

4.2 MICRO-POROUS PAINT TO EXTERNAL PLASTERED/RENDERED SURFACES

• Manufacturer: Keim.

- Product reference: Granital.

• Surfaces: Existing plastered surfaces to sheltered lobbies.

- Preparation: As per attached data sheets.

• Initial coats: Keim Granital Grob as per attached data sheets.

• - Number of coats: 1 - 2

• Finishing coats: Keim Granital

- Number of coats: 2

4.3 GLOSS PAINT: EXISTING FERROUS METALS (RAINWATER GOODS ETC):

• Manufacturer: Dulux.

- Product reference: M2334ALKG

4.4 SATIN PAINT: EXISTING FERROUS METALS (BOOT SCRAPES ETC):

• Manufacturer: Dulux.

- Product reference: M2369ALKG

4.5 SATIN PAINT: NEW EXTERNAL JOINERY (WINDOWS / GATE POSTS ETC):

• Manufacturer: Dulux .

System Code : D4040

4.6 SATIN PAINT EXISTING EXTERNAL JOINERY (DOORS):

• Manufacturer: Dulux .

System Code: D4045 .

4.7 HANDLING AND STORAGE:

• Coating materials: Deliver in sealed containers, labelled clearly with brand name, type

of

material and manufacturer's batch number.

• Materials from more than one batch: Store separately. Allocate to distinct parts or

areas of

the work.





Manchester

M2 4BF

4.8 COMPATIBILITY:

• Coating materials selected by contractor:

- Recommended by their manufacturers for the particular surface and conditions of

exposure.

- Compatible with each other.

- Compatible with and not inhibiting performance of preservative/fire retardant

pretreatments.

4.9 PROTECTION:

• 'Wet paint' signs and barriers: Provide where necessary to protect other operatives and

general public, and to prevent damage to freshly applied coatings.

4.10 SUPERVISED CONTROL SAMPLES:

• Sample areas of finished work: Carry out, including preparation, as follows:

Types of coating

M60/ 4.2.

• Inspection: Give notice when each stage is ready for inspection.

• Approval of appearance: Obtain before commencement of general coating work.

PREPARATION

4.11 PREPARATION GENERALLY:

• Standard: In accordance with BS 6150.

• Suspected existing hazardous materials: Prepare risk assessments and method

statements covering operations, disposal of waste, containment and reoccupation,

and

obtain approval before commencing work.

• Preparation materials: Types recommended by their manufacturers and the coating

manufacturer for the situation and surfaces being prepared.

• Substrates: Sufficiently dry in depth to suit coating.

• Efflorescence salts: Remove.

• Dirt, grease and oil: Remove. Give notice if contamination of surfaces/ substrates has

occurred.

• Surface irregularities: Remove.

• Joints, cracks, holes and other depressions: Fill flush with surface, to provide smooth

finish.

• Dust, particles and residues from preparation: Remove and dispose of safely.

• Water based stoppers and fillers:

- Apply before priming unless recommended otherwise by manufacturer.

- If applied after priming: Patch prime.

• Oil based stoppers and fillers: Apply after priming.

• Doors, opening windows and other moving parts:





Manchester

M2 4BF

- Ease, if necessary, before coating.

- Prime resulting bare areas.

4.12 EXISTING IRONMONGERY:

• Refurbishment: Remove old coating marks. Clean and polish.

4.13 PREVIOUSLY COATED WOOD:

• Degraded or weathered surface wood: Take back to provide suitable substrate.

• Degraded substrate wood: Repair with sound material of same species.

• Exposed resinous areas and knots: Apply two coats of knotting.

4.14 PREPRIMED WOOD:

• Areas of defective primer: Take back to bare wood and reprime.

4.15 UNCOATED WOOD:

• General: Provide smooth, even finish with arrises and moulding edges lightly rounded

or eased.

• Heads of fasteners: Countersink sufficient to hold stoppers/fillers.

• Resinous areas and knots: Apply two coats of knotting.

4.16 PREVIOUSLY COATED STEEL:

• Defective paintwork: Remove to leave a firm edge and clean bright metal.

• Sound paintwork: Provide key for subsequent coats.

• Corrosion and loose scale: Take back to bare metal.

• Residual rust: Treat with a proprietary removal solution.

• Bare metal: Apply primer as soon as possible.

• Remaining areas: Degrease.

4.17 WALL COVERINGS:

• Retained wall coverings: Check that they are in good condition and well adhered to

substrate.

• Previously covered walls: Wash down to remove paper residues, adhesive and size.

APPLICATION

4.18 COATING GENERALLY:

• Application standard: In accordance with BS 6150, clause 9.

• Conditions: Maintain suitable temperature, humidity and air quality during application

and drying.

• Surfaces: Clean and dry at time of application.

• Thinning and intermixing of coatings: Not permitted unless recommended by

manufacturer.

• Overpainting: Do not paint over intumescent strips or silicone mastics.





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M2 4BF

• Priming coats:

- Thickness: To suit surface porosity.

- Application: As soon as possible on same day as preparation is completed.

• Finish:

- Even, smooth and of uniform colour.

- Free from brush marks, sags, runs and other defects.

- Cut in neatly.

• Doors, opening windows and other moving parts: Ease before coating and between

coats.

4.19 PRIMING JOINERY:

• Preservative treated timber: Retreat cut surfaces with two flood coats of a suitable

preservative before priming.

• End grain: Coat liberally allow to soak in, and recoat.

4.20 WORKSHOP COATING OF CONCEALED JOINERY SURFACES:

• General: Apply coatings to all surfaces of components.

4.21 EXTERNAL DOORS

• Bottom edges: Prime and coat before hanging doors.

1

System Code System NameM2369ALKG Dulux Trade Metalshield Satin Finish

Surface Substrate: Metal - Ferrous (Iron / Steel) (interior)Metal - Ferrous (Iron/Steel) (exterior)

Previous Coating: Paint (solvent-based)Paint (water-based)

Surface Condition: Defective - heavy failure /incompatible (>50%)

Durability Performance: NormalNo preferenceHigh

Finish Type: None / no preferenceSolvent-based

Sheen: None / no preferenceMid (Satin / Silk)

Brand: Dulux

Required Finish Coat: Dulux Trade Metalshield SatinFinish

Finish Coat Data Sheet: 541Finish Coat Colour Reference: See Colour Schedule

No. of Finish System Coats: 2NBS Reference: 119ZAAR

· Comply at all times with BS 6150: 2006 Code of Practice for Painting of Buildings (or as amended) and BS EN ISO 12944: 1998 Paints and Varnishes - CorrosionProtection of Steel Structures by Protective Paint Systems (or as amended).

· AkzoNobel Decorative Paints will not accept responsibility for any unauthorised amendments or usage of the wording contained in this System sheet and inPaint's Site Work Instructions v5.

· In order to achieve the optimum results, it is extremely important to adhere to the systems and AkzoNobel Decorative Paint's Site Work Instructions v5 quoted.

· Products supplied for the carrying out of this specification are compliant with Statutory Instrument 2005 No. 2773 (Environmental Protection) - The VolatileOrganic Compounds in Paints, Varnishes and Vehicle Refinishing Products Regulations 2005.

PreparationRemove all coatings. Scrape and wire brush corroded steel to produce a clean metal surface.Rub down with asuitable abrasive and * dust off. All manually prepared surfaces should be prepared to a minimum standard ofSt 3. BS EN ISO 8501-1: 2007 at the time of coating. Note *When rubbing down dry and/or dusting off, weara suitable face mask to avoid the inhalation of dust. (See ICI Site Work Instructions v5 Clause SW 4. 20 forfurther information.)

GlazingOne coat of Dulux Trade Metalshield Zinc Phosphate Primer

All glazing compounds and glazing repairs must comply with BS 8000-7 : 1990 Workmanship on BuildingSites. Code of Practice for Glazing (or as amended). Hack out any loose or defective glazing compounds.Clean the rebates then scrape and wire brush to remove corrosion products and produce a clean metalsurface. Apply: 1 coat of Dulux Trade Metalshield Zinc Phosphate Primer to all bare areas. When the primeris dry, re-glaze prepared areas with metal casement compound used in accordance with the manufacturer'sinstructions.

Priming2 coats of Dulux Trade Metalshield Zinc Phosphate Primer

Prime all bare metal with: 2 coat of Dulux Trade Metalshield Zinc Phosphate Primer applied to give a minimumwet film thickness of 150 microns giving a minimum dry film thickness of 65 microns.

2

Bring ForwardOne coat of Dulux Trade Metalshield Satin Finish

Bring forward all primed areas with: 1 coat of Dulux Trade Metalshield Satin Finish applied to give a minimumwet film thickness of 80 microns giving a minimum dry film thickness of 40 microns.

Finishing System2 coats of Dulux Trade Metalshield Satin Finish of selected shade.

2 coats of Dulux Trade Metalshield Satin Finish each applied to give a minimum wet film thickness of 80microns per coat, giving a minimum dry film thickness of 40 microns per coat.

© Copyright and Database Right 1998 to 2010 AkzoNobel Decorative Paints.

System Code Building Area

M2334ALKG General Metalwork.

Exposure: Internal and External Required Finish Coat: Dulux Trade Metalshield Gloss Finish

Substrate: Ferrous Finish Coat Type: Solvent Based

Severity of Exposure: Severe Finish Coat Data Sheet: 512

Condition of Surface: Coated Metal (RE4-5 failure) Finish Coat Sheen Level: High

Previous Coating: Paint Coating Finish Coat Colour Reference:

See Colour Schedule

NBS Reference: 114ZAAQ No. of Finish System Coats: 2

ICI Paints Reference: MTL/FER/COT/S/RE4/512/2/AspectXPv2005A.01

· Comply at all times with BS 6150: 1991 Code of Practice for Painting of Buildings (or as amended) and ISO 12944: 1998

Paints and Varnishes - Corrosion Protection of Steel Structures by Protective Paint Systems (or as amended).

· ICI Paints will not accept responsibility for any unauthorised amendments or usage of the wording contained in this System

sheet and in ICI Paint's Site Work Instructions v2.

· In order to achieve the optimum results, it is extremely important to adhere to the systems and ICI Paint's Site Work

Instructions v2 quoted.

Preparation Thoroughly clean down to remove all surface contamination. Carefully scrape back to a firm edge all areas of defective paint coatings and rub down to 'feather' the broken edges. Scrape and wire brush corroded steel to produce a clean metal surface. Rub down with a suitable abrasive and *dust off. All manually prepared surfaces should be prepared to a minimum standard of St3. BS 7079. Part A1: 1989 at the time of coating. Note *When rubbing down dry and/or dusting off wear a suitable face mask to avoid the inhalation of dust. (See ICI Trade Paints Site Work Instructions v2 Clause C540 for further information.)

Glazing All glazing compounds and glazing repairs must comply with BS 6262 : 1982 Code of Practice for Glazing for Buildings (or as amended). Hack out any loose or defective glazing compounds. Clean the rebates then scrape and wire brush to remove corrosion products and produce a clean metal surface. Apply: One coat of Dulux Trade Metalshield Zinc Phosphate Primer to all bare areas. When the primer is dry, reglaze prepared areas with metal casement compound used in accordance with the manufacturer's instructions.

Priming Prime all bare metal with: One coat of Dulux Trade Metalshield Zinc Phosphate Primer applied to give a minimum wet film thickness of 115 microns giving a minimum dry film thickness of 50 microns.

Bring Forward Bring forward all primed areas with: One coat of Dulux Trade Metalshield Gloss Finish applied to give a minimum wet film thickness of 80 microns giving a minimum dry film thickness of 40 microns.

Finishing System Two coats of Dulux Trade Metalshield Gloss Finish each applied to give a minimum wet film thickness of 80 microns per coat, giving a minimum dry film thickness of 40 microns per coat.

KEIM Granital Grob

Highly filled exterior paint for base and intermediate coats

Technical Data Sheet

Version 03.12

�

1. Product description Keim Granital Grob is a primary coat and filler for the Keim Granital system which reacts chemically with the surface. Can be used as a bridging coat on previously painted surfaces or to bridge hairline cracks and equalise the surface. The system offers water repellency, vapour permeability and forms a chemical crystalline bond with the substrate. Keim Granital Grob is made using pure inorganic mineral fillers, earth oxide colour pigments and potassium silicate binder.

2. Field of application On all absorbent and mineral surfaces, for filling and closing of hairline cracks and equalising differences in texture. This product may be used in conjunction with the other components of the Keim Granital system. Keim Granital Grob is not suitable for use as a top coat.

3. Product properties Keim Granital Grob is a ready to apply, highly filled mineral based paint with a potassium silicate binder. Non film forming Non flammable UV and weather resistant Water-repellent Extremely vapour permeable Free from solvents and biocides

Material characteristics Specific weight: approx. 1.6g/cm3 Diffusion-equivalent air thickness: sd≤ 0.01m Colour fastness: A1 Density: Q=1.41g/cm3 Thermal Expansion: Comparable to the mineral

substrate onto which it is applied

Particle size: Fine Zone 2 Sand Colour White

4. Application instructions Substrate preparation All loose, flaking and unstable material must be identified and then thoroughly removed, all surfaces must be thoroughly washed down with clean cold water to remove all surface dirt and dust. When all surfaces are clean, sound, wind dry, dust free and free from all surface contaminants, decoration using Keim Mineral Paints may proceed. Application Keim Granital Grob should be diluted with 20% by weight Keim Granital Dilution, brush or roller applied and worked well into all surfaces. After a minimum period of 12 hours a final coat of Keim Granital in the chosen colour may be applied in a like manner, undiluted. Application conditions Ambient and substrate temperature above 5°C and below 30°C. Do not apply in direct sunlight or onto sun-heated surfaces , nor if it is raining or if there is an immediate likelihood of rain. Drying time A drying time of at least 12 hours must be left between coats.

TD KEIM Granital Grob

KEIM

MINERAL PAINTS LTD

Santok Building Deer Park Way, Donnington Wood Telford, Shropshire, TF2 7NA Tel. (01952) 231250 Fax (01952) 231251

www.keimpaints.co.uk [email protected]

Version 03/1

2

Consumption Approx. 0.2kg/m2 Keim Granital Grob and 0.04lt/m2 Keim Granital Dilution.

Consumption rates are offered for guideline purposes only and are quoted for smooth rendered surfaces. Actual rates are the responsibility of the applicator. Project specifications should be referred to for specific rates. Cleaning of tools Clean immediately after use with water

5. Packaging 5kg & 25kg containers

6. Storage Approx. 12 months, if kept cool, but frost free in tightly closed containers.

7. Disposal EC Waste Code No. 08 01 12 Any residues must be emptied out of containers before recycling.

8. Safety instructions Cover surfaces which are not to be painted, in particular glass, natural stone, ceramics etc. Protect the eyes and skin from splashes. Keep out of reach of children. Refer to COSHH data sheet.

The stated values and properties are the result of extensive development work and practical experience. Our recommendations for application, whether given verbally or in writing, are intended to provide assistance in the selection of our products and do not establish a contractual relationship. In particular, they do not release those purchasing and applying our products from the duty of establishing for themselves, with due care, the suitability of our products for the intended application. Standard building industry practices must be complied with. We retain the right to make modifications to improve the products or their application. This edition supersedes all earlier editions.

KEIM Granital Dilution (Keim Special Fixativ)

Dilution and primer for the Keim Granital system


Version 03.12

�

1. Product description Dilution for Keim Granital, Keim Contact Plus, Keim Contact Plus Grob, and Keim Granital Grob. Reacts chemically with the surface. The product comprises of liquid potassium silicate and stabilisers

2. Field of application Used to consolidate friable surfaces as a binder coat and as dilution coat for the Keim Granital systems. The absorbency of highly absorbent mineral substrates can be controlled or reduced using Keim Granital Dilution.

3. Product properties Keim Granital Dilution bonds permanently (silicification) with the substrate, is extremely water vapour permeable, highly resistant to weathering and incombustible. Consolidates the surface Odourless and non toxic Weather resistant Non film forming Non flammable UV and solvent resistant Hinders fungal and mould growth Material characteristics Density: Q = 1,17 g/cm3 Specific weight: 1.03g/cm3 pH value: approx. 11.3

4. Application instructions Substrate preparation All loose, flaking and unstable material must be identified and then thoroughly removed, all

surfaces must be thoroughly washed down with clean cold water to remove all surface dirt and dust. When all surfaces are clean, sound, wind dry, dust free and free from all surface contaminants, decoration using Keim Mineral Paints may proceed. Application For pre-treating highly absorbent substrates: Apply Keim Granital Dilution undiluted with a brush and work well into all surfaces For diluting Keim Mineral Paint systems. See relevant Technical Data Sheets. Application conditions Ambient and substrate temperature above 5°C and below 30°C. Do not apply in direct sunlight or onto sun-heated surfaces , nor if it is raining or if there is an immediate likelihood of rain. Consumption Depending upon the absorbency of the surface, approx. 0.2lt/m2. For use as a dilutant for Keim products please refer to product data sheets. Consumption rates are offered for guideline purposes only and are quoted for smooth rendered surfaces. Actual rates are the responsibility of the applicator. Project specifications should be referred to for specific rates. Cleaning of tools Clean immediately after use with water

5. Packaging 5lt & 20lt containers

TD KEIM Granital Dilution

KEIM

MINERAL PAINTS LTD



Version 03/12


7. Disposal EC Waste Code No. 06 02 99 Any residues must be emptied out of containers before recycling.

8. Safety instructions Keim Granital Dilution is alkaline. Cover surfaces which are not to be painted, in particular glass, natural stone, ceramics etc. Protect the eyes and skin from splashes. Keep out of reach of children. Refer to COSHH data sheet. The stated values and properties are the result of extensive development work and practical experience. Our recommendations for application, whether given verbally or in writing, are intended to provide assistance in the selection of our products and do not establish a contractual relationship. In particular, they do not release those purchasing and applying our products from the duty of establishing for themselves, with due care, the suitability of our products for the intended application. Standard building industry practices must be complied with. We retain the right to make modifications to improve the products or their application. This edition supersedes all earlier editions.

KEIM Granital®

High quality, mineral exterior paint


Version 03.12

�

1. Product description Keim Granital is a classic mineral paint system for use on exterior mineral surfaces. Offers water repellency, vapour permeability and forms a chemical crystalline bond with the substrate. Keim Granital is made using pure inorganic mineral fillers, earth oxide colour pigments and potassium silicate binder.

2. Field of application Exterior mineral paint for all mineral, absorbent surfaces, in particular suitable for both for the renovation of old surfaces and in new construction projects.

3. Product properties Keim Granital is a proven extremely long life exterior mineral paint system with excellent covering power, is non fading and contains only lightfast inorganic colour pigments. Water vapour permeable Colourfast and UV resistant Resistant to mould and fungal growth Free from solvents, biocides and preservatives Incombustible Resistant to industrial fumes and acid rain Highly water repellent Resists fungal and algal growth Material characteristics Specific weight: approx. 1.45g/cm3 Colour fastness: A1 Water vapour diffusion density:

V ≥ 2000g/(m2d) Diffusion-equivalent air-layer thickness:

sd ≤ 0.01m class I

Water permeability rate (24h): w < 0.1 kg/(m2h0.5)

class III (< 0.1) Gloss at 85°:

1.5 (matt) Colour shades White and in accordance with the Keim Palette Exclusiv swatch.

4. Application instructions Substrate preparation All loose, flaking and unstable material must be identified and then thoroughly removed, all surfaces must be thoroughly washed down with clean cold water to remove all surface dirt and dust. When all surfaces are clean, sound, wind dry, dust free and free from all surface contaminants, decoration using Keim Mineral Paints may proceed. Application If the substrate is porous we would advise to first coat all surfaces with Keim Granital Dilution, brush applied and worked well into all surfaces, this will help reduce any high surface porosity and should be left for a minimum period of 12 hours before further decoration. Onto unpainted surfaces Keim Granital should be applied as a two coat system, the first coat to be diluted with up to 30% by weight Keim Granital Dilution and applied by brush or roller, working well into all surfaces. After a minimum period of 12 hours a final coat of Keim Granital may be applied undiluted. For previously painted surfaces Keim Granital Grob diluted with up to 20% by weight Keim Granital Dilution should be used as a first coat. It is important to point out that when any redecoration is taking place this must be taken back to a natural breakline.

TD KEIM Granital®

KEIM

MINERAL PAINTS LTD



Version 03/1

2

Application conditions Ambient and substrate temperature above 5°C and below 30°C. Do not apply in direct sunlight or onto sun-heated surfaces, nor if it is raining or if there is an immediate likelihood of rain. Consumption Approx. 0.4 kg/m2 Keim Granital and 0.06lt/m2 Keim Granital Dilution (at 30% Keim Granital Diution). Consumption rates are offered for guideline purposes only and are quoted for smooth rendered surfaces. Actual rates are the responsibility of the applicator. Project specifications should be referred to for specific rates. Cleaning of tools Clean immediately after use with water

5. Packaging 5kg & 25kg containers


7. Safety instructions Cover surfaces which are not to be painted, in particular glass, natural stone, ceramics etc. Protect the eyes and skin from splashes. Keep out of reach of children. Refer to COSHH data sheet.

The stated values and properties are the result of extensive development work and practical experience. Our recommendations for application, whether given verbally or in writing, are intended to provide assistance in the selection of our products and do not establish a contractual relationship. In particular, they do not release those purchasing and applying our products from the duty of establishing for themselves, with due care, the suitability of our products for the intended application. Standard building industry practices must be complied with. We retain the right to make modifications to improve the products or their application. This edition supersedes all earlier editions.


D4045 Fascias, Soffits, Eaves, Barge Boards, Cladding, Windows, Surrounds, Glazing Bars, Doors, Facings, Screens etc.

Exposure: External Required Finish Coat: Dulux Trade Weathershield Exterior Quick Drying Satin

Substrate: Non-Resinous Softwood, Hardwood etc.

Finish Coat Type: Water Based


Condition of Surface: Light Failure Finish Coat Sheen Level: Mid

Previous Coating: Paint Coating Finish Coat Colour Reference:

See Colour Schedule

NBS Reference: 110VAAF No. of Finish System Coats: 2

ICI Paints Reference: EWD/NRS/COT/S/LTF/428/2/AspectXPv2005A.01







Preparation

Cut out and replace areas of decayed wood and replace with suitably preservative treated wood. Thoroughly clean down the surfaces with Polycell Trade Polyclens All Purpose Wipes, to remove all dirt, grease and surface contaminants. Carefully scrape back to a firm edge all areas of poorly adhering or defective coatings. Rub down to 'feather' broken edges and *dust off. Abrade overall in the direction of the grain to remove any grey denatured timber, raised grain and round all sharp edges (a radius of 1 mm to 2 mm for timber other than sills and thresholds; 3mm for sills and thresholds) and *dust off. Note *When rubbing down dry and/or dusting off wear a suitable face mask to avoid the inhalation of dust. (See ICI Trade Paints Site Work Instructions v2 Clause C540 for further information.) Apply two thin coats of Dulux Trade Knotting Solution to all knots and resinous areas and allow to harden. Ensure all surfaces are fully dry before proceeding.

Glazing All glazing compounds and glazing repairs must comply with BS 8000: Part 7: 1990 (Code of practice for glazing). Hack out all cracked or defective glazing putties. Remove all defective or loose beading. Clean the rebates and apply:One coatof Dulux Trade Weathershield Exterior Preservative Primer OR Dulux Trade Weathershield Exterior Preservative Primer + to all bare areas. Similarly, treat beading and any new wood which is to be spliced-in on all faces and edges, i.e. rub down and prime. REPLACEMENT OF GLAZING COMPOUNDS WHERE NECESSARY: When dry, re-glaze with appropriate glazing compound and allow to harden before further treatment. The compound manufacturer's recommendations must be adhered to, even if at variance with this system. REPLACEMENT OF BEADING WHERE NECESSARY: Bed in a suitable external quality mastic in accordance with the manufacturer's instructions and screw down tightly using non-ferrous fixings.

Priming Spot prime any bare metal, metal fixings nail heads etc with: One coat of Dulux Trade Metal Primer. Prime all sound bare areas and areas exposed by the removal of coatings with: One coat of Dulux Trade Weathershield Exterior Preservative Primer OR Dulux Trade Weathershield Exterior Preservative Primer +.

Making Good Make good all cracks, nail-holes, open joints and other imperfections with Dulux Trade Weathershield Exterior Flexible Filler. When set carefully rub down and *dust off. Note *When rubbing down dry and/or dusting off wear a suitable face mask to avoid the inhalation of dust. (See ICI Trade Paints Site Work Instructions v2 Clause C540 for further information.)

Bring Forward Bring forward all primed and/or filled areas to match existing system build with: One coat of Dulux Trade Weathershield Exterior Flexible Undercoat of appropriate shade.

Finishing System One coat of Dulux Trade Weathershield Exterior Flexible Undercoat of appropriate shade. One coat of Dulux Trade Weathershield Exterior Quick Drying Satin of selected shade. NOTE

Do not apply Dulux Trade Weathershield Exterior Preservative Primer OR Dulux Trade Weathershield Exterior Preservative Primer + over existing surfaces that are in good condition. Any excess primer should be wiped away using a clean lint free cloth. Caution Dulux Trade Weathershield Exterior Preservative Primer contains Acypetacs Zinc and Dichlofluanid. Read the label before you buy: use pesticides safely. NOTE: Dulux Trade Weathershield Exterior Preservative Primer + is a replacement for Dulux Trade Weathershield Exterior Preservative Primer. For a short period of time, both basecoats will be available for use. This replacement will have no affect on the overall durability of the system. Caution Dulux Trade Weathershield Exterior Preservative Primer + contains Dichlofluanid. Read the label before you buy: use pesticides safely. © Copyright and Database Right 1998 to 2005 Imperial Chemical Industries PLC.


D4040 Fascias, Soffits, Eaves, Barge Boards, Cladding, Windows, Surrounds, Glazing Bars, Doors, Facings, Screens etc.

Exposure: External Required Finish Coat: Dulux Trade Weathershield Exterior Quick Drying Satin

Substrate: Non-Resinous Softwood, Hardwood etc.

Finish Coat Type: Water Based


Condition of Surface: New Finish Coat Sheen Level: Mid

Previous Coating: None (New) Finish Coat Colour Reference:

See Colour Schedule

NBS Reference: 110VAAA No. of Finish System Coats: 3

ICI Paints Reference: EWD/NRS/NEW/S/NEW/428/3/AspectXPv2005A.01







Preparation

Woods with a knot content above that specified in BS EN 942 should not be used. New wood should ideally be preservative impregnated, see BS 5589. In some situations this may be mandatory. Thoroughly clean down to ensure all areas are free from dirt, grease and surface contaminants. Carefully remove any plaster or mortar deposits. Remove oils from surface by wiping with White Spirit. Abrade overall in the direction of the grain to remove any raised grain and round all sharp edges (a radius of 1 mm to 2 mm for timber other than sills and thresholds; 3mm for sills and thresholds) and *dust off. Ensure all surfaces are fully dry before proceeding. Note

*When rubbing down dry and/or dusting off wear a suitable face mask to avoid the inhalation of dust. (See ICI Trade Paints Site Work Instructions v2 Clause C540 for further information.) Apply two thin coats of Dulux Trade Knotting Solution to all knots and resinous areas and allow to harden. Ensure all surfaces are fully dry before proceeding.

Priming Spot prime any bare metal, metal fixings nail heads etc with: One coat of Dulux Trade Metal Primer. LIBERALLY APPLY One coat of Dulux Trade Weathershield Exterior Preservative Primer OR Dulux Trade Weathershield Exterior Preservative Primer + overall. Caution Dulux Trade Weathershield Exterior Preservative Primer contains Acypetacs Zinc and Dichlofluanid. Read the label before you buy: use pesticides safely.

Making Good Make good all cracks, nail-holes, open joints and other imperfections with Dulux Trade Weathershield Exterior Flexible Filler. When set carefully rub down and *dust off. Glaze open

rebates with an appropriate glazing compound compatible with the coating system. Follow the manufacturers instructions regarding 'firming off ' / overcoating period. NOTE In the case of bead glazing, ensure rebates and beads are treated on all faces as for the general areas. Bed beads onto suitable flexible glazing mastic before fixing down firmly. Fillers, Stoppers & Glazing Compounds Use only good quality/compatible materials and follow the manufacturers' recommendations for use, even if at variance with this system. Note *When rubbing down dry and/or dusting off wear a suitable face mask to avoid the inhalation of dust. (See ICI Trade Paints Site Work Instructions v2 Clause C540 for further information.) NOTE Linseed oil putty is not suitable for use under woodstains, varnishes or water based systems.

Finishing System Two coats of Dulux Trade Weathershield Exterior Flexible Undercoat of appropriate shade. One coat of Dulux Trade Weathershield Exterior Quick Drying Satin of selected shade. Caution Dulux Trade Weathershield Exterior Preservative Primer contains Acypetacs Zinc and Dichlofluanid. Read the label before you buy: use pesticides safely. NOTE: Dulux Trade Weathershield Exterior Preservative Primer + is a replacement for Dulux Trade Weathershield Exterior Preservative Primer. For a short period of time, both basecoats will be available for use. This replacement will have no affect on the overall durability of the system. Caution Dulux Trade Weathershield Exterior Preservative Primer + contains Dichlofluanid. Read the label before you buy: use pesticides safely. © Copyright and Database Right 1998 to 2005 Imperial Chemical Industries PLC.





Manchester

M2 4BF

5 Z21 MORTAR

5.1 HYDRAULIC LIME MORTAR

5.2 PRODUCT:

Hydraulic Lime Mortar 1:2½-3 using a moderately hydraulic Lime (St. Astier NHL

3.5 or similar approved / first +300mm in St. Astier NHL 5 or similar approved) and

well graded sand aggregates from 2.5mm down to 75 microns

Suppliers to be consulted for variations in aggregates to achieve required

distribution and colour. Mixing and usage to be strictly in accordance with suppliers

recommendations.

5.3 MATERIALS:

Hydraulic Lime or pre-mixed hydraulic lime mortar may be obtained from:

a) Wormersley Associates

Walkley Lane

Heckmondwike

WF16 0PG

Tel : 01924 400651 Fax : 01924 403489

b) Wenlock Lime Ltd

The Coats Kiln

Stretton Road

Much Wenlock

TF13 6DG

Tel : 01952 728611 Fax : 01952 728361

c) Telling Lime Products Limited

Primrose Avenue

Fordhouses

Wolverhampton

WV10 8AW

Tel : 01902 709777 Fax : 01902 398777

5.4 FINE AGGREGATES:

All sand shall be to B.S. 1200, well-graded non-staining clean sharp coarse sand,

uncontaminated by clay/silt. Sand shall be selected so that when the mortar has

dried out the colour will match the colour and texture of the original mortar..





Manchester

M2 4BF

For work requiring very fine joints in the masonry sand grain size may impede filling

the joints. In these instances fine stone dust or brick dust should replace the sand

as the fine aggregate.

Suppliers of lime to be consulted on suitability of sands proposed. Ideally sand to be

obtained from the supplier of the lime.

5.5 PREPARATION OF COARSE STUFF:

Mortar is to be a lime sand mortar and is to be prepared from "coarse stuff" in the

following manner:

Lime and sand "coarse stuff" is to be prepared by mixing fine aggregate with

hydraulic lime in the preparation of 3 parts aggregate to 1 part lime by volume with

only sufficient water added to make the mixture workable. The mix is to match the

existing mortar in colour and texture, samples to be approved by the architect.

5.6 COLD WEATHER PROTECTION:

No work involving the preparation of mortar or the laying of stonework shall be

undertaken when the temperature is 5 degree centigrade falling or below 4 degrees

centigrade when the temperature is rising.

5.7 PROTECTION:

All work is to be protected from the frost and rain with hessian sheets for a

minimum of 7 days or until the mortar has cured if longer.

In warm weather the work is to be protected with hessian sheets which should be

kept moist at all times to avoid curing occurring too quickly.

5.8 DAMAGE DUE TO WEATHER:

Any work affected by the weather is to be cut out and replaced at the Contractor's

expense.

EXTERNAL POINTING OF SANDSTONE MASONRY AND BRICKWORK

5.9 SAMPLE PANELS:

The tenderer is to allow for carrying out one test panel approximately 1 metre

square, using the methods described below. Work to the rest of the stone /

brickwork should not commence until the test panel has been approved.

The location of the test panels is to be agreed prior to commencement.

Tenderer is to allow for several sample mixes using different coloured fine aggregate

to obtain a satisfactory colour for the pointing.

5.10 PREPARATION:

All joints are to be raked out to a depth of 25mm using a fine toothed saw blade or

hooked knife. Extreme care is to be taken to avoid damage to the arris of the brick /

stone.

Under no circumstances will the use of mechanical tools be permitted (disc cutters

etc.)





Manchester

M2 4BF

Joints are to be flushed out using clean water until the water runs clear. Where very

fine joints are encountered a large hypodermic syringe shall be used to flush the

joints.

The tenderer is to allow for the insertion of a backing 'rod'. This item is to be

confirmed during the preparation of the sample area.

The backing rod is to be fine waxed string or string coated with petroleum jelly,

stretched and twisted several times prior to inserting to the back of the prepared

joint with a knife blade.

5.11 FILLING AND POINTING OF SANDSTONE MASONRY:

Filling is to be by the taping and pointing method.

The mortar is to be introduced into damp joints and compressed with a purpose

made pointing iron/key. Mortar is to be thoroughly compacted into the joints.

The mortar is to be pointed firmly into the joints and finished with a very slight

recess (not more than 1mm deep).




5.12 FILLING AND POINTING OF BRICKWORK:

The mortar is to be introduced into damp joints and compressed with a

purpose made pointing iron/key and fully compacted flush with the arises.




5.13 PROGRESS:

The works are to be co-ordinated such that preparation is carried out to agreed

areas and made available for inspection. The Contractor is to give at least 48 hours

notice for inspection.

No filling of joints is to proceed until preparation has been inspected.

Filling and pointing is to be carried out in small areas such that all operations in one

area can be completed within the working day with due notice being paid to any

potential adverse weather conditions.

The work is to be kept clean from mortar spillage at all times.

When pointing commences only area which can be successfully completed during

the normal working day are to be attempted giving due regard to the weather

conditions/forecast.

Completed areas are to be protected until cured.

5.14 CLEANING:

Clean down all areas on completion using clean water and bristle brushes only.

Acid cleaners are not to be used.

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