Readers are advised to check the validity of this Certificate by either referring to the BBA’s website (www.bbacerts.co.uk) or contactingthe BBA direct (Telephone Hotline 01923 665400).

1 The Building Regulations 2000 (as amended) (England and Wales)

The Secretary of State has agreed with the British Board of Agrémentthe aspects of performance to be used by the BBA in assessing thecompliance of remedial damp-proofing (walls) with the Building

Regulations. In the opinion of the BBA, the use of SikaMur-InjectoCream, in anexisting building is not subject to these Regulations, but action to satisfyRequirement C2(a) and Regulation 7 may be necessary for a ‘Material changeof use’ as defined in Regulation 5(a).Requirement: C2(a) Resistance to moisture

Comment: The product satisfies the BBA rising damp test andadequately resists the passage of moisture.

Requirement: Regulation 7 Materials and workmanship

Comment: The product is acceptable. See section 9 of this Certificate.

Sika Services AGTüffenwies 16CH-8048ZurichSwitzerland Tel: 00 41 44 436 4880 Fax: 00 41 44 436 4686website: www.sika.com

AgrémentCertificate

No 07/4419

Designated by Governmentto issue

European TechnicalApprovals

SIKAMUR-INJECTOCREAMCouche d’étanchéité pour murs par injection chimiqueFeuchtigkeitssperre im Wandbereich

Product

Regulations• THIS CERTIFICATE RELATESTO SIKAMUR-INJECTOCREAM,A PRODUCT FOR FORMINGA DAMP-PROOF COURSE INEXISTING WALLS.• Installation is carried out inaccordance with BS 6576 :2005 and the Property CareAssociation (PCA) Code ofPractice COP02 : 1997.• Replastering is necessary toprevent damage to subsequentredecoration. To avoid splitresponsibility, this should beconducted by the installer or hisapproved agent.

CI/SfB

Yu6

2

2 The Building (Scotland) Regulations 2004 (as amended)

In the opinion of the BBA, the use of SikaMur-InjectoCream, in anexisting building is not controlled by these Regulations, but action tosatisfy the Regulation and related Mandatory Standards below may be

necessary for a ‘Conversion’ as defined in Regulation 4 of these Regulations.Regulation: 8 Fitness and durability of materials and workmanshipRegulation: 8(1) Fitness and durability of materials and workmanship

Comment: The product can contribute to a construction satisfying thisRegulation. See section 9 and the Installation part of thisCertificate.

Regulation: 9 Building standards — constructionStandard: 3.3 Flooding and ground waterStandard: 3.4 Moisture from the groundStandard: 3.10 Precipitation

Comment: The product satisfies the BBA rising damp test and adequatelyresists the passage of moisture and can contribute to satisfyingthese Standards, with reference to clauses 3.3.1(1)(2),3.4.1(1)(2), 3.4.5(1)(2) and 3.10.1(1)(2).

Regulation: 12 Building standards — conversions

Comment: All comments given for this product under Regulation 9, alsoapply to this Regulation, with reference to clause 0.12.1(1)(2)

and Schedule 6(1)(2).(1) Technical Handbook (Domestic).(2) Technical Handbook (Non-Domestic).

3 The Building Regulations (Northern Ireland) 2000 (as amended)

In the opinion of the BBA, the use of SikoMur-InjectoCream, in anexisting building is not controlled by these Regulations, but action tosatisfy Regulations B2 and C4 may be necessary for a ‘Material change

of use’ under Regulation A9.Regulation: B2 Fitness of materials and workmanship

Comment: The product is acceptable and does not release solvent for anunreasonable period. See section 9 of this Certificate.

Regulation: C4 Resistance to ground moisture and weather

Comment: The product satisfies the BBA rising damp test and adequatelyresists the passage of moisture.

4 Construction (Design and Management) Regulations 2007Construction (Design and Management) Regulations (Northern Ireland)1995 (as amended)

Information in this Certificate may assist the client, CDM co-ordinator orplanning supervisor, designer and contractors to address their obligationsunder these Regulations.See section: 6 Delivery and site handling (6.3).

Technical Specification

5 Description5.1 SikaMur-InjectoCream is a concentratedviscous silane/siloxane emulsion cream, and ismanufactured by a controlled, batch-blendingprocess.

5.2 The product is packed in a foil cartridge forinsertion into an applicator gun.

5.3 The process involves delivering a set amountof the product via the applicator into a series ofholes drilled into the mortar course and thesubsequent replastering.

5.4 Quality control is exercised over raw materials,during production and on the final product.

6 Delivery and site handling6.1 The product is supplied in 600 ml foilcartridges.

6.2 The product should be stored in a cool, dryplace and protected from frost.

Design Data

7 General7.1 SikaMur-InjectoCream is satisfactory for use toprovide a barrier against rising damp where thereis no damp-proof course or where the existingdamp-proof course has failed.

7.2 The product is for use in accordance withBS 6576 : 2005 in existing:• solid walls of brickwork, blockwork or masonry,

up to 600 mm thick• conventional cavity walls or• walls of rubble-filled construction of any thickness.

7.3 Replastering is necessary to retain salts in thebody of the wall and prevent damage tosubsequent redecoration. Reference should bemade to the Appendix for details of the replasteringspecification.

8 Drying timeAfter treatment, a 230 mm, solid brick wallpreviously affected by rising damp should normallydry out in 6 to 12 months, provided normal heatingis used during the winter months. A thicker wall maytake longer. Where hygroscopic salts are present, thewall may not dry out completely but the replasteringsystem will prevent damage to internal decorations.

9 DurabilitySilicone masonry surface water repellentsfor masonry are known to be effective for12 years. These products are applied to

the surface of a wall, but a dpc application

saturates the wall in depth. The SikaMur-InjectoCream process is expected to remaineffective for at least 20 years.

Installation

10 GeneralInstallation of the SikaMur-InjectoCream should becarried out in accordance with BS 6576 : 2005and the Property Care Association Code ofPractice COP02.

11 Action with respect to flooring timbers11.1 Where a suspended timber floor isindependently supported on sleeper walls, with aneffective damp-proof course and showing no signsof dampness, these need not be treated (seeFigure 1).

Figure 1 Suspended timber floor on sleeper wall

11.2 Where a suspended timber floor issupported on joists and/or a wall plate bearingon, or embedded in, the wall, there is a possibilityof decay, particularly where concealed timbers arein contact with the damp wall. The condition ofthese timbers should be ascertained and remedialaction taken if necessary (see Figure 2).

Figure 2 Check embedded timber for decay

check condition oftimbers in direct contactwith damp wall

150 mmminimum

inserted dpc

existing dpc

sleeper wall

3

11.3 If damage is limited to the joist ends, thefloors may be re-formed, using sleeper walls orjoist-hangers, to isolate the timbers from the dampwall (see Figure 3).

Figure 3 Isolation of timber joists from damp wall

11.4 If the timbers are sound, the existing floormay be retained provided the injected damp-proofcourse is formed below the timber joists and/orwall plate (see Figure 4).

Figure 4 Inject dpc below wall plate

12 Preparation12.1 The course to be injected is chosen so thatthe position of the horizontal damp-proof coursecomplies, as far as is practicable, with therecommendations of BS 6576 : 2005, Clause 4.3(see section 11.4) of this Certificate.

12.2 Internal walls on solid floors are treated asclose to the floor as possible.

12.3 Complementary vertical damp-proof coursesare positioned, where necessary, to isolate treatedwalls from the effects of rising damp in adjoiningwalls or to maintain continuity between horizontaldamp-proof courses at different levels.

12.4 Internal plastering affected by hygroscopicsalts is removed from the area to be treated to a

minimum height of one metre above the dpc levelor 300 mm above the salt line (whichever ishigher) to comply with the recommendations ofBS 6576 : 2005. Internal skirtings and flooringare also removed, as necessary, to expose thearea for treatment. Externally, the proposed damp-proof course line is exposed, where necessary, byremoving any facing material.

13 Procedure13.1 Untreated walls are isolated by theinjection of a vertical dpc throughout the thicknessof the wall.

13.2 Particular care is taken to avoid bridging thedamp-proof course, either internally or externally.Where external rendering has been removed, it isrestored, ending in a bell casting above theinjected damp-proof course.

13.3 The original survey may have identified otherpossible causes of dampness, and measures torectify these are taken as necessary.

13.4 Holes 12 mm in diameter are drilled at thebase of perpends and at intervals of 120 mm orless along the selected mortar course, to depths forvarious wall thicknesses as shown in Table 1.

Table 1 Depth of hole required/application rate

Wall thickness(1)

4½” 9” 13½” 18”(115 mm) (230 mm) (345 mm) (460 mm)

Depth of hole (mm) 100 190 310 430

(1) For thicker walls the depth of hole should be to within 40 mm of theopposite face.

13.5 Solid walls of brick or stone should bedrilled/treated from one side only in a singleoperation. The selected mortar course is drilled atthe prescribed centres to the appropriate depth,(see Table 1). Where this is not possible adviceshould be sought from the Certificate holder.

13.6 For preference, cavity walls should betreated from both sides but, if the thickness of theindividual leaves permits, may be treated fromone side. When undertaking treatment from oneside, the drill must pass completely through theselected mortar course, then across the cavity andto a depth of 100 mm in the other leaf. Thecavity must be clear before treatment.

13.7 If possible, in random stone and rubble infillwalls, the mortar course should be followed at theappropriate selected level, or drillings may bemade into porous stone. Where the variablethickness of stone walls and the possibility of rubbleinfill dropping and blocking injection holes causesdifficulties, it may be necessary to drill to 50% ofthe wall thickness, from both sides at acorresponding height. Alternatively, additionalholes should be drilled adjacent to obstructed

150 mmminimum

inserted dpc

inject dpc below soundtimbers in direct contactwith damp wall

150 mmminimum

injected dpc

further corrosion protection,eg bitumen paint,may be necessary on themasonry flange

floor joist supportedby joist hanger

4

holes to ensure that an adequate volume of theproduct is introduced to the wall.

13.8 The injection process consists of loading theSikaMur-InjectoCream into the applicator gun andinserting the gun delivery tube into the full length ofthe predrilled hole. Each hole is backfilled fully withthe product to within 10 mm of the surfaceby slowly squeezing the gun trigger. When treatingcavity walls from one side it is essential that theholes in each leaf are filled.

13.9 Holes in the external wall surfaces areplugged with sand/cement mortar coloured tomatch the existing wall surface.

13.10 The treated walls are left for a period of atleast 14 days to allow initial drying out. Internalplastering is applied using a renovating plaster asdescribed in the Appendix.

Technical Investigations

The following is a summary of the technicalinvestigations carried out on SikaMur-InjectoCream.

14 TestsTests were carried out by the BBA to determine:• effectiveness against rising damp, generally to

MOAT No 39 : 1988, Method 4.3.1.4(1)

• total and active solids content to a BBA testspecification

• specific gravity to BS 3900-A19 : 1998• flashpoint to BS 3900-A9 : 1986.(1) Method 4.3.1.4 test procedure : the small scale

pillar test was set up as shown in Figure 7 ofMOAT No 39 with the exception that the waterlevel was raised above the untreated mortar line.The test samples were subjected to the followingprocedure:

Day Test procedure

0 Base separated from pillar, treatedand allowed to cure

2 Base replaced under pillar

21 Dwell period introduced — waterremoved from trough

28 Dwell period ended. Trough refilled with water

15 Investigations15.1 The manufacturing process was examined,and the raw material specifications, formulationand quality control procedures were established.15.2 Existing data on the effectiveness of silicone-based products as a chemical dpc wereexamined.

15.3 Existing data on the effectiveness anddurability of similar materials used as externalsurface water repellents were examined and an

assessment was made of the durability of theinjection material.

15.4 A visit was made to a site in progress toassess the practicability of installation.

Bibliography

BS 882 : 1992 Specification for aggregates fromnatural sources for concrete

BS 6576 : 2005 Code of practice for diagnosisof rising damp in walls of buildings and installationof chemical damp-proof courses

BS 8481 : 2006 Design, preparation andapplication of internal gypsum, cement, cementand Z plastering systems — Specification

BS 3900-A9 : 1986 Methods of test for paints —Tests on liquid paints — Determination of flashpoint(closed cup equilibrium method)BS 3900-A19 : 1998 Methods of test for paints— Determination of density by the pyknometermethod

BS EN 13914-2 : 2005 Design, preparation andapplication of external rendering and internalplastering — Design considerations and essentialprinciples for internal plastering

MOAT No 39 : 1988 The assessment of damp-proof course systems for existing buildings

Property Care Association COP02 Code ofPractice for Installation of Remedial Damp-proofCourses in Masonry Walls

5

6

Conditions of Certification

16 Conditions16.1 This Certificate:• relates only to the product/system that is named

and described on the front page• is granted only to the company, firm or person

named on the front page — no other company,firm or person may hold or claim any entitlementto this Certificate

• is valid only within the UK• has to be read, considered and used as a

whole document — it may be misleading andwill be incomplete to be selective

• is copyright of the BBA• is subject to English law.

16.2 References in this Certificate to any Act ofParliament, Statutory Instrument, Directive orRegulation of the European Union, British,European or International Standard, Code ofPractice, manufacturers’ instructions or similarpublication, are references to such publication inthe form in which it was current at the date of thisCertificate.

16.3 This Certificate will remain valid for anunlimited period provided that the product/systemand the manufacture and/or fabrication includingall related and relevant processes thereof:• are maintained at or above the levels which

have been assessed and found to be satisfactoryby the BBA

• continue to be checked as and when deemedappropriate by the BBA under arrangements thatit will determine

• are reviewed by the BBA as and when itconsiders appropriate.

16.4 In granting this Certificate, the BBA is notresponsible for:• the presence or absence of any patent,

intellectual property or similar rights subsisting inthe product/system or any other product/system

• the right of the Certificate holder to manufacture,supply, install, maintain or market theproduct/system

• individual installations of the product/system,including the nature, design, methods andworkmanship of or related to the installation

• the actual works in which the product/system isinstalled, used and maintained, including thenature, design, methods and workmanship ofsuch works.

16.5 Any information relating to the manufacture,supply, installation, use and maintenance of thisproduct/system which is contained or referred to inthis Certificate is the minimum required to be metwhen the product/system is manufactured,supplied, installed, used and maintained. It doesnot purport in any way to restate the requirementsof the Health & Safety at Work etc Act 1974, or ofany other statutory, common law or other dutywhich may exist at the date of this Certificate; noris conformity with such information to be taken assatisfying the requirements of the 1974 Act or ofany statutory, common law or other duty of care. Ingranting this Certificate, the BBA does not acceptresponsibility to any person or body for any loss ordamage, including personal injury, arising as adirect or indirect result of the manufacture, supply,installation, use and maintenance of thisproduct/system.

In the opinion of the British Board of Agrément, SikaMur-InjectoCream is fit for its intended useprovided it is installed, used and maintained as set out in this Certificate. Certificate No 07/4419is accordingly awarded to Sika Services AG.

On behalf of the British Board of Agrément

Date of issue: 1st May 2007 Chief Executive

Appendix

This Appendix relates to Sika Services AGReplastering Specification, based on SikaMurAdditive.

Technical Specification

1 DescriptionSika Services AG Replastering Specification consistsof SikaMur Additive, a combined waterproofing,salt retardant and plasticiser additive for use insand/cement replastering mixes on existing internalwalls following the insertion of a chemical dpcsystem.

2 Delivery and site handling2.1 The packaging, shelf-life and storagerequirements are given in Table 1.

Table 1 Packaging arrangements, shelf-life andstorage requirements

Product Packaging details Shelf-life and storagedetails requirements

SikaMur Additive 1, 5 and 25 litre Two years when stored incontainers a dry place. Protect from

frost, high temperature anddirect sunlight

2.2 The product is innocuous in normal use.However, it should not be swallowed or splashedinto the eyes. If splashing occurs, eyes should bewashed with copious quantities of clean water andmedical attention sought.

2.3 The product’s packaging bears the BBAidentification mark incorporating the number of thisCertificate.

Design Data

3 General3.1 SikaMur Additive for sand/cement mixes issatisfactory for application to walls of all types ofmasonry where there has been rising damp andremedial dpc treatment has been conducted.

3.2 SikaMur Additive mixes are applied at athickness of 12 mm using the normal proceduresdefined in BS 8481 : 2006 and BS EN 13914-2 :2005, and finished using 3 mm of conventionalfinish plaster.

3.3 The plaster has good resistance to mechanicaldamage.

3.4 Normal methods for fixing and chasing canbe used, but the surface should be restored usingSikaMur Additive sand/cement mix.

4 Resistance to salt transfer

Where rising damp has created a high salt contentin walls and an effective chemical dpc remedialtreatment has been conducted, and where no othersource of water ingress exists, Sika Services AGReplastering Specification will provide an effectivebarrier against salt transfer.

5 DurabilityThe durability of Sika Services AG ReplasteringSpecification is equivalent to traditional plasteringto BS 8481 : 2006 and BS EN 13914-2 : 2005.

Installation

6 General6.1 The remedial chemical damp-proofingtreatment is conducted in accordance withBS 6576 : 2005.

6.2 The standard of installation of Sika ServicesAG Replastering Specification should comply withBS 8481 : 2006 and BS EN 13914-2 : 2005.

6.3 Replastering should not normally beconducted for at least 14 days after the remedialdpc installation.

6.4 If the background is impermeable and offerslittle suction (ie where rising damp has occurred inthe mortar joints), the joints are raked out to providea mechanical key and/or a bonding aid isapplied to the surface and the wall replasteredimmediately.

7 ApplicationPreparatory work

7.1 Details such as timber skirtings should beremoved as described in the specification.

7.2 Plaster is removed back to masonry to aheight as described in the specification, but shouldbe to a minimum height of one metre above thedpc level or 300 mm above the salt line(whichever is higher) to comply with therecommendations of BS 6576 : 2005.

7.3 Mortar joints are raked out to a depth of15 mm.

7.4 Timber fixing grounds present in the masonryare removed.

Mixing

7.5 The water must be clean, free from oil, dirt orother injurious chemicals (water suitable fordrinking, if available).

7

First coat7.6 A mix of three parts sand to one part cementusing gauging water containing SikaMur Additiveis prepared(1). The sand should be specified aswashed, sharp sand, loam-free, satisfying therequirements for M grading as laid down inBS 882 : 1992. The cement should be fresh andfree flowing.(1) Mix one part SikaMur with between 24 and 39 parts

water — 1:24 gives maximum water resistance and1:39 is suitable for general plastering applications.

7.7 A minimum of water is used to ensure a densecoat; an approximation is not more than 8 litres per50 kg of dry mix.

7.8 The mix is compacted into joints and renderedto give an overall thickness of 12 mm, without over-trowelling. When the cement obtains its first set,this surface is scratched to form a key.

Second coat7.9 The mix, as for the first coat but with additive-free water, is applied to a thickness of 12 mmwithout over-trowelling, giving an overall thicknessof 25 mm of render. This coat should be appliedbefore the first coat has finally set, to obtain asatisfactory adhesion between the rendering coats.The surface should be scratched to form a key forthe finishing plaster.

Finish coat7.10 This should be a mix of a conventional finishplaster, applied to a thickness of 3 mm (advice onsuitability should be sought from the Certificateholder). Other finishes are acceptable providedthey are porous. The surface must not be polished.

Miscellaneous7.11 Where masonry is unstable this must bemade good prior to the application of therenderings. Where it is not possible to obtain aproper bond between the wall fabric andrendering, eg with cob walling, expanded metallath must be fixed to the wall surface beforeapplication.

7.12 To prevent any damp within a solid floorbeing transferred into the soft setting coat, renders

and plasterwork may extend behind the skirtingsbut should not join the finished floor level.

7.13 Gypsum plaster or lightweight premixplasters must not be used to bond metal anglebeads to corners.

7.14 Where conventional timber skirtings are tobe fixed, these should be cut to size and fullyworked, with a minimum of three brush coats ofwood preservative applied. It should be noted thatthe walls will take a considerable time to dry outand it is possible that sufficient moisture wouldingress into the new joinery to cause fungal decay.

7.15 Skirting that has been removed but is stillsound should have the specified number of coats ofa suitable timber preservative applied to theunpainted surfaces. It is also recommended that theback and bottom of skirtings are given two coats ofa bituminous paint, or backed with joinery liner.

7.16 Where practicable, all joinery should befixed by the use of masonry nails. If not, inorganicfixing grounds should be used, ie plastic, buttimber may be used provided it is cut to size andfully worked and immersed for the specified time ina suitable timber preservative before being insertedinto the damp masonry.

7.17 It is important that the specification is strictlyadhered to and not varied in any way. No otheradditives must be added to the mix, unlessapproved by the manufacturer. Lightweight gypsumpremix backing or bonding plasters must not beused.

Technical InvestigationsThe following is a summary of the technicalinvestigations carried out on Sika Services AGReplastering Specification.

8 InvestigationsAn assessment was made of Sika Services AGsafety assessments on SikaMur Additive under theControl of Substances Hazardous to HealthRegulations 2002 (COSHH).

British Board of AgrémentBucknalls Lane, GarstonWatford, Herts WD25 9BAFax: 01923 665301

©2007For technical or additional information,contact the Certificate holder (seefront page).For information about the AgrémentCertificate, including validity andscope, tel: Hotline 01923 665400,or check the BBA website.

e-mail: mail@bba.star.co.ukwebsite: www.bbacerts.co.uk