twickenham proposed first floor plan proposed loft plan ... · proposed loft plan (scale 1:50)...

BoundaryBoundary

Up

EXISTING GROUND FLOOR PLAN(scale 1:100)

DINING ROOM

KITCHEN

LIVING ROOM

BoundaryBoundary

Up

EXISTING FIRST FLOOR PLAN(scale 1:100)

Up

BEDROOM

BEDROOM

BATHROOM

BoundaryBoundary

EXISTING LOFT PLAN(scale 1:100)

Up

LOFT

BoundaryBoundary

EXISTING ROOF PLAN(scale 1:100)

Ridge

Chimney

Chimney

Boundary

Up

BEDROOM

BATHROOM

Up

Boundary

PROPOSED FIRST FLOOR PLAN(scale 1:50)

BEDROOM

SD

ALL PARTITIONSENCLOSING THE STAIRS ISTO HAVE 30 MINUTES FIRERESISTANCE INCLUDINGGLAZING

FD 20

FD 20

Up

Boundary Boundary

PROPOSED LOFT PLAN(scale 1:50)

Loadbearing stud

ROOF LIGHTSMin U-value of 1.6 W/m²K.Roof-lights to be double glazedwith16mm argon gap and soft low-Eglass. Window Energy Rating to be BandC or better. Roof lights to be fitted inaccordance with manufacturer'sinstructions with rafters doubled up tosides and suitable flashings etc.

62.5mm KingspanKooltherm K18Dry-lining boardsfixed to timberbatten framing

62.5mm KingspanKooltherm K18Dry-lining boardsfixed to timberbatten framing

Loadbearing stud

100mm Kingspan ThermawallTW55 between plus 22mmGyproc Thermaline Basic overwith VCL fixed to internal face ofinsulation.

100mm KingspanThermawall TW55between plus 22mmGyproc ThermalineBasic over with VCLfixed to internal face ofinsulation.

Dormer side to have1/2h fire protection

M08 (308)780x1400 GHLVelux window

BEDROOM

SD

Loadbearing stud

Steel ridge beam203x203x46 kg/m UC

BoundaryBoundary

PROPOSED ROOF PLAN(scale 1:100)

Chimney

Dormer flat roof

Ridge

STEELWORK AND JOISTS LAYOUT(scale 1:50)

Supply and install new structuralelements such as new beams, roofstructure, floor structure, bearings,and padstones in accordance withthe Structural Engineer'scalculations and details. New steelbeams to be encased in 12.5mmGyproc fireline board with staggeredjoints nailed to timber cradles orpainted in Nullifire S or similarintumescent paint to provide 1/2hour fire resistance.

Main bearer steel beamspliced at 1/3rds splicedetail as per engineersdrawing / calculations

Sta

ir tri

mm

er 1

2x17

0x47

mm

C24

Boundary Boundary

at 400 c/c170x47 C16Floor joists


Steel beam (rear)203x203x46 kg/m UC

Steel beam (front)203x203x46 kg/m UC


Stru

tting

Stru

tting

Stair trimmers 22x170x47mm C24

BoundaryBoundary

Up

PROPOSED GROUND FLOOR PLAN(scale 1:50)

DINING ROOM

EXTENDED KITCHEN

LIVING ROOM

Down

Supply and install newstructural elements suchas new beams, roofstructure, floor structure,bearings, and padstonesin accordance with theStructural Engineer'scalculations and details.New steel beams to beencased in 12.5mmGyproc fireline board withstaggered joints nailed totimber cradles or paintedin Nullifire S or similarintumescent paint toprovide 1/2 hour fireresistance.

Existing structureincluding foundations,beams, walls and lintelscarrying new and alteredloads are to be exposedand checked foradequacy prior tocommencement of workand as required by theBuilding Control Officer.

Trimmers around rooflights tobe as per structural engineersdetails and calculation

Form to Soakaway to B.R.E. 365The soakaway should be a minimumof 5m away of any building and be atleast 1 cubic metre in size. Wheresoakaways are not suitable due to claysubsoil then rainwater to be taken toexisting separate surface water sewer.

New big

170x47 mm at 400 c/cFlat roof joists C16

EXTRACT TO KITCHENKitchen to have mechanical ventilationwith an extract rating of 60l/sec or 30l/secif adjacent to hob to external air, sealed toprevent entry of moisture. Internal doorsshould be provided with a 10mm gapbelow the door to aid air circulation.Ventilation provision in accordance withthe Domestic Ventilation ComplianceGuide. Intermittent extract fans to BS EN13141-4. Cooker hoods to BS EN13141-3. All fixed mechanical ventilationsystems, where they can be tested andadjusted, shall be commissioned and acommissioning notice given to the BuildingControl Body.


Trimmers around rooflights tobe as per structural engineersdetails and calculation

New folding doors


SteelBeam1-203x203x46UC

SD

HD

350longx215widex215deepconcretepadstone







SteelBeam4-178x102x19UB

2 x

170x

50 m

m C

16

Dwg. no:Scale:

As shownDate Drawn:

For:

Project:

Drawn by:

K. Miller

10LINEAR SCALE 1:50 & 1:100

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KJM10026BR

May-2018

B

LOFT CONVERSION & SINGLE STOREY REAREXTENSION

14 SEATON ROAD,TWICKENHAM

SPECIFICATION.GENERAL :- Attic conversion with dormer window to rear. Single storey extensionto rear. Where building to boundaries the adjacent owner is to be informed under theterms of the Party Wall Act 1996 and its provisions followed. All dimensions must bechecked on site and not scaled from this drawing. Any dimensions given are inmillimetres.The Contractor is responsible for checking all dimensions on site prior tocommencement of the works with any errors being reported to KJM Design as soonas possible. Any construction work carried our prior to receiving all necessaryapprovals for Planning/Building Regulations is entirely at the householders / Clientsrisk. All building work to be completed to the satisfaction of the Local AuthorityBuilding Control Officer and in accordance with the current Building Regulationsand as such additional unforeseen building works may be required on site. TheContractor shall inspect all adjoining properties which may be affected by the worksprior to the commencement or works and record and report with the owner anydefects. The Contractor shall be entirely responsible for the security, strength andstability of the building duting the course of the works. Drawings are produced forthe purposes of obtaining Building Regulations Approvals only and DO NOTconstitute full working drawings. All Drawings are the copyright of KJM Design.This drawings may not be copied or reproduced without prior written permission.PART P BUILDING REGULATIONS ELECTRICAL SAFETY:- Whereelectrical work is required to comply with Schedule 1 of the Building regulations itwill either: a. Be carried out by an individual or company registered under the competent persons scheme .b. Be carried out by an individual or company who will provide a certificate inaccord with BS 7671 upon completion.

c. Where work is carried out by an individual or company not described above theinstallation will be tested by a person competent to do so under the provisions ofBS 7671 and a certificate issued to the applicant in accordance with the testingrequirements of the British Standard.

1. EXISTING MAIN ROOF STRUCTURE :- The existing main roof structurecomprises roof tiles to 100x50mm rafters at 400mm c/c, supported on one number150x50mm purlins per pitch. Ceiling joists are 100x50mm at 400mm c/c totraditional lath and plaster ceiling. Existing roof structure to be assessed by astructural engineer and any alterations to be carried out in strict accordance withstructural engineer’s details and calculations which must be approved by buildingcontrol before works commence on site. The existing roof condition must be checkedand be free from defects as required by the Building Control Officer any defectivecoverings or felt to be replaced in accordance with manufacturer’s details.2. THERMAL BRIDGING :- Care shall be taken to limit the occurrence of thermalbridging in the insulation layers caused by gaps within the thermal element, (i.e.around windows and door openings). Reasonable provision shall also be made toensure the extension is constructed to minimise unwanted air leakage through thenew building fabric.3. SITE PREPARATION :- Ground to be prepared for new works by removing allunsuitable material, vegetable matter and tree or shrub roots to a suitable depth toprevent future growth. Seal up, cap off, disconnect and remove existing redundantservices as necessary. Reasonable precautions must also be taken to avoid danger tohealth and safety caused by contaminants and ground gases e.g. landfill gases, radon,vapours etc. on or in the ground covered, or to be covered by the building.4. MATERIALS AND WORKMANSHIP:- All works are to be carried out in aworkmanlike manner. All materials and workmanship must comply with Regulation 7of the Building Regulations, all relevant British Standards, European Standards,Agreement Certificates, Product Certification of Schemes (Kite Marks) etc. Productsconforming to a European technical standard or harmonised European product shouldhave a CE marking5. EXISTING STRUCTURE :- Existing structure including foundations, beams,walls and lintels carrying new and altered loads are to be exposed and checked foradequacy prior to commencement of work and as required by the Building ControlOfficer.6. BEAMS :- Supply and install new structural elements such as new beams, roofstructure, floor structure, bearings, and padstones in accordance with the StructuralEngineer's calculations and details. New steel beams to be encased in 12.5mmGyproc FireLine board with staggered joints, Gyproc FireCase or painted in NullifireS or similar intumescent paint to provide 1/2 hour fire resistance as agreed withBuilding Control. All fire protection to be installed as detailed by specialistmanufacturer.7. EXISTING TO NEW WALL :- Cavities in new wall to be made continuouswith existing where possible to ensure continuous weather break. If a continuouscavity cannot be achieved, where new walls abuts the existing walls provide amovement joint with vertical DPC. All tied into existing construction with suitableproprietary stainless steel profiles.8. PROPOSED ROOF STRUCTURE :- The existing rafters are to re-inforcedwith 150x47 C16 at 400 c/c connected to existing with 100x3mm. Wire nails at400c/c with min. 30mm edge distance. 110mm Kingspan Kooltherm K7 insulationset beween rafters at 400c/c with min 50mm ventilation gap maintained to undersideof sarking felt as above to underside fixed with a further 37.50mm KingspanDry-lining Kooltherm K18 insulation ( including 12.5mm plasterboard - vapourcheck type, manufactured fixed ) fixed across face of rafters. To give a total thicknessof 135mm Kingspan finished in 12.5mm P/B to give a U-value of 0.18. Or alternativeto achieve required U-value of 0.18. New steel ridge beam to structural engineerdetails supported at existing gable walls. Support provide to rafters at eaves on viastud at 400c/c with doubled 125x47mm bearer to top with angled fillet to topsupported on new bearer beams. 100x47mm C16 for restraint to eaves to existingrafter feet. Existing vents at eaves level are capable to provide 25 000mm2/m. Newvents at ridge to be provided with a capacity of 50 000mm2/m. All roof-lights to haveEDN type flashing for flush fit installation. Roof-lights to be double glazedwith16mm argon gap and soft low-E glass. Window Energy Rating to be Band C orbetter. Roof lights to be fitted in accordance with manufacturer's instructions withrafters doubled up to sides and suitable flashings etc.9. DORMER FLAT ROOF CONSTRUCTION:- Three layers of built up roofingclass 3 to BS 747 finished with bitumen-bedded stone chippings to a depth of12.50mm. The top layer to be mineral surfaced bituminous fully bonded to glass fibrebased underfelt layer. Vapour barrier on 19mm WBP plywood to BS 1455 all laid tofalls via softwood firrings. Softwood treated timber flat roof joists as specified170x47 C16 at 400mm c/c with min. 100mm end bearing. 100mm Kooltherm K7 isrequired between the joists and 42.5mm Kooltherm K18 under to provide a 'U' valueat 0.18 or better. Height of firrings to suit 50mm ventilated air gap betweeninsulation and plywood. 12.7mm Duplex Gyproc plasterboard and skim finish ceilinginternally. Vertical tiles set to battens and felt on 22mm marine grade ply - for wallswhich are more than 1000mm from boundary and on 9mm Supalux Promat cementparticular boards ( for half hour fire resistance ) - for walls which are within 1000mmof boundary, set to framing. Insulation between and over studs; 100mm KingspanThermawall TW55 between plus 22mm Gyproc Thermaline Basic over with VCLfixed to internal face of insulation. Finish with 3mm skim coat of finishing plaster togive a U-value of 0.28mm. All junctions to have water tight construction, seal allperimeter joints with tape internally and with silicon sealant externally. Doublerafters each side of new dormer window.10. EXTERNAL WALLS AND FOUNDATIONS :- The external walls are to bein a facing brick to match existing comprising of 103mm brickwork to the externalleaf with 1.1.6 cement/lime/sand. 100mm cavity with 100mm Rockwool'Full-fill'Dritherm or other approved insulation material. 100mm thermal insulating blockworkCelcon or Thermalite on the inner leaf with mortar as before, 13mm thickness BritishGypsum plaster, all to achieve a'U' value of 0.28. Cavity wall insulation carriedbelow dpc and overlapped by 150mm with floor insulation and to meet with roofinsulation at top of wall. Cavity insulation carried the full extent of gable walls.Cavity must not be closed at eaves with blockwork. All cavity closers to be insulated.Insulation in accord with 'robust construction details'. All external and internal leafsare to be securely retained by approved stainless steel wall ties to BS1243 positioned450mm apart vertically and 750mm horizontally.

Dormer to be set in by more than 200mmRoof lights will not project more than 150mm.Dormer face and cheek will be tile to match existing.

General:

If the building work is carried out close to a public sewer then thesewage owner should be contacted and if required a build overagreement entered into before works commence on site.

The foundation depth stated on this drawing is the minimum depthyou should excavate to. If there are any trees within 15m of theexcavation site then they should be identified and checked againstNHBC guidelines 'building close to trees' thereafter a revisedfoundation depth/design may be required. If any doubt surroundsthe exact species/type of any tree within the 15m zone of influencethen a tree specialist should be employed.

9mm Supalux Promat cement particularboards ( for half hour fire resistance ) -for walls which are within 1000mm ofboundary, set to framing.

All new drainage and sanitary pipework, including layout,materials, bedding/surround etc, must be discussed and approvedon site by a Building Control Surveyor prior to installation. Airand running tests will be required on completion of works.

New roof tiles to be selected for suitability for shallow pitch roofs. Thenew tiles are to be laid as per manufacturer’s instructions to suit shallowpitch roofs down to 15 degrees. Where possible colour of new roof tilesto match those of the main roof as closely as possible.

The residential sprinkler system is to bedesigned and installed to BS 9251:2005incorporating BAFSA technical guidance noteNo.1 June 2008 by a suitably qualifiedspecialist- which must be approved by BuildingControl before works commence on site.

BCO AMENDS:

The residential sprinklersystem is to be designed andinstalled to BS 9251:2005incorporating BAFSAtechnical guidance note No.1June 2008 by a suitablyqualified specialist- whichmust be approved byBuilding Control beforeworks commence on site.

BCO AMENDS:

- Chimney stacks/flues where adjacent to raised building/loft conversions, to be suitablyincreased in height. Section 73 of The Building Act 1984.

- The residential sprinkler system is to be designed and installed to BS 9251:2005 incorporatingBAFSA technical guidance note No.1 June 2008 by a suitably qualified specialist- which mustbe approved by Building Control before works commence on site.

- Insect mesh is required to the flat roof dormer eaves.

- All doors to rooms (including bathrooms) opening onto the staircase must be half hour fireresisting.

- All external walls adjoining timber floors should have airbricks to BS493 ensuring that vent.air will have a continuous path between opposite sides of all sub-floor voids. The air bricksshall allow the passage of 3000mm2 for each metre of running wall. Any trunking or pipesneeding to carry ventilation air should be min. 100mm dia.

kevinmiller

Square

PROPOSED FRONT ELEVATION(scale 1:50)


Continuous ridge vent

Vent

PROPOSED SIDE ELEVATION(scale 1:50)

3 Layers of felt finished with bitumen-bedded stone chippings toa depth of 12.50mm.


Single ply membraneroofing providing aa firerating for surface spreadof flame with a currentBBA or WIMLASCertificate and laid tospecialist specification

New brickworkto match existing


M04 (304)780x980 GHL2 x Velux windows

New roof tilesto match existing

PROPOSED REAR ELEVATION(scale 1:50)

Cubic Volume 29.75m3


Single ply membrane roofing providing aa firerating for surface spread of flame with a currentBBA or WIMLAS Certificate and laid tospecialist specification

New folding doors

Roof dome1000x1000 mm





Code 4 lead soakersdressed to existingroof tiles&behindnew dormer tiles



PROPOSED ADJ. SIDE ELEVATION(scale 1:50)







EXISTING FRONT ELEVATION(scale 1:100)

EXISTING ADJ. SIDE ELEVATION(scale 1:100)

EXISTING REAR ELEVATION(scale 1:100)

EXISTING ADJ. SIDE ELEVATION(scale 1:100)

Dwg. no:Scale:

As shownDate Drawn:

For:

Project:

Drawn by:

K. Miller10

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General:






Wall ties at openings spaced not more than 300mm vertically provided within225mm. from sides of openings at unbonded jambs. Lean mix cavity fill to all cavitywalling terminating min. 225mm below lowest DPC level. Cavity insulation to finishat same level as floor slab insulation. Below ground level both leaves shall be built inTrench-blocks or class 'b' engineering brickwork. All external walls adjoining timberfloors should have airbricks to BS493 ensuring that vent. air will have a continuouspath between opposite sides of all sub-floor voids. The air bricks shall allow thepassage of 3000mm2 for each metre of running wall. Any trunking or pipes needingto carry ventilation air should be min. 100mm dia. Foundations in accordance withBS8004. All foundations subject to ground conditions to have at least 750mm coverbelow ground level. Minimum foundation depth in clay soil to be 900mm.Foundations shall be extended below pipe or ductwork penetrating walling. Oversiteconcrete will be level with or above the finished ground level. Foundation designmust be approved by the BC officer subject to site investigation. Unsuitable loadbearing strata will necessitate separate structural design. Should it be found that anOak or Poplar tree is located within 18m of the intended foundations or should anyother species of tree lie within a radius of 8m then the depth of the foundations mustbe increased to a provisional depth of 1.5m (subject to LA building inspectorsapproval). If, during excavating to the recommended foundation depths,vegetation/fibrous roots are still being encountered, then the foundation depth shallbe increased to 500mm below the level of the existing roots. If any nearby trees are tobe removed as part of the ongoing works then the need for heave precautions to thenew foundations should also be considered.(a) Concrete trench fill founds to all load bearing cavity walls to be min. 600 x1000mm deep.11. SOLID FLOOR SLAB:- 75mm concrete screed, on vapour barrier, on 75mmKingspan insulation with a 25mm upstand of insulation provided to perimeter edgesof floors, on 150mm re-inforced concrete slab on 1200mm gauge DPM lapped towall DPC. Sand blinding and minimum 150mm clean compacted hardcore. A lesserstandard of insulation may be acceptable should problems be encountered withmatching existing floor levels. Confirm with BCB.12. LATERAL RESTRAINT TO FLOOR AND ROOF:- All floors and roofs tobe anchored by Bat or Catnic metal anchors ( 30 x 5 mild steel). Straps to be securedto timber and walls min.1000mm long at max.1.2mm c/c ( 1.8m c/c in single storeyconstruction.)13. FLAT ROOF CONSTRUCTION - rear extension:- To achieve U value 0.18W/m²K. Flat roof to be single ply membrane roofing providing aa fire rating forsurface spread of flame with a current BBA or WIMLAS Certificate and laid tospecialist specification. Single ply membrane to be fixed to 22mm exterior qualityplywood over 120mm Kingspan Thermaroof TR27 /FM LPC. Insulation bonded to22mm external quality plywood decking or similar approved on sw firings tominimum 1 in 60 fall on sw treated 47 x 170mm flat roof C16 timber joists at 400mmctrs or as Structural Engineer's details and calculations. Underside of joists to have12.5mm foil backed plasterboard and skim. Provide cavity tray to existing housewhere new roof abuts existing house. Provide restraint to flat roof by fixing of 30 x 5x 1000mm ms galvanised lateral restraint straps at maximum 2000mm centres fixedto 100 x 50mm wall plates and anchored to wall. New rooflights as per plan.Rooflights to have EDN type flashing for flush fit installation. Rooflights are AArated. Trim out rafters as required for new rooflights with doubled trimmers top andbottom. Double rafters either side of the rooflights.14. PITCHED ROOF CONSTRUCTION - rear extension:- New roof tiles tomatch existing laid to gauge with 100mm headlaps on 50 x 25mm tanilised softwoodbattens secured with wire nails to BS5534. Kingspan nilvent breathable membranelaid to manufacturer's instructions. (150mm laps) laid horizontally over specifiedrafters. 150 x 47 mm C16 rafters at 400mm c/c secured to a 100 x 50mm softwoodwallplate strapped down to the external cavity wall as already specified and to newsteel beam to structural engineer details at the top. 110mm Kingspan Kooltherm K7insulation set between rafters at 400c/c with min 25mm ventilation gap maintained tounderside of the breathable membrane to underside fixed with a further 37.50mmKingspan Dry-lining Kooltherm K18 insulation ( including 12.5mm plasterboard -vapour check type, manufactured fixed ) fixed across face of rafters. To give a totalthickness of 135mm Kingspan finished in 12.5mm P/B to give a U-value of 0.18.Where new roofs abut new or existing brickwork provide for code 4 lead flashingstepped where required with patent cavity trays fitted over where required.Horizontal and vertical straps for lateral support as described above positioned atintervals not exceeding 1.8m. New velux windows as per plan. All velux windows tohave EDN type flashing for flush fit installation. Velux windows are AA rated. Trimout rafters as required for new windows with doubled trimmers top and bottom.Double rafters either side of velux windows.15. NEW ATTIC FLOOR :- 22mm T&G flooring grade chipboard ( V313 gradewater resistant to new bathroom) to 170x47mm C16 at 400 c/c. Doubled trimmers tofloor and for stair opening to be 170x47mm C24 as per floor plan. Floor joistsdoubled below all new stud partitions as per plan. Provide for mid span herringbonestrutting as per floor plan. Provide for Chickenwire mesh laid over the existingceiling joist with 100mm Rockwool flexislab (for half hour fire protection to theexisting ceiling ) set between at 400 c/c carried to eaves voids where it is to beoverlaid with 175mm Rockwool quilt insulation. To give a total thicknes to unheatedvoids of 275 mm.16. LINTELS & STEELWORK:- Unless otherwise stated lintels to be Catniccombined steel to BS5977 (sizes as recommended by manufacturer). Provide min.150mm end bearing where bearing is less than 150mm concrete padstones are to beprovided( sizes to suit load and detail). All lintel backs and soffits to have min. halfhour fire resistance and be insulated to prevent cold bridging where necessary. Wheresteel U.B's are used they are to be braced together 300mm from each bearing pointand at mid span & set to concrete padstones each end. Half hour fire protection tosteelwork as above.17. DAMP PROOF COURSES :- Horizontal and vertical DPC's will comply withBS743(pitch polymer) and be incorporated :-(a) min. 150mm above ground to all load bearing walls, lapped with floor damp proofmembrane.(b) Vertically built into jambs of all external openings.(c) Horizontally stepped to all external openings.18. DRAINAGE :- The existing drainage system is a single line combi system.UPVC fittings to BS 4514, BS 5255. Baths, sink units, showers - 42mm dia. wastesvia 75mm traps. WC pans - 100mm dia. with 100mm traps. Where WHB wasteexceeds 1.75m. length or Bath/Shower exceeds 2.3m. anti-syphon traps to be fitted.Below ground drainage to comprise Marley UPVC pipes to BS 4660 & BS5481 orsimilar. Laid on granular bed material to BS 882 table 4. The selected fill should befree from stones larger than 40mm clay exceeding 100mm, timber, vegetable matteror frozen material. Where rigid pipes of less than 150mm dia. have less than 300mmcover, or rigid pipes of 150mm or more have less than 600mm of cover the pipesshould be encased in 150mm concrete. Where flexible pipes are not under a road orhave less than 600mm cover they should be encased in 150mm concrete. Wheredrainage runs within 1metre of any foundation and the level of the drain is below thelevel of the foundation then the drain trench should be backfilled to the found levelwith concrete. Any pipe penetrating through a structure below ground level shouldhave a lintel above opening ( or use of rocker pipes ) and a settlement gap of 50mmcorkpack or similar flexible material should be inserted to provide protection to thedrain. Pipe to be either rocker type or hole around fitted with compressible material.All gravity drainage should have a min. fall requirement of 1:40 to provide selfcleansing velocities. All gullies will be back inlet trapped gullies with rodding facilityunless otherwise stated. Inspection chambers of up to 900mm depth may be of aUPVC or GRP material or constructed of 150mm concrete base slab with benchingformed in 1.2 cement mortar to 1.12 gradient trowelled smooth with all channels,branches and connecting bends. The walls are to be 225mm, class 'B' engineeringbrick to BS 3921 to the required invert depth. 150mm concrete cover slab withhaunching forming the cover level complete with frame and lid. Where foul andsurface water are available on site connections must be proved.

BCO AMENDS:

- Chimney stacks/flues where adjacent to raised building/loft conversions, to be suitablyincreased in height. Section 73 of The Building Act 1984.

- The residential sprinkler system is to be designed and installed to BS 9251:2005 incorporatingBAFSA technical guidance note No.1 June 2008 by a suitably qualified specialist- which mustbe approved by Building Control before works commence on site.


- All doors to rooms (including bathrooms) opening onto the staircase must be half hour fireresisting.

- All external walls adjoining timber floors should have airbricks to BS493 ensuring that vent.air will have a continuous path between opposite sides of all sub-floor voids. The air bricksshall allow the passage of 3000mm2 for each metre of running wall. Any trunking or pipesneeding to carry ventilation air should be min. 100mm dia.

KJM10026BR

May-2018

B


kevinmiller

Square






50mm clear air gapabove the insulation tohelp ventilate the roof.

Rockwool flexislab 100 mm on chickenwire

Re-inforce ex. rafterswith 150x47 C16

protectionto u/s stairs

1/2 HR Fire

37.5mm KingspanDry-lining K18

110mm KingspanKooltherm K7


3 Layers of felt finished with bitumen-bedded stone chippings to a depth of 12.50mm.

Flat roof joists

firrings

19mm plywood

175 mmInsulation

100 mmInsulationEx. ceiling joists 100x50

at 400c/c


170x47 C16 at 400c/c

100mm Kooltherm K7 is required between the joists and42.5mm Kooltherm K18 under.Height of firrings to suit50mm ventilated air gap between insulation and plywood.

Main bearer steel beamsspliced at 1/3rds splicedetail as per engineersdrawing / calculations

protectionto u/s stairs

1/2 HR Fire

Rockwool flexislab 100 mm on chickenwire over existing stair enclosure

or toothed plate connectorsbolted with either M8 boltsfor restraint to rafter feet100x47 C16

Loadbearing stud

100mm Kingspan ThermawallTW55 between plus 22mmGyproc Thermaline Basic overwith VCL fixed to internal face ofinsulation.


TYPICAL SECTION(scale 1:50)

Steel beam (rear)203x203x46 kg/m UC Steel beam (front)

203x203x46 kg/m UC


STAIR DETAILscale 1:20

220mm - min. go 220mm - max. rise

50mm minimum treadon stair winders

2x Timber lintels

Welted drip

Fascia

19 mm. Marine Ply

Flat roof joists170x47 C16 at 400 c/c

Firring

Tiling battens

Vertical tiles

Breathable membrane - Kingspan nilvent

22 mm ply

3 Layers of felt finished with bitumen-bedded stone chippings to a depth of 12.50mm.

DORMER ROOF DETAILscale 1:10

100mm Kooltherm K7between the joists and42.5mm Kooltherm K18under

100mm KingspanThermawall TW55

22mm Gyproc Thermaline Basic over with VCLfixed to internal face of insulation. Finish with3mm skim coat of finishing plaster.

100mm KingspanThermawall TW55

Breathable sarkingmembrane Kingspan Nilvent



Rafters 150x47 mm C16at 400 mm c/c

Cubic Volume 29.75m3








Flat roof joists 170x47 C16at 400c/c

120mm Kingspan ThermaroofTR27 /FM LPC



dpm dpc

TYPICAL SECTION(scale 1:50)

2 x 170x50 mm C16

TYPICAL DETAIL - DRAINAGE PIPE THRU FOUNDATIONscale 1:20

New cavity wall

New foundation

Drainage pipe

Drainage pipe

New cavity wall1

VIEW 1-11

Pre-stressedconcrete lintel(s)

50mm Celotexor polystyrene

Granular beddingmaterial

Sub soil or bedrock

Pre-stressedconcrete lintel(s)

50mm Celotexor polystyrene

Granular beddingmaterial

Sub soil or bedrock

F.L.

G.L.

75 mm insulation

1200 gauge dpm

dpc100 mm blockwork inner leaf

150 mm ground bearing re-inforcedconcrete slab. Use A393 mesh attop with min. 20mm cover.

Foundation to bear on naturalstiff clay with bearing capacity100 KN/m²

Below ground level bothleaves to be built inTrench-blocks or class 'b'engineering brickwork

75 mm screed finishes on 75 mminsulation on 500 G vasqueen

Sand blinding and min. 150mmclean compacted hardcore

C25 (grade of concrete)trench fill 600x1000mm deep

103 mm brickwork outer leaf 100 mm cavity full fill insulation

FOUNDATION DETAIL(scale 1:20)

REQUIRMENT FOR BUILDOVER AGREEMENT

The client must contact their water company to check if a buildover agreement with them is required. If it is deemed that a buildover agreement is needed then they must apply for this via theirwater companies procedure and ensure the agreement is placeprior to commencement of any ground works.

double flangeFurfix profile

Insulation

FURFIX PROFILE JOINTING DETAIL

Vertical DPCchased 60mmex. and 30mmto cavity

(scale 1:10)

12.5 mm P/B

single flangeFurfix profile

Blockwork

Ex. solid wall

Brickwork

WELTED DRIP DETAIL

Fascia

Welted drip

Gutter

Vapour barrier

22 mm. Ply

Firring

12,5 mm P/B

Blockwork

Flat roof joists 170x47 C16at 400c/c



(scale 1:10)

Brickwork

(scale 1:10)

FirringFascia

Welted drip

Vapour barrier

Blockwork

CHECK KERB DETAIL

Flat roof joist 170x47C16 at 400c/c

Brickwork

22 mm. Ply



Battens

New roof tilesto match existing

Rafters 150x47 C16 at 400 c/c

Breathable sarkingmembrane KingspanNilvent

ROOF DETAIL - main roof(scale 1:10)



F.L.

G.L.

75 mm insulation

1200 gauge dpm

dpc100 mm blockwork inner leaf

150 mm ground bearing re-inforcedconcrete slab. Use A393 mesh attop with min. 20mm cover.

Foundation to bear on naturalstiff clay with bearing capacity100 KN/m²

Below ground level bothleaves to be built inTrench-blocks or class 'b'engineering brickwork

75 mm screed finishes on 75 mminsulation on 500 G vasqueen

Sand blinding and min. 150mmclean compacted hardcore

C25 (grade of concrete)trench fill 600x1000mm deep

103 mm brickwork outer leaf 100 mm cavity full fill insulation

ECCENTRIC FOUNDATION DETAIL(scale 1:20)

REQUIRMENT FOR BUILDOVER AGREEMENT

The client must contact their water company to check if a buildover agreement with them is required. If it is deemed that a buildover agreement is needed then they must apply for this via theirwater companies procedure and ensure the agreement is placeprior to commencement of any ground works.

Dwg. no:Scale:

As shownDate Drawn:

For:

Project:

Drawn by:

K. Miller10

LINEAR SCALE 1:50 & 1:1002 3 4 5 6 7 8 9 10m

1:500 1 2 3 4 5m1:100

10

23

45

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89

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45m

1:100

LINEA

R SC

ALE

1:50 &

1:10

0


2 3 4 5 6 7 8 9 10m1:50 0 1 2 3 4 5m1:100

10

23

45

67

89

10m

1:50

01

23

45m

1:100

LINEA

R SC

ALE

1:50 &

1:10

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Page:

003Rev:



General:






Priority order for surface water is 1. Soakaway which must be designed to complywith BRE 365. The soakaway should be a minimum of 5m away of any building andbe at least 1 cubic metre in size. 2. A watercourse or 3. A sewer. Rainwaterconnections to foul sewers may only be made where soakaway and watercoursecannot be used. On completion the system is to be water pressure tested and cleansed.19. TIMBER PARTITIONS:- 100x50mm vertical softwood studs at 600c/csecured to 100x50mm head and sole plates. Noggins at 600mm intervals. 12.7mmGyproc plasterboard and skim finish to both sides. Provide 25mm Isowool APR 1200sound insulation to partition voids at bathrooms & around bedrooms to comply withE2 requirements for sound deadening. Floor joists to be doubled up when runningparallel with and under timber partitions. Stud to eaves to be 100x100mm at 400c/cwith 125x47mm doubled bearer beam to top with timber fillet to provide support tore-inforced rafters to roof set on new main bearer beam. Insulation between and overstuds; 100mm Kingspan Thermawall TW55 between plus 22mm Gyproc ThermalineBasic over with VCL fixed to internal face of insulation. Finish with 3mm skim coatof finishing plaster to give a U-value of 0.28mm. All load bearing stud partitions tobe 100x100mm C16 at 400c/c with min. 12 mm ply or OSB face to either side.20. INTERNAL WALL LININGS:- Exisitng gable walls at loft to be upgraded withKingspan Kooltherm K18 insulation system comprising 62.5mm KingspanKooltherm K18 ( containing 12.5mm P/B-vapour check type ) insulated Dry-liningboards ( fixed to timber/battens ( 50x25mm at maximum 600mm c/c - the wider sideof the timbers to faced the solid wall ) all to provide a 'U' Value of 0.28 or less all tobe skim finished.21. FIRE PRECAUTIONS: - All doors to stairway serving habitable rooms are tobe FD20 doors with 25x38mm rebates ( existing to be replaced with new ). 18mmfireline board to underside of new staircase to skim finish. Mains operated, selfcontained and inter linked smoke alarms must be provided at each landing level. Thesmoke alarms must conform to BS 5446 : Part 1. All units to have recharchablebatteries in case of mains power loss. New attic floor to have Rockwool flexislab onchickenwire as above. Any glazing to the stairway enclosure to be replaced withfire-resisting (un-insulated) glazing retained by a suitable glazing system and beadscompatible with the type of glass.22. FRAMES, CASINGS, SKIRTINGS, ARCHITRAVES :- New externalwindows to be UPVC and double glazed. Internal door linings shall be 100 x 38 withplanted stops. Skirting boards shall be 100 x 19mm. chamfered. Architraves shall be75x19 chamfered. Window frames to be double glazed with safety glazing to alldoors, side panels, and all areas extending below 800mm from floor level. New orreplacement windows double glazed with 16mm air gap or 12mm argon filled gapand a both finished soft low 'E' coating to achieve U-value of 1.6. New doors withmore than 50% internal glazed area to have a U value of 1.8 and 1.8 if less than 50%internal glazed area. Installed either by Fensa registered installer or compliance viacertificate from L.A. Building control. ( fee Payable.) Max. area of windows, doorsand roof lights should not exceed 25% of floor area of the extension.23. ELECTRICAL INSTALLATION:- All electrical work required to meet therequirements of Part P (electrical safety) must be designed, installed, inspected andtested by a competent person registered under a competent person self certificationscheme such as BRE certification Ltd, BSI, NICEIC Certification Services or ZurichLtd. An appropriate BS7671 Electrical Installation Certificate is to be issued for thework by a person competent to do so. A copy of a certificate will be given to theCouncil. Mains operated linked smoke alarm detection system to BS 5446 - 1:2000and BS5839-6:2004 to at least a Grade D category LD3 standard and to be mainspowered with battery back up. Smoke alarms should be sited so that there is a smokealarm in the circulation space on all levels/ storeys and within 7.5m of the door toevery habitable room. If ceiling mounted they should be 300mm from the walls andlight fittings. Where the kitchen area is not separated from the stairway or circulationspace by a door, there should be an interlinked heat detector in the kitchen. Installlow energy light fittings that only take lamps having a luminous efficiency greaterthan 45 lumens per circuit watt and a total output greater than 400 lamp lumens. Notless than three energy efficient light fittings per four of all the light fittings in themain dwelling spaces to comply with Part L of the current Building Regulations.24. GAS INSTALLATION AND HEATING:- Extend all heating and hot waterservices from existing and provide new TVRs to radiators. Heating system to bedesigned, installed, tested and fully certified by a GAS SAFE registered specialist.All work to be in accordance with the Local Water Authorities bye laws, Gas safetyrequirements and IEEE regulations. Heating and hot water will be supplied via a wallmounted condensing vertical balanced flue pressurised boiler with a min SEDBUKrating of 90%. No combustible materials within 50mm of the flue. System to be fittedwith thermostatic radiator valves and all necessary zone controls and boiler controlinterlocks. The system will be installed, commissioned and tested by a "competentperson" and a certificate issued that the installation complies with the requirements ofPART L.25. NATURAL AND MECHANICAL VENTILATION:-

a) Habitable room:- Rapid ventilation - 1/20th of floor area - for a hinged or pivot window

that opens 30° or more, or for sliding sash windows. 1/10th of floor area -for a hinged or pivot window that opens less than 30°.

- Background ventilation - 5000 mm²b) Kitchen:

- Rapid ventilation - opening window- Background ventilation - 2500 mm²- Extract ventilation fan rates - 30 l/s adjacent to a hob or 60l/s elsewhere

Extract as above required for Kitchen at ground floor. Location of mechanical ventilation devices in rooms:

a) Cooker hoods should be 650mm to 750mm above the hob surface (or followmanufacturer's instructions).

b) Mechanical extract fans should be placed as high as practicable and preferablyless than 400mm below the ceiling. Refer to Appendix E Approved Document F forfurther guidance of installation of fans in dwellings.26. STAIRS :- Dimensions to be checked and measured on site prior to fabricationof stairs. Timber stairs to comply with BS585 and with Part K of the BuildingRegulations. Max rise 220mm, min going 220mm. Two risers plus one going shouldbe between 550 and 700mm. Tapered treads to have going in centre of tread at leastthe same as the going on the straight. Min 50mm going of tapered treads measured atnarrow end. Pitch not to exceed 42 degrees. The width and length of every landingshould be at least as great as the smallest width of the flight. Doors which swingacross a landing at the bottom of a flight should leave a clear space of at least 400mmacross the full width of the flight. Min 2.0m headroom measured vertically abovepitch line of stairs and landings. However, if there is not enough space to achieve thisheight the headroom will be satisfactory if the height measured at the centre of thestair width is l.9 m reducing to 1.8m at one side of the stair. Handrail on staircase tobe 900mm above the pitchline, handrail to be at least one side if stairs are less than1m wide and on both sides if they are wider. Ensure a clear width between handrailsof minimum 600mm. Balustrading designed to be unclimbable and should contain nospace through which a 100mm sphere could pass. Allow for all structure as designedby a Structural Engineer.THE CONTRACTOR SHALL ALLOW FOR MAKING GOOD OF ALLDISTURBED WORKS.Other Notes , Alterations.1. All existing foundations, beams and/or lintels accepting additional load, are to beexposed, if necessary, for consideration by the Building Control Surveyor andupgraded if found necessary. All materials can be deviated from with an alternative ofsimilar or superior properties. All deviations to be approved prior to installation bybuilding control officer.

BCO AMENDS:

- Chimney stacks/flues where adjacent to raised building/loftconversions, to be suitably increased in height. Section 73 ofThe Building Act 1984.

- The residential sprinkler system is to be designed andinstalled to BS 9251:2005 incorporating BAFSA technicalguidance note No.1 June 2008 by a suitably qualifiedspecialist- which must be approved by Building Controlbefore works commence on site.


- All doors to rooms (including bathrooms) opening onto thestaircase must be half hour fire resisting.

- All external walls adjoining timber floors should haveairbricks to BS493 ensuring that vent. air will have acontinuous path between opposite sides of all sub-floorvoids. The air bricks shall allow the passage of 3000mm2for each metre of running wall. Any trunking or pipesneeding to carry ventilation air should be min. 100mm dia.

KJM10026BR

May-2018

B


kevinmiller

Square

twickenham proposed first floor plan proposed loft plan ... · proposed loft plan (scale 1:50)...

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