Indicatesdemolition
ExistingSideElevation
Scale1:100
ExistingFrontElevation Scale1:100
ExistingRearElevation Scale1:100
GroundFloor
FirstFloor
SecondFloor
GroundFloor
FirstFloor
SecondFloor
GroundFloor
FirstFloor
SecondFloor
ProposedRearElevation
Scale:1:100
ProposedFrontElevation
Scale1:100
ProposedSideElevation Scale1:100
ProposedSideElevation
Scale1:100
Indicatesdemolition
ExistingSectionA-A Scale1:100
ExistingSectionB-B Scale1:100
EXISTINGGROUND
FLOORPLAN
scale1:100
EXISTING ROOFPLAN
scale1:100
EXISTINGFRONT ELEVATION
scale1:100
EXISTINGLEFT-SIDE (SOUTH)ELEVATION
scale1:100
EXISTINGREAR ELEVATION
scale1:100
EXISTINGRIGHT-SIDE (NORTH)ELEVATION
scale1:100
PROPOSEDGROUND
FLOORPLAN
scale1:100
PROPOSEDFIRST FLOORPLAN
scale1:50
3xVeluxrooflight 780x1180GGLM06
Hiptogable
Rooftilesto matchexisting
PROPOSEDFRONT ELEVATION
scale1:100
PROPOSEDLEFT-SIDE (SOUTH)ELEVATION
scale1:100
PROPOSEDREAR ELEVATION
scale1:100
PROPOSEDRIGHT-SIDE (NORTH)ELEVATION
scale1:100
Newdormer
PROPOSED ROOFPLAN
scale1:100
3xVeluxrooflight 780x1180GGLM06
PROPOSED SECTIONAA
PROPOSED SECTIONBB
scale1:100
Triplejoistsunder dormercheek
HDHeatdetector
SDSmokedetector
TrimmerD-3No.200x50SW -Refertoengineersnotes
Lintelover-2No.200x50sw
SeeDetailfor SoundInsulation
175x50sw floorjoists @300c/c
TrimmerD-2No.150x50SW -Refertoengineersnotes
Ridge1-2No.150x50sw 100x100 swpost
BeamF-152UC23-Referto engineersnotes
3xVeluxrooflight 780x1180GGLM06 -Doubleuprafters
175x50sw ceilingjoists @400c/c
Padstones: 300x100x150dpmassconcretepadstone
Lintelover-2No.200x50sw
TrimmerE3No.200x50SW-Refer toengineersnotes
DormersWall:
SeeDetailforConstruction -toachieveMin.UValueof 0.28W/m2K
notes
175x50sw floorjoists @300c/c
Detail2-Referto engineersnotes
See
Ridge2-152UC37 -Refertoengineersnotes
MechanicalExtraction toexternalwall 15l/sonoverruntimer
175x50swfloor joists@300c/c
BeamF-152UC23 -Referto engineersnotes
175x50swfloorjoists@200c/c
Detail1-Referto engineersnotes
PROPOSEDGROUND
BeamH-152UC23Refertoengineersnotes
3No.200x50SW -Referto engineers notes
TrimmerA-FlitchBeam 2No.150x50+150x12 -Seeengineersnotes
TrimmerJ-3No.200x50SWRefertoengineersnotes
Stud/purlinwall100x50studs @400c/c
PROPOSEDFIRST FLOORPLAN
scale1:50
Ridge2-152UC37 -Refertoengineersnotes
Ventilationtilestobeinstalled above&belowVeluxwindows toallowcrossventilation
50mmCelotexBetween&70mmCelotex BelowExistingRafterswith25mmBatten &12.5mmPlasterboardtoAchieveMin.U Valueof0.18W/m2K
TrimmerA-FlitchBeam 2No.150x50+150x12 -Seeengineersnotes
Stud/purlinwall-100x50studs @400c/cwithM10bolt connectiontoeachrafter
SoundInsulation/thermaInsulationto continueintoeavesstoragearea
BeamH-152UC23-Refer toengineersnotes
Newstaircase-Min.2.0head clearancewithamin.42Ø° -seenewstaircasenotes
50mmClearVoidRequiredabove InsulationforCrossVentilation
Ridgeventtilestoallowcrossventilation equivalentto25mmContinuousStrip Rubbermembrane finishorGRP
LateralRestraintstraps betweenroofandwalls
22mmT&GMoisture ResistantChipboard
NewFloorJoists 175X50SW@300mmc/c
SoundInsulation -SeeDetail
DuetoBinderRemovalstrapexisting ceilingjoiststonewfloorjoists
Undersideofstairstoachieve30min. Fireresistance(x2Layersof plasterboard&SkimCoat)
PROPOSEDSECTIONAA
scale1:50
175x50swceilingjoists@400c/cwith firringLaidtoFall(1:60)torear
25mmVentilationGap &InsectMesh 120mmCelotexBetween &50mmCelotexBelow FlatRoofJoists-all toachieve0.16W/m2K
TimberLinteloverWindow -Min.2off200x50SW
DormersWall: SeenotesforConstruction -toachieveMin.UValueof 0.27W/m2K 90mmKnaufEarthwool FrameThermSlab32 BetweenStuds
TrimmerE-3No.200x50SW -Refertoengineersnotes
300mmWIDEVERTICALDPC SHEETTOCOVEREXPOSED EXTERNALINSULATION CORNERS.
115mmFullfill insulationwith10mm cavitybetween insulationandblockwk
2.WALLS NOTE; EXTERNALFINISHESTOEXTENSIONAND NEWWINDOWTOBEAPPROVEDBY HAMPSTEADGARDENSVBVBTRUST.
STRUCTURALENGINEER(REFERTODWGS.18918/01AND02) 600mmwd,deeptrenchmassconcretefoundation.1500mmdeep, subjecttoB.C.Oinspectionandtosuitsiteconditions. Caviteswalls2no.coursesbelowgroundleveltobeformfromconcrete blockwork.Cavityfillto225mmbelowdpclevel. 1.FOUNDATIONS
325mmBLOCK,CAVITY&BLOCKWITHRENDERFINISH FULLFILLCAVITYWALLINSULATION-EXTENSION
TotalUvalue0.15W/m²K.
325mmo/aCavitywallwithfullfillinsulation.
Constructiontobelaidatthecentreofconcretefoundationandcomprising; 13mmGryproclightweightplasterinternalfinish:11mmGyprocThistle Hardwallbackgroundplasterwith2mmThistleMulti-Finishplasteror 12.5mmplasterboardondabswithskimcoat.DecoratetoClients specification.
100mmblockworkinnerleaf,strength:7.3N/mm² 125mmcavitywith 115mmCelotexTherrmaClass21fullfillwallinsulationboardheldbackto innerskinofblockwork.
FAN ASSISTED FLUE
STAIFIXWALLSTARTERSYSTEMBYANCON (0REQUALAPPROVED)ASPER STRUCTURALENG.SPECIFICATIONS
WHITEPAINTEDRENDEREDBLOCKWORK (U-VALUEOFWALLS=0.15W/m2K)TOMATCH EXISTINGRENDERANDAPPROVEDBY HAMPSTEADGARDENSUBURBANTRUST
300mmMINVERTICALDPCTO EXTERNALCORNERSOF INSULATIONTOAVOIDGAPS
GAS WALL BOILER
NEWKITCHENLAYOUTAS PERKITCHENSUPPLIERS
extgsteelbeam(boxframe)retained
existingChimney&wallover
UNDERFLOORKITCHEN EXTRACTDUCTROUTE
EXISTINGSTRUCTUREPOSTSTO REMAIN.REFERTOSTRUCTURAL ENGINEERDETAILS
CAVITIESOFNEWEXTENSIONTO BECONTINUOUSWITHEXISTING WALLCAVITIES
NEW600mmwdx1500MMdp(min.)MASS CONCRETEFOOTINGASPERSTRUCTURAL ENGINEERSSPECS(REFERTOSTRUCTURAL ENG.DWG18918/01FORDETAILS)
TRENCHFOOTINGSTOPPEDTOALLOWSPACE FORKITCHENEXTRACTORDUCT (REFERTOSTRUCTURALENG.DWG1891/01: SECTIONC-CFORDETAILS)
PROPOSED4PANEL,CRITTALLSTYLE
STEELDOUBLE-GLAZEDWINDOW WITHTIMBER-SUBFRAME,SUBJECT TOHAMPSTEADGARDENSUBURBAN TRUSTAPPROVAL(U-VALUE1.40 W/m2K)
REFERTODWGBR-501&502
THERMALAND30MINFR CAVITYCLOSERSPROVIDED ATWINDOWSIDES,MINERAL WOOLCAVITYSOCKSUSED FORWALLHEADCAVITIES
300mmMINVERTICALDPCTO EXTERNALCORNERSOF INSULATIONTOAVOIDGAPS
NEWTRADITIONALCASTIRON DOWNPIPETODRAINWATER FROMNEWFLATROOFAND CONNECTEDTOEXISTINGSW DRAINSORSOAKAWAY
EXISTINGWOODEN DECKTOREMAIN
(10mmMINCAVITYSPACEBETWEENFACEOFINSULATION& BLOCK)
Note;300mmcornerstripverticalDPCTOEXPOSEDEXTERNAL CORNERSTOINSULATION,BONDEDTOBOARDS 100mmblockworkOuterleaf,strength:7.3N/mm² 20mm3nocoatsand:cementrendertomatchexistingandsubjectto HampsteadGardenSuburbanTrustapproval.
StainlesssteelwalltiestoBS1243egAnconStaifixRTtype2orsimilar approved,spacedat600mmc/chorizontallyand450mmc/cverticallyina squarepattern[notstaggered]withinsulationretainers.Atallopeningsin walls&atmovementjoints,tiestobeat225mmverticalc/c.
Allowfor2alternativecourseofweepholesatmax900mmctsfor drainagefromcavitytraytocavitywallstonewextension.
AllowforRytons(orsimilarapproved)weepholeductsbuilt-inevery4th perpendatdpclevelandatwindowanddoorheads.Periscopicventsfor underfloorventilationat1.8maxc/c.Cavitytobebeclearofdebris.Stop cavityfillmin225mmbelowbaseDPC.
BrickandblockworkmortaraboveDPCleveltobe1:5cement/sand, colourtomatchedbyexisting.DPCataminimumof150mmaboveFFL, lappedontoexistingDPCbyminimum100mm.Brickworktobeincluded underDPClevelandinaccordancewithstructuralengineers specifications.
STEELBEAMS
203x203x46UKC+10mmtopplateweldedtotopflange.Continuous blockingtimberboltedthroughwebofbeam.(REFERTO STRUCTURALENGINEERSDWG.18918FORDETAILS)
NOTE-Responsibilityisnotacceptedfor errorsmadebyothersinscalingfromthis drawing.Allconstructioninformationshould betakenfromfigureddimensionsonly
Existingdownpipe flowsdownonto newroof
Brickonedgetomatchexisting brickquions,overcreasedtiling subjecttoagreementwithHGS trust
Newwarmflatroofsystem(Referto dwg.7788BR-402forbuild-upofroof)
Newbrickworktomatchexistingbrickquions
DashedoutlinedepictingcavitytrayoverCG 90/100Catniclintel(asspecifiedbySE) withmin.150mmendbearings,innewwall extension,withweepholesat450mmc/c
Bellcastrenderstopbeadtopreventwater accumulationinoutdoorrender
WINDOWSANDDOORS
ALLEXISTINGWINDOWS&DOORSTOBEREMOVED,OPENINGSMADEGOOD.
Proposednewkitchen3noSTEELcasementwindows,includingopeningtoplightsmusthave traditionalbutthinges,orstandardprojectinghingesforsomesteelcasements,paintedwindowto matchexisting.
Framestobefittedintraditionalhardwoodsubframe,paintedwindowtomatchexisting
12mmFactorysealeddoubleglazedpanestohaveArgongasfilledsealedcavityalltospecialist manufacturersspecificationandtoclientsapproval.
GLAZINGBARWITH12mmDOUBLEGLAZEDUNITTOHAVESILICONE'PUTTY'GLAZED
NOTE;ALLNEWWINDOWSTOBECONFIRMEDANDAPPROVEDBYCLIENTPRIORTO ORDERING
Toughened/laminatedglasstoBS6206tobeusedwherewindowglazingislessthan800mmabove internal/externalfloorlevelgenerally.
WindowstoprovideaverageUvalueof1.40w/m²Korbetter. KitchenwindowshouldnotbefittedwithVISIBLETRICKLEVENTS.
Standardnote;Windowskitchenareatohaveeithertrickleventilatorsorasimilaropeningposition toprovidebackgroundventilationtoachieve8000sqmmforhabitableroomsand2500sqmmfor non-habitablerooms.
Allhabitableroomstohaveopeninglightstogiveclearopeningof5%floorarea. AllGlazingtowindowsanddoorstobeincompliancewithBuildingRegulationsApprovedDocument PartK.
NEWCRITTALL-STYLESTEELWINDOWSSUBJECTTOAPPROVALFROMHAMPSTEAD GARDENSUBURBANTRUST.
DRAINAGE&PLUMBING
AllplumbingtocomplywithrelevantBritishStandardformaterialproductschosen.S&Vpipestobe 110mmdiameterUPVC,S&VP>SoilandVentpipetoterminate900mmaboveflatrooflevel. HeadofVPtobefittedwithweatherproofterminalonflatroof.Roofcoveringtobedressedaround terminalinaccordancewithmanufacturersinstructions.Soilpipetoventtofreeairattheheadof thedrainrun.Soil&Ventpipegenerally110mmdiawithroddingeyeatfloorlevel.Allwaste pipeworktobeinPVCUgenerallycomprising:Wastepipessizes.
75mmdeepsealtrapstoallappliances. 32mmdiabasinwastetomax1700mmlength. 40mmdiabasin/sinkwastefor1700upto3000mm. 40mmdiashowerandsinktomax3000mm. 50mmdiashowerandsinkfor3000mmupto4000mmlength. 102mmdiaWC'sP,S,or,Qtrapwithmin50mmwaterseal. AlldrainagetobeventedinaccordancewithBS5572.Antisyphontrapstobeusedwhere recommendedunventilatedbranchpipeslengthsareexceeded.Wastestohaveroddingaccessto alljunctionsandbends.Overflowstobe15mmdiatoagreedlocations. Existingexternalgullyremovedandreplacedwithdoubletrapsealinternalgullywithwastepipe sealtogully.wastepipesfittedwithanti-syphontraps
BRANCHESATTHEBASEOFSTACKS
Forsingledwellingsuptothreestoreyshigh,thedistancebetweenthecentrelineofthelowest branchconnectionand theinvertoftheSoilPipedrainshouldbeatleast450mm.(min) Formulti-storeysystemsuptofivestoreyshigh,theminimumdistanceshouldbe740mm Forsystemshigherthanfivefloorsnoconnectionsarepermissibleatgroundfloorlevel.Where thisoccursaseparate stubstackshouldbeprovidedtoservethegroundfloororindividualappliancesshouldhavetheir ownseparateconnectiontothebuildingdrain.
NOTE-Responsibilityisnotacceptedfor errorsmadebyothersinscalingfromthis drawing.Allconstructioninformationshould betakenfromfigureddimensionsonly 0 1m Scale1:50 2m 0.5
NOTE; Newbrickworktomatchbrickquions ingeneral.
AlltoHempsteadGardenSuburbTrustapproval
Newtraditioncastirondownpipeand socketswithblackcastironheritage hopper,alltomatchexisting,todrain waterfromnewflatroofandsubject toHGStrustapproval
Periscopicairventsatmax.2200mm centres,toventilateunder-floorvoidand tomatchwhitecolourofextgrender. Ventstoppedwithcavitytrays.
ConcretelintelasperSEdesign
220mmx90mmexternalwallcowled ventconnectedtounderfloorkitchen extractorductasspecifiedbykitchen supplier.Colortomatchwallrender.
DPCmin.150mmabove finishedgroundlevel
Massconcretetrenchfootingas perstructuralengineersspecs.
NewdoubleglazedCrittallstyle,4panel, steelwindowwithtimbersub-frameto matchexisting.
AlltoHampsteadGardenSuburbTrust approval.Reftodwg7788BR-501502
PROPOSEDWEST(REAR)ELEVATON
Scale1:50
BENDSATTHEBASEOFSTACKS
Bendsatthebaseofverticalstacksshouldbeoflongradiusandhaveaminimumcentreline radiusof200mmona110mmnominalsizestack.
ROOFDRAINAGE
RainwatergoodstobeBLACKcastirontomatchexisting,laidto1:350fallwith68mmdiadown pipes.Allowreplacingallexistingguttersifdeemnecessary.ConfirmwithClient flatroofgulliestonewroofandtodrainthroughinsulatedscupperpipesanddrainintohopper.
15.0LEADWORK-GENERALLY
Allleadworktoroofs,parapetsandguttersetc.tobeinfullaccordance&complywithLeadSheetAssociation currentCodeofPracticeandrecommendeddetails-LDA/LSAPUBLISHEDGUIDELINES
Providecode4leadflashings(unlessstatedotherwise)tosurroundallopeningsintheroofstructureasrequired andtobesteppedaroundbrickworkwherenecessaryalltoprovidemin.150mmcoverwithleadsoakersunder asrequiredallasrecommendedbytheleadassociationhandbook
NOTE-Responsibilityisnotacceptedfor errorsmadebyothersinscalingfromthis drawing.Allconstructioninformationshould betakenfromfigureddimensionsonly
Existingdownpipe flowsontonew flatroof
Chuteoutletlinedwith code4leadflashing
Bellcastrenderstop beadtoprevent wateraccumulationin outdoorrender
Newblacktraditionalcastiron flat-backhopperheadand downpipewithsocketjoints, tomatchextganddraininto extgdrainsorsoakaway
DPCmin.150mmabove finishedgroundlevel
Existingassumedfooting
4no.450mmlongdowel barsinsertedbetween existingfootingandnew concretefoundationasper engineersdesign
Massconcretetrenchfootingas perstructuralengineersspecs.
Newwarmflatroofsystem(Referto dwg.7788BR-402forbuild-upofroof)
Brickonedgetomatch existingbrickquoinsto agreementwithHGStrust
New325mmInsulatedcavitywall (Refertodwg.7788BR-402for build-up)
Newwarmflatroofsystem (Refertodwg.7788BR-402 forbuild-upofroof)
Brickonedgetomatch qouinorsubjectto agreementwithHGStrust
Existingdownpipe flowsontonew flatroof
KEYPLAN
Scale1:100
Scale1:100 0 5m 1
Periscopicairventsatmax. 2200mmcentrestoventilate under-floorvoidandtomatchcolour ofextgwhiterender.Ventstopped withcavitytrays.
PROPOSEDNORTH-SIDEELEVATION
Scale1:50
Bellcastrenderstop beadtoprevent wateraccumulationin outdoorrender
Periscopicairventsatmax. 2200mmcentrestoventilate under-floorvoidandtomatch colourofextgwhiterender. Ventstoppedwithcaviytrays
DPCmin.150mmabove finishedgroundlevel
Existingassumedfooting
4no.450mmlongdowel barsinsertedbetween existingfootingandnew concretefoundationasper engineersdesign
Massconcretetrenchfootingas perstructuralengineersspecs.
PROPOSEDSOUTH-SIDEELEVATION
Scale1:50
NOTE-Responsibilityisnotacceptedfor errorsmadebyothersinscalingfromthis drawing.Allconstructioninformationshould betakenfromfigureddimensionsonly
DECKLEVEL
DECKLEVEL
ExistingcavitywithnewCavitytray,min150 highupstand,withweepholesat450cts
U-valueofnewwarmflat roofsystem=0.15W/m2K [Refertodetail1]
Brickonedgetomatch quoins&subjectto agreementwithHGStrust
U-valueof325mmInsulated cavitywall=0.15W/m2K withwhitepaintedrendered blockworktomatchexisting renderandsubjectedtoHGS trustapproval
U-valueofnewwindow= 1.40W/m2K 4panel,double-glazed Crittallstylesteelwindow withtimbersub-frame subjecttoHGStrust approval refertodrawingno 7788BR-501&502
CreasingTillCill refertodetail2
90mmextractorducting cappedoffwithexternal wallcowledventon plinthexterior,colour tomatchwallrender
DPCmin.150mmabove finishedgroundlevel
EXTERNALGL
CG90/100Catnic insulatedlintel orequalapproved,min 150mmendbearing
12.5mm Moisture-resistant plasterboard
13mmGyproc lightweightplasterfinish
Newworktop bykitchen supplier
3noexistingsteel beamsexposed
35mmmin.drypackbtwn existingmasonryandnew steelbeam
203x203x46UKC+10mm topplateweldedtotop flange.Continuousblocking timberboltedthroughwebof beam.(Refertostructural engineersdwg.18918/02: SectionA-Afordetails)
DD780BKCaple appliances-Induction downdraftextractorin black-dimensionsTBCin existingkitchenisland
75mmconcretescreed with25mmfloorfinishesto matchexisting
100mmCelotexGA4000 insulationon1200Gauge visqueenpolythenedpmslab
Existinggroundfloor structureretained
U-valueof150mmdpnew beam&blockfloor=0.18 W/m2K
Massconcrete trenchfootingseenin elevationas perstructural engineersspecs.
Verticalelbowjoints connectingductsatangles
220x90mmrectangularflatduct connectedtoInduction downdraftextractorbykitchen supplier
Existingassumedfooting
SECTIONA-A
Scale1:20
Code4leadflashing on20x150mm insulationupstand
150mmCelotexXR4000 flatroofinsulation
3layerbuiltupfelt roofingsystem
DPCcavitytraycutinto existingwalldraininginto weepholesat450mmc/c
New50x150C24flatrooftimber joistsat400mmc/cwithtimber firringscuttofallmin1:40
12.5mmGyprocmoisture-resistanttaperededgeplasterboard
DPCcavitytrayonCG 90/100Catniclintel
Bellcastrender stopbead
18mmminOSBClass3 decking,screweddown ontreated50x150mm cuttimberfirrings(min 15mmtaper)
DETAIL1(Proposedwarmflatroom)
Scale1:10
4pane,double-glazed, crittall-style,steel windowwithtimber sub-framesubjectto HGSapproval
30 hwortreatedsw timbercilltosuit creasetileandto matchexisting
Creasetiling setinmortar
DETAIL2
Scale1:5
New202x202x46UKC+ 10mmthktopplatewith continuousblockingtimber boltedthroughwebofbeam
NOTE-Responsibilityisnotacceptedfor errorsmadebyothersinscalingfromthis drawing.Allconstructioninformationshould betakenfromfigureddimensionsonly BUILDINGREGULATIONS
Hardwoodsub-frameaccording toHGSTrequirement
Insulatedcavitycloser
20mmexternalrendertomatch existingwithmasticsealantto frame
Glazingbar
Detail3[Refertodwg.7788BR-502]
Creasedtileexternalcilltomatchextg
12mmdouble-glazingasperHampstead GardenSuburbTrustconditionswith u-value=1.9W/m2K(Refertodwg.7788 BR-502forglazingdetails)
Windowbutthingesas perHGStrustconditions
325mmblockcavitywall
CG90/100catniclintelmin 150mmendbearingwithDPC oversub-frame
Crittall-'Homelight plus'windowto match existingwindow
Double-glazedunits withglazingbars. Finishtomatch existing
W1 W2 W3
Timber sub-frame,to matchcolour ofexisting
Detail1[Refertodwg. 7788BR-502]
EXAMPLEOFEXISTING CRITTALLSTLEWINDOW TOREPLICATE
NOTE:
-NewgalvanizedCrittall,opening casementwindows,includingtop lightsmusthavetraditionalbutt hinges,orstandardprojecting hingesforsteelcasements.Friction hingesmustnotbeused. -Doubleglazedunitsmustbeamax. overalldepthof12mm(4mmglass4mmgap-4mmglass).Internal spacersmustmatchcolourofframe. Referto7788BR-502forglazing bardetails.
-Windowsshouldnotbefittedwith visibletricklevents.
Theabovespecificationstobein accordancewithHampsteadGarden Suburbtrustandapprovedpriorto ordering.
Standardwindowu-value=1.4 W/m2K.U-valueofchosenCrittall HomelightPluswindow=1.9W/m2K duetorelaxationofHGStrustby BarnetcouncilBuildingcontrol.
12mmdouble-glazedwindow (RefertoGlazingbardetailon dwg.7788BR-502fordetails)
WindowFrameLine
Timbersub-Frame,finishto matchexisting(Refertodwg. 7788BR-502fordetails)
Detail2[Refertodwg. 7788BR-502]
Graniteworktopinsertinto windowcill Timbersub-ramefinishto matchexisting(Refertodwg. 7788BR-502fordetails)
Creasingtiletomatchextg.
NOTE-Responsibilityisnotacceptedfor errorsmadebyothersinscalingfromthis drawing.Allconstructioninformationshould betakenfromfigureddimensionsonly
BUILDINGREGULATIONS
Newwarmflatroofsystem with0.15W/m2Ku-value.
Brickonedgetomatchbrickwork ofexistingqouinorsubjectto agreementwithHGStrust
NEWPARAPET
Bellcastrenderstopbeadto preventwateraccumulationin outdoorrender
Brickonedgetomatchexistingbrick quions,overcreasedtilingsubject toagreementwithHGStrust
Optionaloverflowpipe
Dashedoutlinedepicting cavitytrayoverCG
90/100Catniclintel(as specifiedbySE)with min.150mmend bearingsinnewwall extension,withweep holesat450mmc/c
Periscopicairventstoventilate underfloorvoidsandtomatch colourofextg.whiteexternalrender
DPCmin.150mmabove finishedgroundlevel
Creasingtilecilltomatchextg
Newtraditionalcastirondownpipe andsocketswithblackcastiron heritagehopper,alltomatchexisting, todrainwaterfromnewflatroofand subjecttoHGStrustapproval
Newwarmflatroofsystem with0.15W/m2Ku-value
NEWPARAPET
Bellcastrenderstop beadtopreventwater accumulationinoutdoor render
Newwhiteexternalwall rendertomatchexisting
Scale1:20
NOTE: BRICKWORK/TILING:Any brickworkortiledetailingtothe existingwindowsurroundmust bereplicatedfaithfullyasthe originaldetailwhennew windowsarebeinginstalled.
Scale1:20
NOTE:
AsperHampsteadGardenSuburbTrustconditions
MORTAR:Anypointingworkmustbeapprovedbythetrust,thejointmustbe flushorslightlyrecessedandofcolourtomatchmortarelsewhereonthe house.Donotuseweatherstruckorbuckethandlejoint.Generallythe followingmortarmixisacceptable:1partOPC(Ordinaryportlandcement:1 partfreshHydratedlime:6partsaggregatemadeupof3partscoarseand3 partsfinesand-allaggregatemustbewashed,donotuseordinaryunwashed softbuilderssand).Mortarmustnotbeusedtoowetandmustnotbe smearedoverthearrisorfaceofthebricks.Jointsshouldbeslightlybrushed backtoexposetheaggregate.Rakingoutmustbebyhandtoolsandtoa depthofbetween15mm(absolutemin.)to25mmandmustbetothewhole width/heightofthejoint.NB:ItisimportantthattheHydratedlimeisused freshfromunopenedpacks-donotuselimefrompackswhichhavebeen openedmorethan2/3days.
RENDER:ArendersampleshouldbepreparedinaccordancewithTrust guidance.Asamplemustbeapprovedbythetrustinwritingbeforeworksto therenderbegin.
Optionalbestpractice: 75mmØscupperpipe toactasoverflowpipe setat50mmabovefelt finishasperNHBC 7.1.12detail
Brickonedgetomatchbrickwork ofexistingqouinorsubjectto agreementwithHGStrust
Chuteoutletlinedwith code4leadflashing
Newblacktraditionalcastiron flat-backhopperheadand downpipewithsocketjoints,to matchextganddrainintoextg drainsorsoakaway
Bellcastrenderstop beadtoprevent wateraccumulation inoutdoorrender
Periscopicairventstoventilate underfloorvoidsandtomatch colourofextg.whiteexternalrender
DPCmin.150mmabove finishedgroundlevel
Scale1:20
Scale1:50
NOTE-Responsibilityisnotacceptedfor errorsmadebyothersinscalingfromthis drawing.Allconstructioninformationshould betakenfromfigureddimensionsonly BUILDINGREGULATIONS
ELEV1
Scale1:10
DPCcavitytray
Chuteoutletlinewithcode 4leadflashingtocomply withLDA/LSAguidelines
Brickonedgetomatchbrickworkofextg. qouinsubjecttoHGStrustapproval 185
New68mmblackcastiron downpipewithsocket jointsandflutedhopper headtomatchextg.
Insulatedcavitycloser
DPCcavitytray
Creasetilinglaidon topofcavitywallto matchexisting 50
Existingdownpipe flowsdownonto newroof
Slatecavity closerlaidto fallonmortar bed
Rainwaterdownpipe fitwithnewshoe
150mmCelotexXR4000flatroofinsulation.18mmclass3 OSBdeckingorWBPplywooddecktoBSEN636topped with3layerbuiltupfeltsystem
Dashedoutlineofcavitytrayinexistingwall withweepholesat450mmc/c
Code4 leadflashingupstandtocomply withLDA/LSAguidelines
100
Brickonedgetomatch brickworkofextg.qouin subjecttoHGStrustapproval
Code4leadflashingon 20x150mminsulationupstand
Extg.downpipe todraininto chuteoutlet linedwithcode 4leadflashing
Dashedlineindicates existingboxframebeam 50
75mmØ optional overflowpipe, 50mmabove finish
Creasetiling laidontopof cavitywallto matchexisting
DPCcavitytray cutintoexisting walldraining intoweepholes at450mmc/c
Bellcastrenderstopbead
325mmblockworkcavitywallwith20mmexternalrenderto matchexistingandsubjectedtoHGStrustapproval
DPCcavitytrayonCG 90/100Catniclintel min.150endbearing
SECTIONA-A
Scale1:10
New202x202x46UKC+10mmthktop platewithcontinuousblockingtimber boltedthroughwebofbeamsupported on450x300x215padstones
3noexistingsteelbeamsexposed
Existingcavitywallwithnew Cavitytray,min150high upstand,withweepholesat 450cts
35mmmin.drypack btwnexistingmasonry andnewsteelbeam
SECTIONB-B
Scale1:10
Optionalbestpractice: 75mmØscupperpipe toactasoverflowpipe setat50mmabovefelt finishasperNHBC 7.1.12detail
Newblacktraditionalcastironhopperhead anddownpipetomatchextganddraininto extgdrainsorsoakaway
KEPLAN
Scale1:50
Scale1:50 2m 0.5
RefertoNOTESondwg.7788 BR-503formortarspecsasper HampsteadGardenSuburbTrust conditions.
NOTE-Responsibilityisnotacceptedfor errorsmadebyothersinscalingfromthis drawing.Allconstructioninformationshould betakenfromfigureddimensionsonly
