Cure It GRP - Warm Roof Specification; Part L Regulations Compliance

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Warm roof
2013 Part L regulation specication
2013 Part L Reg’s Specication
AGRProofcanbeeasilyconguredineitherawarmorcoldroofspecication.Forawarmroof,asubdeckisrstxedtothejoistsat300mm
centres. A vapour check and insulation sheet is then laid over the top. Insulation sheets can also be purchased with a vapour check adhered to
oneside,followinginsulationmanufacturer’sguidelinesforsatisfactorybondingandxing.
Thedeckingshouldthenbexedontopasitnormallywouldbe.Screwsshouldbeusedtoxtheboardstothejoists,theseshouldpenetrate
throughtheinsulationandintothejoistsbyatleast40mm.Itisimperativethatalllayersontheroofarepressedrmlytogetherandthatthere
are no gaps between any of the layers.
TheGRPshouldthenbelaminatedoverthetopoftheroof,theseroofswillusuallyrequirelargeredgetrimsizessuchasA250andB300.To
complywiththePartLRegulationsatthetimeofprinting,thefollowingspecicationwouldberequiredtoobtainthefollowing‘U’valueas
shown below.
12mm Ply Sub Deck
BasedonCelotexFR5000orequivalentlyspeciedinsulation*
U= 0.20 - 95mm
U= 0.18 - 105mm
U= 0.15 - 130mm
U= 0.13 - 160mm
Orequivalentlyspeciedinsulation
18mm T&G OSB3 Board
Cure It Glass Reinforced Laminate
*Basedonλ(lamba)valueof0.21fromCelotexFR50002012version
Warm roof application
Joist
Subdeck
Insulation
with vapour
check
18mm
OSB3 T&G
GRP laminate
A250 or B300 trim would
be applied to this edge
Decking Trim to be applied
Insulation with vapour check
Sub deck
Joist
Gutter
Fascia
GRP layer and bandage