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HardRock Roofing Board U Values
Warm flat roof, concrete deck
Prescribed U Value W/m2K
(England and Wales) Extensions: 0.20
Renovation & Repair work: 0.25
New build requirement could range between 0.20 and 0.18
(Republic of Ireland) 0.22
(Scotland, with boiler SEDBUK) 0.25
Thickness
mm | U Values
W/m2K | 150 | 0.25 | 180(85+95) | 0.20 | 190 (95+95) | 0.19 | 200 (95+105) | 0.18 | 223 (95+135) | 0.16 | 285 (135+150) | 0.13 |
Construction:Hardrock Dual Density roofing boards in combination
with mechanically fastened single ply membrane systems on screed
to falls on 150mm dense concrete deck.
Ceiling finish 16mm plaster.
Calculations assume that insulation and membrane are of the telescopic type.
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Rockwool Limited, Pencoed, Bridgend, CF35 6NY, UK
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