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Cladding Roll U Values
Pitched roof, metal clad double skin system
Prescribed U Value W/m2K
(England and Wales) Extensions, Renovation & Repair work:0.20
New build requirement could range between 0.16 and 0.14
(Republic of Ireland) 0.25
(Scotland, with boiler SEDBUK) 0.20
Thickness
mm | U Values
W/m2K
| | 180 | 0.25 | | 200(100+100) | 0.22 | | 220(120+100) | 0.20 | | 250(150+100) | 0.18 | | 280(180+100) | 0.16 |
The U values and thickness shown are based on SCI P312 using a rail & bracket spacer system. Sheeting rails spaced at 1800mmcentres. For other cladding systems a more complex calculation method must be adopted using a 3 dimensional modelling program. Confirmation of such U values should therefore be obtained from the specific cladding manufacturer.
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Rockwool Limited, Pencoed, Bridgend, CF35 6NY, UK
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