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Rockwool Flexi - U Values
Cold timber frame - external cavity wall
Prescribed U Value W/m2K
(England and Wales) Extensions: 0.30
Renovation & Repair work: 0.35
New build requirement could range between 0.28 and 0.25
(Republic of Ireland) 0.27
(Scotland, with boiler SEDBUK ) 0.30
U Values (W/m2K)
Timber frame cavity wall, standard construction, insulation fully filling studs.
Internal finishes: (a) 1 layer plasterboard (b) 2 layers plasterboard
| Standard
Breather Membrane | | Tyvek 'Reflex'
Breather Membrane | | | Internal finish | a | b | a | b | Thickness
mm | | | | | | 90 | 0.41 | 0.40 | 0.36 | 0.35 | | 100 | 0.38 | 0.37 | 0.33 | 0.33 | | 120 | 0.33 | 0.32 | 0.29 | 0.29 | | 140 | 0.28 | 0.27 | 0.25 | 0.25 |
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Rockwool Limited, Pencoed, Bridgend, CF35 6NY, UK
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