High Performance Partial Fill U Values
External masonry cavity walls - Partial fill, brick/block
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)
Internal finishes: (a) plaster (b) plasterboard on dabs Block density
Block type
Block λ | 750kg/m3
Aircrete
4N
0.160
W/mK | | Thikness
mm | a | b | | 60 | 0.32 | 0.31 | | 70 | 0.29 | 0.28 | | 80 | 0.27 | 0.26 | | 90 | 0.25 | 0.24 |
Construction: Render on 100mm 7N Aircrete block outer skin, cavity,
Rockwool High Performance Partial fill, 100mm 7N Aircrete block inner skin.
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