Technical Booklet F1 Conservation of Fuel and Power in Dwellings·Page 34·Table 2.3
U-values for party walls
Table specifying U-values for different types of party walls between dwellings: solid walls (0.00 W/m².K), unfilled cavities with effective edge sealing (0.20 W/m².K), and fully filled cavities with effective edge sealing (0.00 W/m².K).
Type of party wall(1) | U-value
Solid | 0.00
Unfilled cavity with effective edge sealing around all exposed edges and in line with insulation layers in abutting elements | 0.20
Fully filled cavity with effective edge sealing around all exposed edges and in line with insulation layers in abutting elements | 0.00
Note: (1) These U-values only apply to the separating walls between dwellings and not to thermal elements such as walls separating a dwelling from the unheated common area in buildings with multiple dwellings.
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