New buildings - dwellings L1A

Exposed element

Performance U values
for use in the
Notional dwelling
 L1 A
W/m2K

U value requirements
to achieve a
20-28% improvement
in energy
performance standards
W/m2K
20   -   28%

 Roofs

0.16

between 0.16 - 0.12

 Walls

0.35

between 0.28 - 0.25

 Floors

0.25

between 0.20 - 0.18

 Windows/doors

2.00