 |
| Flooring U-values |
Semi Detached House |
Perimeter Length
to Area Ratio |
U-Value
W/m²K |
| 1:1 |
0.25 |
| 0:9 |
0.25 |
| 0:8 |
0.25 |
| 0:7 |
0.24 |
| 0:6 |
0.23 |
| 0:5 |
0.23 |
| 0:4 |
0.21 |
| 0:3 |
0.20 |
| 0:2 |
0.17 |
| 0:1 |
0.12 |
|
The heat loss in a floor is greater at the exposed perimeter
edge of the floor. To calculate the U-Value, the exposed perimeter
edge to area ratio needs to be worked out e.g. — a 100m² area,
semi-detached house with 3 external walls of 10m each has a
perimeter edge to area ratio of 0.3 (i.e. 30m ÷ 100m² =
0.3) which, using Foil-Tec
Double,
gives a U-Value of 0.2 W/m²K. NB: The calculation method
used presumes the perimeter walls are insulated to 0.35 W/m²K.
|
