This depends on the thickness of wall block you decide to use. Please see the table below;
| 250mm x 1200mm x 250mm | Internal Load Bearing | 0.225 |
| 300mm x 1200mm x 250mm | Internal Party Wall | 0.224 |
| External | ||
| 300mm x 1200mm x 250mm | Standard wall block | 0.20 |
| 350mm x 1200mm x 250mm | Passive Standard | 0.15 |
| 400mm | Passive Gold | 0.12 |
| 450mm | Passive Platinum | 0.10 |
| Basement Block | ||
| 350mm x 1200mm x 250mm | Standard basement block | 0.20 |
| 400mm x 1200mm x 250mm | Passive Basement Block | 0.15 |