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| How the insulation values of buildings will change | ||||
| U-value | in W/m2°C | |||
| Current value | 2002 | 2004 | After 2005 | |
| Roof | 0.25 | 0.2 | 0.16 | 0.16 |
| Ground floor | 0.45 | 0.3 | 0.25 | 0.22 |
| Exposed floor | 0.45 | 0.3 | 0.25 | 0.22 |
| Exposed walls | 0.45 | 0.35 | 0.3 | 0.25 |
| Windows, doors and rooflights | 3.3 | 2.2 | 2 | 1.8 |