Table 6 Envelope construction components and materials
Component W/m2Ka | Climate zone | Materials | Thickness | Used U-Factorb | Recommended U-Factor |
|---|---|---|---|---|---|
Mass wall above grade U-factor | 1B | 1 cm plaster + 15 cm brick + 14 cm insulation (Rigid board) + 7 cm concrete + 5 cm stone | 42 cm | 0.216 | 0.22 |
2B | 1 cm plaster + 15 cm brick + 12 cm insulation (Rigid board) + 7 cm concrete + 5 cm stone | 40 cm | 0.26 | 0.3 | |
3B | 1 cm plaster + 15 cm brick + 12 cm insulation (Rigid board) + 7 cm concrete + 5 cm stone | 40 cm | 0.26 | 0.27 | |
Roof U-factor (continuous) | 1B | 2 cm cement tiles + 10 cm fine aggregate and normal concrete + water proofing rolls + 16 cm Insulation (Rigid board) + 27 cm reinforced concrete + 1 cm plaster + 2 cm gypsum board | 58 cm | 0.202 | 0.21 |
2B | 2 cm cement tiles + 10 cm fine aggregate and normal concrete + water proofing rolls + 17 cm Insulation (Rigid board) + 27 cm reinforced concrete + 1 cm plaster + 2 cm gypsum board | 59 cm | 0.191 | 0.20 | |
3B | 2 cm cement tiles + 10 cm fine aggregate and normal concrete + water proofing rolls + 17 cm Insulation (Rigid board) + 27 cm reinforced concrete + 1 cm plaster + 2 cm gypsum board | 59 cm | 0.191 | 0.19 | |
Slab U-factor | 1B, 2B, 3B | 1 cm tiles + 9 cm fine aggregate and normal concrete + 10 cm reinforced concrete + 12 cm Insulation (Rigid board) | 32 cm | 0.243 | 0.27 |
Roof solar reflectance |  | White-scheme colours | – | 0.8 | 0.7 |