Nature & Environment
Energy in buildings
...Aluminium (window frames) 2727 220 Steel wall ties 7900 17 Reinforced concrete (2% steel) 2400 2.5 Window glass 2600 1.05 Brickwork (outer leaf) 1700 0.77 Plaster (dense) 1300 0.57 Lightweight aggregate concrete 1400 0.57 Aerated concrete 600 0.18 Aerated concrete (lower density) 460 0.11 Timber (softwood) 500 0.13 (Source: Building Regulations Part L2, ODPM, 2001 and...