Client Books Homestar - New Zealand Green Building Council - Page 47

BUILDING NEW OR RENOVATING… gn considerations will help ensure a healthy, high-performing home R SUN – is your home designed to make SHADING – generous eaves in the right place can let in n’s free heat and light? Ideally living areas more sun in winter, but reduce overheating in summer. orthern side and service areas (such aundry) on the south. Concentrate your ng on the northern side, with smaller uth to minimise heat loss. – materials such as a concrete floor WINDOWS – consider using double glazing with frames that are thermally broken, or made from PVC or wood (these perform better than standard aluminum frames). Window placement is also important for cross ventilation to cool the house in summer. ure the sun will release heat throughout nsulating the slab edge. e more the better. Ask your architect or aming can be thicker to accommodate Talk to a Homestar Assessor early in your building project – you can find one at homestar.org.nz ZONE 1 & 2 CODE BETTER BEST ROOF R 2.9 R 3.6 R 4.0 WALL R 1.9 R 2.4 R 2.6 FLOOR R 1.3 R 1.5 R 1.8 WINDOWS overhang A R 0.26 Double glazing with aluminium frames R 0.31 Thermally broken frames or low-e glass R 0.36 Double glazing with wood or PVC frame ZONE 3 BEST R 3.3 R 4.0 R 5.0 WALL overhang when building new BETTER ROOF D 0.2m CODE R 2.0 R 2.6 R 2.8 FLOOR R 1.3 R 1.8 R 1.9 WINDOWS R 0.31 Thermally broken frames or low-e glass R 0.36 Double glazing with wood or PVC frame R 0.48 Low-e double glazing with wood or PVC frame ZONE 1 ZONE 2 ZONE 3 Insulation: Homestar recommends higher than Building Code