Tempo:
Energy-efficient windows that come with double or preferably triple glazing and low-conductivity frames can provide significant energy savings. They should be installed with spray foam or sealant around the perimeter between the frame and the rough opening to reduce air leakage and water ingress. There should also be flexible membrane sub-sill flashing across the rough sill and extending at least 100 mm (4 in.) up the sides of the rough opening. The sill flashing should be sloped towards the exterior to prevent bulk water from entering the wall (Figure 11 on p. 42). Position the window in the rough opening so that the insulated glazing is in line with the wall insulation. In thick walls, the window should be placed close enough to the interior to allow heated room air to ‘wash’ the inner surface of the glass to prevent condensation and inwards from the exterior wall surface so that it is protected from rain and snow, yet near enough to the exterior so that flashings and membranes are not excessively large.
EXTERIOR DOORS Exterior doors, like windows, affect the appearance of a dwelling and are often selected on the basis of style and finish. Most manufactured exterior doors come as manufactured units pre-hung in their frames and ready for installation within a rough opening. Exterior doors are usually manufactured of wood, steel, plastic or fibreglass. Wood doors are normally solid, while other types consist of inner and outer structural panels filled with insulation and are more energy-efficient. However, wood doors have proven performance and a traditional appearance that have contributed to their popularity. Main doors should not be less than 45 mm (13⁄4 in.) thick. They should be at least 810 mm (32 in.) wide and 1.98 m (6 ft. 6 in.) high.
Nearly all doors are purchased and installed as complete manufactured systems (Figure 133). When custom doors are required, they must meet the same durability and performance requirements as manufactured units. In addition, some components may have to be milled prior to assembly and installation (refer to Chapter 16). 133 Pre-hung manufactured door head jamb hinge jamb lock jamb
pre-drilled lockset holes hinge threshold
Note: Exterior doors to have water-impermeable sill membrane and flashing
Weatherstripping is the primary line of defence against air leakage around doors. It should fit tightly and be effective, durable and easy to replace. It is good practice for doors to be protected by overhangs to limit exposure to wetting. Exterior doors should be installed with the same attention to sealing and flashing as windows.
EXTERIOR DOORS Exterior doors, like windows, affect the appearance of a dwelling and are often selected on the basis of style and finish. Most manufactured exterior doors come as manufactured units pre-hung in their frames and ready for installation within a rough opening. Exterior doors are usually manufactured of wood, steel, plastic or fibreglass. Wood doors are normally solid, while other types consist of inner and outer structural panels filled with insulation and are more energy-efficient. However, wood doors have proven performance and a traditional appearance that have contributed to their popularity. Main doors should not be less than 45 mm (13⁄4 in.) thick. They should be at least 810 mm (32 in.) wide and 1.98 m (6 ft. 6 in.) high.
Nearly all doors are purchased and installed as complete manufactured systems (Figure 133). When custom doors are required, they must meet the same durability and performance requirements as manufactured units. In addition, some components may have to be milled prior to assembly and installation (refer to Chapter 16). 133 Pre-hung manufactured door head jamb hinge jamb lock jamb
pre-drilled lockset holes hinge threshold
Note: Exterior doors to have water-impermeable sill membrane and flashing
Weatherstripping is the primary line of defence against air leakage around doors. It should fit tightly and be effective, durable and easy to replace. It is good practice for doors to be protected by overhangs to limit exposure to wetting. Exterior doors should be installed with the same attention to sealing and flashing as windows.
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