Tempo:
less than 25 mm (1 in.) long, and to wood frames penetrating at least 30 mm (13⁄16 in.) into solid wood. Resistance to forced entry extends beyond door hardware to the framing for the door as well. Solid blocking must be provided on both sides of the doorway at lock height between the jamb for the door and the structural framing so that the jambs resist spreading by force. Additional screws in the drywall around the doorframe will also strengthen resistance to forced entry. Doors conforming to the Harmonized Standard and Canadian Supplement meet these requirements.
SKYLIGHTS Skylights are windows designed and manufactured for installation in a roof assembly. They must be installed carefully because they are exposed to severe climatic conditions and their remote location makes them difficult to
maintain. Skylights must be securely attached to the roof framing and sealed to the air barrier system in the roof, at the walls of the skylight opening and at the ceiling. When the air barrier in a wood-frame building consists of polyethylene attached to the inside surface of the roof framing, the polyethylene must be extended up and sealed to the inside face of the skylight frame. When the air barrier is a membrane on the exterior of the roof sheathing, it should be sealed to the outside of the skylight frame and covered with a prefinished metal flashing to protect it from exposure to ultraviolet radiation, water, snow, ice and mechanical damage. Some skylight manufacturers supply step flashings specifically designed for their units and for a variety of roof slopes and finishes, which enables the installer to effectively integrate the skylight unit into the roof waterproofing system. Figure 135 shows a stepped base flashing for a skylight unit on a pitched roof.
135 Stepped flashing for skylight
prefinished steel step flashing; lap at corners by saddle flashing prefinished sheet-steel saddle rubberized asphalt sheet (self-sealing) base flashing turned up and over the curb
SKYLIGHTS Skylights are windows designed and manufactured for installation in a roof assembly. They must be installed carefully because they are exposed to severe climatic conditions and their remote location makes them difficult to
maintain. Skylights must be securely attached to the roof framing and sealed to the air barrier system in the roof, at the walls of the skylight opening and at the ceiling. When the air barrier in a wood-frame building consists of polyethylene attached to the inside surface of the roof framing, the polyethylene must be extended up and sealed to the inside face of the skylight frame. When the air barrier is a membrane on the exterior of the roof sheathing, it should be sealed to the outside of the skylight frame and covered with a prefinished metal flashing to protect it from exposure to ultraviolet radiation, water, snow, ice and mechanical damage. Some skylight manufacturers supply step flashings specifically designed for their units and for a variety of roof slopes and finishes, which enables the installer to effectively integrate the skylight unit into the roof waterproofing system. Figure 135 shows a stepped base flashing for a skylight unit on a pitched roof.
135 Stepped flashing for skylight
prefinished steel step flashing; lap at corners by saddle flashing prefinished sheet-steel saddle rubberized asphalt sheet (self-sealing) base flashing turned up and over the curb
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