Flat Roof Vent Detail

What typical detailing methods are used to seal flat roof penetrations.

Flat roof vent detail.

Banding is typically used to seal soil vent pipes on single ply roofs such as fdt rhepanol pib and involves wrapping an unreinforced membrane around the pipe to a minimum height of 150mm an approved sealant is then applied to the top of the membrane. Having both will enable the cavity to breathe with cross ventilation. Any type of roof from tpo to epdm can be either hot or cold. Flat roof ventilation should be accomplished when you have equal amounts of air exhaust with air intake.

A cold roof or hot roof. Flat roof construction for residential. Choosing the correct ventilation solution for a flat roof will play an integral role in extending a structure s lifespan. Find all available details and drawings of vents for flat roofs in the format dxf pdf and dwg as downloads here.

Hot roofs have the roof deck then insulation then the roofing material. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. It s unavoidable that the thermal temperature in the roof space will bear the brunt of the heat generated in the living spaces below. How much ventilation does a flat roof need.

Typical methods include banding pitch pockets and cover flashings. It depends on where the insulation is installed. Roof vents need to be built tall for flat roofs because flat roofs drain water poorly and slowly compared to steep sloped roofs.