Flat Roof Vent Detail

It s unavoidable that the thermal temperature in the roof space will bear the brunt of the heat generated in the living spaces below.

Flat roof vent detail.

Hot roofs have the roof deck then insulation then the roofing material. How much ventilation does a flat roof need. 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.

Alwitra flat roof details. Typical methods include banding pitch pockets and cover flashings. A cold roof or hot roof. Flat roof ventilation should be accomplished when you have equal amounts of air exhaust with air intake.

A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. What typical detailing methods are used to seal flat roof penetrations. 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.

Having both will enable the cavity to breathe with cross ventilation. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. 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.