Flat Roof Flashing Details

Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs.

Flat roof flashing details.

Roofs peel off from the edges so it is critical to hold them tight with the roof deck sealed on the outside we turn to flashing the edges with metal and membranes metal drip edge flashing image details roofing wrb flashing. M60 rubrpoly flashing sheets fields roof membrane sheets a 30 sq min 1 5 lb to 4 lb lead or 16 oz copper flashing adhered onto finished roof with m300 rubrmastic. What typical detailing methods are used to seal flat roof penetrations. Lead flashing maximum length.

But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. Small penetrations often do not require curbs. The preferred method of flashing penetrations through flat roofs involves the construction of a curb around the opening. This could mean flat roofs may not raise the same red flags they used to.

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. Proper roof wall flashing example to install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width. Flat roofs are hard to replace. Typical methods include banding pitch pockets and cover flashings.

Flashing is installed to surround roof features such as vents chimneys and skylights. Flat roof flashing this could virtually be any type of flat roof the upstand of the flat roof covering is overlapped by the drop of the flashing. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. Prime top surface of metal flashing with m400 rubrprime and install m60 rubrpoly flashing sheets.

With sloped roofs the general approach is to attach the flashing before the roofing is installed. This drip edge flashing provides protection from water damage along the eaves and rake of a roof. Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer. Ideally this should be 150mm or a minimum of 75mm again common sense and exposure applies.