Sealing Flue Through Flat Roof

Applying two coats of elastomeric coating protects the roof from water and also insulates the material preventing loss of heat from inside the building.

Sealing flue through flat roof.

See how you can create a perfect seal around a pipe on a flat roof. 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. Typical methods include banding pitch pockets and cover flashings. Water cannot slide off flat roofs like sloped roofs but a simple solution exists to resolve this problem.

This is melted down using a gas bottle which welds the flue join to the flat tar roof. Watch our demonstrator use an innovative pipe boot that can be cut to size and fixed to the epdm membrane covering the flat. Waterproofing protects flat roofs when runoff cannot occur. Clearline nu lead flashing the clearline nu lead based flashing is an environmentally friendly lead free flashing providing a reliable water tight seal to any twin wall flue through tiled and slate roofs.

This is normal but the most important thing to remember here is that it won t seal if you do this while it s raining especially on a flat roof. An approved sealant is then applied to the top of the membrane upstand before it is tied off with a jubilee clip. Just knock up a lead slate and bed it to the roof using the same material the roof s covered with and make a collar for the flue to deflect water over the slate like on a soil pipe then seal with sani. That s because installers usually use a tar type tape to stick it.