Sealing Flue Through Flat Roof

I am considering having one fitted but wanted to know whether it could be reliably done without a leak.

Sealing flue through flat roof.

Is it possible to have the flue of a combi boiler going through a flat roof. Quickview price 24 95 inc vat 29 94. Most installers or roofing contractors will use a slate piece or a metal or lead piece that fits onto a flat or pitched roof with a gromit where the flue pipe goes through. See how you can create a perfect seal around a pipe on a flat roof.

Quickview price 35 77. Some installers advise against it becuase they say it is tricky and prone to leaking damaging the boiler in the process. Watch our demonstrator use an innovative pipe boot that can be cut to size and fixed to the epdm membrane covering the flat. This flashing is used to provide a weatherproof seal where the flue passes through a tiled or slate roof.

Typical methods include banding pitch pockets and cover flashings. Comes with fixing kit. Masterflash epdm no 5. This flashing is suitable for sheet metal profiled roofs flat roofs boats and caravans.

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. 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. Visit our clearline nu lead flashing page or click on the picture for more details.

Boiler flue flashing products are typically used when installing a vertical flue kit through a flat or angled roof as it will provide a weather tight seal to the roof and stop any water leaking into the flue system.