Boiler Flue Through Flat Roof

Condensing flue through cellar roof to above ground.

Boiler flue through flat roof. Flue passing through flat above and in void. Depending on design installation of a flue terminal would cost around 20 40. Any vertical flue joints if your flue is going through the roof for example must be bracketed with specific flue brackets every 800mm 1000mm. 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.

And there s a very good reason for this. Making a hole in any flat roof makes me nervous. Also at every joint. 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.

Fire and bbu flue through flat above. 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. Flat roofs do not present an installation problem as such but in practice they can be problematic due to pooling of water on them. Do you need planning permission for a boiler flue.