Boiler Flue Through Flat Roof

There are maximum lengths the flue can be depending on the boiler.

Boiler flue through flat roof.

I am considering having one fitted but wanted to know whether it could be reliably done without a leak. Securing any joints with brackets will help to ensure your flue can withstand people banging a suitcase or accidentally knocking it without wobbling or coming loose. Is it possible to have the flue of a combi boiler going through a flat roof. Especially if it s not sealed properly.

Most modern boilers under 15 years old will have a round flue pipe with boilers older than that often having a square flue. 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. You see if you ve got a boiler in your attic and the flue goes through the roof there s a chance it could get bashed or pulled on accidentally when you re up there. You can get plume kits designed to direct the steam up and away from a horizontal flue but not to make a horizontal one into a vertical through a roof.

Depending on design installation of a flue terminal would cost around 20 40. Some installers advise against it becuase they say it is tricky and prone to leaking damaging the boiler in the process. 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. This flat roof penetration collar is suitable for use with the vertical flue terminal for the vaillant ecotec domestic and commercial boiler range s.

I very much doubt this would meet building regs. Flashing kits flashing plates and weather collars in the range can be made of sheet metal plastic or composite materials and. This flat roof penetration collar flashing enables you to create a watertight bond for flue holes cut through a flat roof. In some cases where building types and shapes differ you may have a vertical flue which exits through the roof of your property.