Boiler Flue Through 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.

Boiler flue through flat roof.

Flashing kits flashing plates and weather collars in the range can be made of sheet metal plastic or composite materials and. 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. I am considering having one fitted but wanted to know whether it could be reliably done without a leak. All of our fixed boiler quotes include the flue that you require and any remedial works.

Most modern boilers under 15 years old will have a round flue pipe with boilers older than that often having a square flue. A flue terminal guard is used when the flue terminal is lower than 2m above the ground in an area where people could walk or when the flue comes up through a flat roof to which people have access. Especially if it s not sealed properly. Depending on design installation of a flue terminal would cost around 20 40.

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. 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. However if a vertical flue is badly fitted then yes you could have a leak on your hands. This flat roof penetration collar flashing enables you to create a watertight bond for flue holes cut through a flat roof.

There are maximum lengths the flue can be depending on the boiler. I very much doubt this would meet building regs. 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. Some installers advise against it becuase they say it is tricky and prone to leaking damaging the boiler in the process.