Flue Through Roof Regulations

The above points only really apply for flues that exit the home horizontally through a wall but that doesn t mean there aren t any regulations if your boiler flue goes vertically out of the roof.

Flue through roof regulations. A vertical flue looks similar to a very small chimney and can be seen spouting out steam when the heating is on. If the flue passes through bedrooms it should be boxed in with an inspection hatch situated in a specific place. How high does the flue have to go. Above the roof surface with a listed cap or listed roof assembly.

The building regulations identify the zone for this but any of these dimensions may need to be increased where there is exposure to. The twin wall flue must pass through the ceilings and roof. G2427 6 5 503 6 6 gas vent termination. 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 flue runs up through your house and exits through your roof. In the loft it will likely need some type of mesh protection. A roof or any big object really creates eddies swirling patters of air and areas of high and low pressure which can reduce draw. And there s a very good reason for this.

In this case the flue goes upwards and then out through the roof. As they pass through the home up to the roof vertical flues are either boarded over or housed inside a cabinet. That means that it will suck air through from your stove which also helps it to burn well. A gas vent shall terminate in accordance with one of the following.

How far this is will depend on the size of your boiler but is typically between 30 60cm above below or to the side of an opening. Vertical flue joints in attics must be bracketed. When installing a new twinwall flue system if the flue exits the roof within 600mm horizontally from the ridge high point of the roof then the flue must extend a minimum of 600mm above the ridge. Under the boiler flue position regulations the flue has to be positioned a certain distance from any parts of the home that can be opened up such as windows and doors.

To get a good draw you need a tall enough chimney and to raise the end of the chimney or flue up away from the roof. A venting system shall be designed and constructed so as to develop a positive flow adequate to remove flue or vent gases to the outdoor atmosphere. Also at every joint.