Also at every joint.
Flue through roof regulations.
That means that it will suck air through from your stove which also helps it to burn well.
In the loft it will likely need some type of mesh protection.
Vertical flue joints in attics must be bracketed.
If the flue passes through bedrooms it should be boxed in with an inspection hatch situated in a specific place.
A vertical flue looks similar to a very small chimney and can be seen spouting out steam when the heating is on.
The twin wall flue must pass through the ceilings and roof.
A gas vent shall terminate in accordance with one of the following.
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.
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.
This flue runs up through your house and exits through your roof.
G2427 6 5 503 6 6 gas vent termination.
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.
The building regulations identify the zone for this but any of these dimensions may need to be increased where there is exposure to.
As placement of the vertical flue is more complex and convoluted than a standard horizontal flue it is more costly.
And there s a very good reason for this.
How high does the flue have to go.
Any vertical flue joints if your flue is going through the roof for example must be bracketed with specific flue brackets every 800mm 1000mm.
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.
Above the roof surface with a listed cap or listed roof assembly.
In this case the flue goes upwards and then out through the roof.
If the flue exits the roof further down then it must extend high enough to acheive 2 3m of horizontal clearance.
A roof or any big object really creates eddies swirling patters of air and areas of high and low pressure which can reduce draw.
As they pass through the home up to the roof vertical flues are either boarded over or housed inside a cabinet.
