Flue Through Roof Regulations

Vertical flue joints in attics must be bracketed.

Flue through roof regulations.

If the flue exits the roof further down then it must extend high enough to acheive 2 3m of horizontal clearance. Also at every joint. The minimum chimney height recommended for minimum performance of wood burning and multi fuel appliances is 4 5 m from the top of the appliance to the top of the chimney. The flue will be about approx 2100 mm above floor level which will be tricky to hide within a roof space and would be touchable from inside.

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. As they pass through the home up to the roof vertical flues are either boarded over or housed inside a cabinet. Illustrations of proper gas fired water heater venting using type b double wall vent pipe through a roof above or through a chimney below include details for the flue vent connector such as the requirement of a minimum vent connector upwards slope of 1 4 per foot of horizontal run. Care should be taken to follow manufacturers installation and safety clearance instructions.

Any vertical flue joints if your flue is going through the roof for example must be bracketed with specific flue brackets every 800mm 1000mm. And there s a very good reason for this. The boiler flue regulations take into account several things from the position of the flue to the direction that it can face. Find out how to ensure that your new gas boiler flue meets the regulations with the table below.

Well the flue which is a term referring to the vent pipe is basically the important component from the furnace that will transport the emission from the combustion heating process to the outside area of the house. Typical single storey flue system through framed chimney with cap flashing flat ceiling with open roof cavity space and pitched roof. So is this permissible or does it have to be boxed in. This is a graphical display of a typical freestanding 150mm diameter flue system.

The building regulations identify the zone for this but any of these dimensions may need to be increased where there is exposure to. This means that the flue outlet needs to be positioned sufficiently high above the roof surface and surrounding buildings to prevent it being affected by wind eddies or downdraughts. So will probably have to extend it forward and then take it up through the roof. A maximum of 4 bends up to 45º angle is allowed.

Boiler flue regulations safety first is an adage that should always be applied to boiler installation.