Building regs help (flue outlet position)

[dirty boy]

Just a quickie

I've had a look through the regs, but can't quite understand it, as it's referring to pitched roof lines.

See picture.

Can I position a woodburner flue outlet on the wall where marked red? It will be an external flue, going out of the back of the stove, and postioned externally.

Any ideas on how high it would have to go? Pointless having a flue reaching for the stars as it would look daft!

TIA

[Arthur Jackson]

Whatever regs say you'll need it high enough to get wind across it.

[dirty boy]

Arthur Jackson said:

Whatever regs say you'll need it high enough to get wind across it.

I'm fairly open at the back, garden is over 100ft and then back onto bungalows etc?

At the front is a field?

[dickymint]

Rule No1. Follow the appliance manufacturers instructions.

[Jonboy_t]

I thought the flue had to protrude over the top of any roof? Might be wrong, but I remember seeing something like that on one of those cowboy builder thingies.

[tim0409]

Jonboy_t said:

I thought the flue had to protrude over the top of any roof? Might be wrong, but I remember seeing something like that on one of those cowboy builder thingies.

No - I have recently finished building my house and given the high pitch of my roof and the position of the stove I would have had to have a very long flue if this was the case! I can't remember the exact measurement (2.3m rings a bell), but so long as your flue terminates this distance from the roof you are okay. Funnily enough, when I was planning to add the stove (it was an afterthought so not contained in the original building warrant) a couple of people told me it had to be higher than the roofline, but after a bit of research of the regs luckily this is not the case.

[tim0409]

sorry - posted twice.

[Evo141n]

Approved Doc J: Diagram 17:
Note 4) A vertical flue fixed to an outside wall should be treated as equivalent to an inside flue emerging at the nearest edge of the roof
So...
B: elsewhere on a roof (whether pitched or flat)
at least 1000mm above...the weather surface.

Just make sure you're 2.3m horizontaly from any other vertical or sloping surface, which from your diagram you seem to be.

Not too difficult ;-)

Edited by Evo141n on Tuesday 16th August 16:42

[roofer]

As above, 1 metre above and 1 metre away from nearest opening window where applicable.