Hi,
just getting around to fitting some 65mm diameter circular vents into my soffits.
A quickish Google doesn't give me any details of the recommended spacing.
Can some kind person give me a figure to save me trawling through the building regs?
TIA Dave R
Generaly one between each rafter, at least thats what the Building Inspector of my recent extension wanted.
i.e.
II O II O II O II etc etc
If that makes sense where II is the rafter and O is the vent
HTH
Duncan
That'll do for me - thanks.
That's only necessary if there is no cross linkage across the air between the rafters, for example if Kingspan was inserted. Half this number would easily meet the airflow requirements.
I bleiev teh requirement is cross sexctional area equivalent to a 10mm wide strip all round teh roof, plus roof vents, but I can't be arsed to check teh exact wording.
I suggest you google it
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