Lectrician
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Thanks.
As I am planning to drop the ceiling and create a fairly large void, air will be able to flow below the joists, so I am assuming I would not need to place air vents in the roof in every joist bay?
Where the joists sit on the breeze block wall, they finish flush with the render on the outside, and a facia is then nailed to them - there is no soffit to speak of, so not sure how I would vent that side......
I think I may just do a warm roof again - the BCO asked me to do that last time when doing the dining room in the end of the garage. He was happy with celotex rammed tight to the underside of the roof, between the joists, with mastic run down each side of the celtex too. Probably going to be easier that way, although I know now strictly correct as it should be above the joists really.....
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