New Flat Roof, warm roof construction - joists, ply, Celotex, ply.
Can anyone please help me confirm where exactly the vapour control layer is meant to be?
I checked the roof and could not see any type of membrane/layer - I can clearly see the Celotex between the ply from above and below.
Builder says it will go in later - under the joists - but I cannot see any diagram on the internet illustrating this method.
Googling only ever shows one method - VCL over bottom deck of ply under the Celotex. I can imagine VCL under the joists being problematic with electrics going through it.
Many thanks
Can anyone please help me confirm where exactly the vapour control layer is meant to be?
I checked the roof and could not see any type of membrane/layer - I can clearly see the Celotex between the ply from above and below.
Builder says it will go in later - under the joists - but I cannot see any diagram on the internet illustrating this method.
Googling only ever shows one method - VCL over bottom deck of ply under the Celotex. I can imagine VCL under the joists being problematic with electrics going through it.
Many thanks
