I am a DIY'er working on a cottage in a remote part of the UK.
I don't really have access to a professional roofer so I've just been having a go at it myself with some labourers.
So we have constructed a pitched roof and it is stopping any bad weather getting in.
The construction of the roof is:
- Concrete roof tiles
- Klober Permo Forte underlay
- Sarking timber
Picture for reference:
Now I am about to do the insulation and framing inside the roof, do I need to put a vapor control layer inside the rafters?
If I need a vapor control layer, does it get stapled to the sarking or does it sit under the gyproc (dry sheet)?
The trusses are 250mm depth (2'x10') and I will be putting a gyproc sheet with 150mm PIR boards, making it a cold roof.
Picture for reference
(note the roof rests on 800mm thick stone walls)