Thanks for that, doesn't using PVA prevent damp also?
If I use bitumen and sand and then dot / dab my boards up there, what is the minimum distance between the boards and the wall to avoid condensation forming and causing issues?
I've got a brick utility room wall that connects my utility to my neighbours utility (even though I'm semi detatched on the other side). I had some damp where there was an issue with the guttering between our utility roofs which has now been resolved by replacing the guttering and my roof has now be...
