No we have no membrane,
I was wondering if I could just put in the 100mm however someone said that the 75mm would go between the rafters then the 25 goes accross all, perhaps to insulate the rafters too????
also not sure if the 50mm air gap starts at the tiles or at the batten.
I am...
I haven't !
BI has said to put 100mm in and advised 75mm then 25mm. but has reminded me that it is my responsibilty to meet the regulations.
I am struggling to find out more on the internet.
I think I may have to ask a company to come out to quote just so I can find out what they say?
Thanks DD for your notes
Sorry I was not clear, that was an indication of my understanding..
I am doing this through permissible developments do did not need planning permission. Architect only did basic drawings for the structural engineer for the dormar, so not much info..
I managed...
First time posting here but had some good advice from other threads, thank you. I am NOT a builder so I need all advice at SIMPLE level.
Had a loft conversion done on 2 bed bungalow - Due to limited cash - conversion getting done in stages, all the structural work is now done. Next job is...