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Right then, got the plaster boarding sorted thanks to the STW experts but i've realised i'd better insulate between the flat roof joists before i board the ceiling but what to use.
The roll loft insulation is alot cheaper but will be a pain to do from below or do i go for the board stuff which is more expensive and will take a lot of cutting and fitting??
thanks DIYers
AFAIK you can use either, I used the rigid and they are nasty to cut and fit so wear a mask. If you need ventilation between the insulation and whatever is above it the rigid board is probably best. I take it building control are not involved? They may want roll type insulation supported by chicken wire, something to do with fire resistance. Depends where it's going.
What do I know though, I'm a DIYer in way over my head.
90mm of celotex or similar, gives the same R value (insulation effectiveness) as 150mm of rockwool, but is about 4 times the price per m squared.
I'd go with the board stuff.
I used the fluffy roll stuff. It seems to be working, no problems after all of a year!
Easy to fit:
http://www.screwfix.com/prods/21112/Building/Roofing-Insulation/Airtec-Double-Insulation-1-05m-x-25m
That airtec stuff isn't a product I'd ever consider using- maybe in a campervan not in a house.
That airtec stuff isn't a product I'd ever consider using- maybe in a campervan not in a house.
Why not?
thanks all, i've gone for roll to save some cash!