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Are you happy with the results warmth wise and how did you arrive at 70mm PIR boards( rather than 50 or 100)

Interesting, I like what you've said about diminishing returns as an extra 20mm costs about another £200 for my project and I don't want to put extra in if the impact is not noticeable in terms of warmth in the rooms. Also, does the silver foil backing on the boards not form some kind of vapour...

Thanks for the replies guys, appreciated. Would 50mm suffice( just to be clear I'm not lifting floorboards, I'm accessing from below, many thanks

Hi guys I have a 1960s bungalow with a 4ft void from the floorboards and joists to the floor beneath it. I'm wanting to put PIR boards between the joists and seal them with requisite insulation tape. Couple of questions:- I was going to use 50mm boards, is this sufficient? Would I push boards...

Thanks Davy-I see your point-how long is a piece of string ? P.S.For £6k,Id want gold fittings !!

Thanks for the :wink: replies everyone-so somewhere between £1 & £10k-funny thats what I thought !!Sounds like somewhere around £2k-£2.5 ??

hi everyone-Im buying a 3 bed terraced property to renovate-its a shell at the moment & I need a full rewire-can anyone tell me what a full rewire should cost approx as I dont want to get ripped off-any advice gratefully accepted,cheers,Ian