they haven't given a spec apart from 150mm insulation I'll ask what type.
thanks for the reply
Thought current Building Regs was minimum 270mm?
Thats for new build, as this is existing and just to increase the efficiency every little helps
is that just for new builds though ? will do some digging unless others can advise. As said before I'm clueless about this sort of stuff
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they haven't given a spec apart from 150mm insulation I'll ask what type.
thanks for the reply