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Roof Insulation

Posted by David Lake, on Wed 02 Mar 2016 04:40pm

Insulating an unfelted roof from inside, should air be allowed to enter from the eaves or should it be as airtight as possible?

martin wilburn

Wed 02 Mar 2016 04:53pm

Air must be allowed to flow through and a 50mm gap must be maintained between the insulation and the felt to allow condensation to flow out and prevent rotting on roof timbers

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