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[QUOTE=Watsey;30704586]the part of the extension that contains our kitchen/diner has beam & block, 150mm closed cell insulation, 75mm screed, /QUOTE]
That is excessive! The last house I built with B&B floors had 75mm solid insulation and 50mm screed. It achieved band 'A' energy efficiency on the waste of time EPC aswell.
Last edited by Pond; 12-03-2023 at 05:52 PM..
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