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  1. K

    How to extend an old cavity wall and meet new building regs.

    So it's not possible then? Unless I rebuild the old wall to be the same as the new proposed wall - 100 brick + 100 Drytherm32 batts + 100 Aircrete + plasterboard on dabs. Trouble is the founds were built for 250mm and it seems ridiculous that I would have to excavate the foundations to...
  2. K

    How to extend an old cavity wall and meet new building regs.

    Hi, I want to extend my semi at the rear so that the rear wall, which currently steps out by three metres halfway along, is all one wall. I want to make the entire space into one large room with the rear wall largely an opening for glass folding doors. However the original wall is 250mm...
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