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    loft conversion.

    hi all, been told i need to insulate my ashlar wall for a loft conversion. WHAT IS AN ASHLAR WALL PLEASE? is it the cavity wall space.? im in an end terreced house so is it just the gable end wall.? also do you normally have to use 12.5mm plasterboard on the ceilings? thanks in advance for any...
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    floor joists

    hi, after some advice to understand loft conversions better. i understand that at a span of 16ft would need 9"x2" joists at 400 centres. can these joists be exchanged for 8"x3" joists.? also i have an area of 16ftx26ft. just wondered if a double header 9"x2" bolted together to make a 9"x4"...
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