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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...

if i split it in half do i have to use steel.? also if i split in half, do i put 2 joists bolted together across the 16ft span to support the the joists coming from the end walls which are brickwork with sole plates on. thank all of you for your help.

thank you so much for your info. it is appreciated. i have an engineer coming out in march, at least now ill have sum idea. can i then, if i use 9"x3" or 10"x2" go across the span of 16ft.? or if i fitted with what i think they call a double header ie: 2 bolted together, 1 at 8ft6" in from the...

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"...