Its not about the thickness between the rafters, the under the rafters insulation is to stop cold bridging thru the timber (as mad as it sounds)
Dry lining is tapered edge plasterboard finished with joint tape and filler then sanded, as opposed to skimming, regardless of how its fixed. Well thats how I see it..
Dry lining is tapered edge plasterboard finished with joint tape and filler then sanded, as opposed to skimming, regardless of how its fixed. Well thats how I see it..