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Which insulation did you use and was it pre bonded to the plasterboard? I really want to give this a crack
apc-
Yeah prebonded. Made more sense to me then doing it separately. I used 37.5mm siniat boards from selco. The prices sure have gone up though. https://www.selcobw.com/siniat-thermal-pir-tapered-edge-2400-x-1200-x-37-5mm
Hovis
Yeah that was me. Two external walls in the corner of the house. 25mm insulation bonded to plasterboard. I stripped the plaster back to brick, fixed 25mm roofing battens then screwed onto those. The walls are noticeably warmer and the room holds its temperature better than the other bedrooms. I'm very happy I did it, especially with his bed tucked in the corner. In hindsite, I wouldn't have bothered stripped back to brick, it only gained around 25mm iirc, and it was a lot of mess and the bulk of the hard work.