I recently had my attic converted to be used as an office. I had it floored and plasterboarded. 100mm kingspan was used with 50 mm air gap on the angled part of roof but fibreglass with a polythene sheet was used for the verticle under purlin parts. Recently i have noticed some of the fibreglass is damp at bottom and polythene sheet is slightly damp. There is no leaks in the roof. Is this normal? Should i change out the fibreglass for more kingspan? Or should a VPL be used instead of polythene sheet?
Any info would be great.
Any info would be great.
Last edited: