I am in the middle of a bedroom referb and after moving the horrendously looking (and dangerous) polystyrene tiles I'm left with a roof which is not pleasing to the eye. I will post a pic below as I have one on my phone. There is also a beam running through the bedroom so I can hide that by dropping the ceiling too. The roof above the existing ceiling is a flat one which we have just had replaced with GRP.
Anyway I'm going to build a false ceiling. The plan is to build a wooden frame with strengtheners, use 50mm celotex/kingspan for insulation then 12.5mm plasterboard. There will be about a 100mm air gap between the insulation and existing ceiling. Do I need to worry about condensation. Also I was going to use 3 x 2" CLS for the stud work unless anyone has used anything better. The area is around 9 square metres.
Any information would be great.
Many thanks in advance.