Hi
I need to insulate an extension unfortunately I have no access into the roof space. The ceiling is combed and looking from outside I don’t think there will be much space between the plaster board and the roof. If I gain entry into roof space would it be possible to insert a Celotex or similar board in between the joists in the sloping part of the roof, ensuring I leave the required space for air to flow? As for the level part of the ceiling, if I gain entry to it would I be able to insulate in between the joists, ensuring a 50mm gap between insulation and roof and then would it be possible to insulate the existing plaster board ceiling below the joists by bonding Celotex to the plaster board ensuring all joints are taped with the relevant jointing tape? The plan was to then clad the ceiling in timber, if that’s possible, by screwing through the Celotex or similar board and into the joist, would that be ok or would it compromise the vapour barrier? To add to the problem there is a feature sandstone wall (the original outside wall) this is uneven and has gaps between the ceiling edge and the wall, is there a product that could be used to fill awkward gaps, i.e. some kind of flexible filler?
Cheers
Barry
I need to insulate an extension unfortunately I have no access into the roof space. The ceiling is combed and looking from outside I don’t think there will be much space between the plaster board and the roof. If I gain entry into roof space would it be possible to insert a Celotex or similar board in between the joists in the sloping part of the roof, ensuring I leave the required space for air to flow? As for the level part of the ceiling, if I gain entry to it would I be able to insulate in between the joists, ensuring a 50mm gap between insulation and roof and then would it be possible to insulate the existing plaster board ceiling below the joists by bonding Celotex to the plaster board ensuring all joints are taped with the relevant jointing tape? The plan was to then clad the ceiling in timber, if that’s possible, by screwing through the Celotex or similar board and into the joist, would that be ok or would it compromise the vapour barrier? To add to the problem there is a feature sandstone wall (the original outside wall) this is uneven and has gaps between the ceiling edge and the wall, is there a product that could be used to fill awkward gaps, i.e. some kind of flexible filler?
Cheers
Barry