Was hoping someone with the right expertise could point me in the right direction with my insulation query...
We have a room over a garage and when we moved in it was highlighted that the ceiling did not meet fire regulations. As we needed a load of electrical work done we pulled down the old ceiling and removed the old fibreglass insulation.
I was going to fill the joist gaps from below with fibreglass batts and then use celotex (25mm-50mm) over the existing joists, seal the gaps (with appropriate tape) and then plasterboard (using fireproof stuff) over that and then skim.
My worry is that the celotex will provide a vapour barrier between the garage and the fibreglass insulation and that moisture will form in the insulation causing wet, mould etc.
Should I be worrying about this? Is this a viable solution?
Or should I be trying to install a vapour barrier between the floor above and the insulation?
I would install the celotex directly inbetween the joints but there is ALOT of pipe and wires to work around!
We have a room over a garage and when we moved in it was highlighted that the ceiling did not meet fire regulations. As we needed a load of electrical work done we pulled down the old ceiling and removed the old fibreglass insulation.
I was going to fill the joist gaps from below with fibreglass batts and then use celotex (25mm-50mm) over the existing joists, seal the gaps (with appropriate tape) and then plasterboard (using fireproof stuff) over that and then skim.
My worry is that the celotex will provide a vapour barrier between the garage and the fibreglass insulation and that moisture will form in the insulation causing wet, mould etc.
Should I be worrying about this? Is this a viable solution?
Or should I be trying to install a vapour barrier between the floor above and the insulation?
I would install the celotex directly inbetween the joints but there is ALOT of pipe and wires to work around!