Hi all,
I have a 1960s bedroom extension above a very cold garage below, in my 1930s semi. Looks like the people who put the bedroom extension in didn't bother insulating the floor... so it's freezing in winter and no doubt massively leaking heat!
The bedroom has stripped and polished floorboards, they are all in good condition and seem to be original from the 1960s - so I'm a bit loath to damage them by tearing them up to install insulation from above.
I wondered whether it was feasible to do it from below? There are standard 9.5mm thick plasterboards on the ceiling of the garage, I've tried removing a few joist screws and they come out fine.
Would it just be a case of installing strips of Rockwool or similar, taping them in place if necessary, and then screwing the plasterboards back on?
** Is there a need for a damp proof membrane on the top of the joist spaces, ie. just below the floorboards of the bedroom? Would this be a problem because the tops of the joists are not accessible?
** Is there a need to install additional insulation sheets across the bottom to prevent thermal bridging of the joists? Would this prevent the ceiling plasterboards being screwed back on, due to the increased depth?
** Part of the bedroom has an en-suite bathroom which has a tiled floor, and from below there are various pipes on the garage ceiling which will make it very hard to remove the ceiling plasterboard. If I don't insulate below the bathroom, does that make the whole project pointless because all the heat will continue to rush out of the bathroom floor anyway??
Has anyone done this sort of job before??
Thanks very much for any tips!
I have a 1960s bedroom extension above a very cold garage below, in my 1930s semi. Looks like the people who put the bedroom extension in didn't bother insulating the floor... so it's freezing in winter and no doubt massively leaking heat!
The bedroom has stripped and polished floorboards, they are all in good condition and seem to be original from the 1960s - so I'm a bit loath to damage them by tearing them up to install insulation from above.
I wondered whether it was feasible to do it from below? There are standard 9.5mm thick plasterboards on the ceiling of the garage, I've tried removing a few joist screws and they come out fine.
Would it just be a case of installing strips of Rockwool or similar, taping them in place if necessary, and then screwing the plasterboards back on?
** Is there a need for a damp proof membrane on the top of the joist spaces, ie. just below the floorboards of the bedroom? Would this be a problem because the tops of the joists are not accessible?
** Is there a need to install additional insulation sheets across the bottom to prevent thermal bridging of the joists? Would this prevent the ceiling plasterboards being screwed back on, due to the increased depth?
** Part of the bedroom has an en-suite bathroom which has a tiled floor, and from below there are various pipes on the garage ceiling which will make it very hard to remove the ceiling plasterboard. If I don't insulate below the bathroom, does that make the whole project pointless because all the heat will continue to rush out of the bathroom floor anyway??
Has anyone done this sort of job before??
Thanks very much for any tips!
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