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I live in a coach house, which is a large apartment above three garages, one of them being mine. The garage doors are the usual up n over ones that have absolutely zero thermal efficiency and have fairly sizeable gaps in the side, which allow plenty of cold air into the garage.
My house is fairly thermally efficient, except for my wooden floor never warms up as (I assume) the cold comes up from the garages underneath. I access mine from an internal door at the bottom of the stairs and the other two garages just have their main garage door for access. They are adjoining properties and don't keep their cars in them.
I'm pondering finding a way of stuffing some insulation into the ceilings in the garages to reduce the cold from chilling my floor. I'm 99% sure that the upstairs floor is block and beam then skimmed and underneath, there are some joists that the double plaster boarded ceilings are attached too.
I'm working on the fact I can locate each beam and drill a hole and pump in some sort of insulation into each cavity then seal the holes with some sort of plaster that protects the fire integrity of the ceiling, possibly something like Micafill.
Is anyone aware of this being done? Both my neighbours are more than happy for me to do it, but I'm keen to do it in such a way that I can prove I haven't compromised the integrity of the ceilings if they sell their houses, although their garages are leasehold to the estates management co and mine is freehold.
at about 7:20 in
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Would they allow to to overboard with insulated plasterboard and lower the ceilings slightly? That would probably be more efficient as you are also overboarding the joists.
Probably be quite hard to fill the cavity evenly unless you use a professional with the right equipment.
I've thought about similar in mine (I also live in a coach house and even the carpet gets cold) not actually bothered to do anything about it though. When I needed to replace my own garage door I went for an insulated one but I can't say it made a noticeable difference to the room above.
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Could you afford to loose some ceiling height in your flat? If so, perhaps floating PIR with a new chipboard floor over the top?
'block and beam over joists' makes no sense to me. The beam part of 'block and beam' are the structural members so you wouldn't need joists.
I think it's block and beam with battens fixed underneath so the plasterboard can be fixed to the battens.