Insulating upstairs bedroom

naf123

Hello

We have a bedroom on top of the garage - it's freezing compared to other rooms.

Unfortunately there is no access to underneath the floor (carpets etc ) in the bedroom. However in the garage there is a concrete ceiling.

Would it be ok to put up celotex boards? Or should I put rockwool? Should I be wary of potential codenstation issues?

Many thanks!

sevenhills

naf123 wrote: »

Hello

We have a bedroom on top of the garage - it's freezing compared to other rooms.

The attic is one of the best places to insulate in your home because it can be a huge source of energy loss.

Heat rises so the first place to insulate in the ceiling/roof.

Doozergirl

I don't think insulating the concrete underneath will have nearly as much effect as insulating directly under the floor because you'll still have a cold bridge coming in from the external sides of that concrete.

Contrary to what sevenhills says, yes, insulating above is important, but for a room over a garage with zero insulation, the floor is just as important. Those rooms are like ice boxes with five external sides out of six and often the main wall of the house keeping the heat on the orher side too. Everything counts, but roof and floors particularly.

Grenage

I would also pull up the floor and insulate within the room; if you can spare the floor space then you could also insulate the walls.


Start with the floor and do more as needed.

cranford

My garage is warmer since I had an insulated door fitted rather than a single skin metal one. I would also check around the door opening to see if there are any gaps.

ComicGeek

Doozergirl wrote: »

I don't think insulating the concrete underneath will have nearly as much effect as insulating directly under the floor because you'll still have a cold bridge coming in from the external sides of that concrete.

Agreed, but it would be better than not doing anything at all. Depending on clearance above garage doors, you could also extend a strip of insulation down the wall at high level to reduce the effect of the cold bridge as well.

Combining that with an insulated garage door and sealing air gaps would make a big difference in the room above.

keith969

cranford wrote: »

My garage is warmer since I had an insulated door fitted rather than a single skin metal one. I would also check around the door opening to see if there are any gaps.

This ^^^

I used to have a metal up and over door, when I replaced it with well fitting wooden doors it made a huge difference to the temperature of the garage. The bedroom above is much easier to heat as a result.

trailingspouse

We have an integral garage, so the living room and dining room are directly above it, and it was COLD. We insulated the garage door, and it made a huge difference. Another option might be to have some sort of low-level heating on all the time in the garage?

naf123

Thanks . Looks like I will insulate the metal up and over garage door .

Just trying to get my head around all the information online about the best way to insulate the door eg a air gap? Foil? Kingspan boards etc etc.