Ceiling insulations options

[huwy123]

Hello,

I've recently had an (internal) garage conversion.

There was no insulation put in the ceiling - not required apparently as there are habitable rooms above. This in hindsight was a massive error as winter is here and the room is frigging freezing.

I was wondering if there are any options to insulate without ripping the plasterboard board down and having to reskim/decorate again? Perhaps injecting foam or polysterene balls. There is a flat concrete ceiling.

I suspect not, but thought its worth investigating other options.

Huw

 

[JP_]

Surely the heat is being lost elsewhere if there are warm rooms above? Were the floor and walls fully insulated?

 

[huwy123]

No the rooms above are pretty cold also.
I have looked at insulating the rooms above which is far from straightforward.
Walls and floor are both insulated

 

[JP_]

why are the rooms above cold, will they stay that way?
It would make more sense to insulate the whole house rather than just a downstairs garage conversion.
If you do insulation the garage roof, best way would be to put in rockwool insulation inbetween the floor joists as this will reduce sound too. Quickest way would be to overboard existing ceiling with insulated boards and skim.

 

[John D v2.0]

Insulation between two internal rooms won't help, you need to check radiator sizes and any missing insulation on cold sides eg floor and walls. Also any draughts or thermal bypass

 

[Leofric]

There is a flat concrete ceiling.

don't understand this. Can you clarify what is actually concrete to start with ?

 

[IT Minion]

You've got a choice of insulating the garage ceiling, which will make the garage warmer and rooms above colder, or insulating the rooms above which will make both warmer.

Insulating the garage ceiling will also only reduce heat loss to the rooms above by a proportion of the thermal difference. If the rooms above are 20 degrees colder then that's a big difference and insulation on the ceiling will help keep the garage warmer and the rooms colder, if they're 2 degrees colder then that's nothing and no amount of insulation is going to make any difference.

What insulation do you have in the walls and floor at the moment? It might not be good enough.