freezing floor in room above garage - help

dagger · 22 May 2007

Hi gents - we've just moved to a new house and my daughters room is the one above our garage. The garage has a new looking plasterboard ceiling, but the floor in the bedroom above is very cold (noticeably colder than other rooms in the house)

I'm happy to pull down the plasterboard ceiling in the garage but want to know the best way to sort it out for next winter ie/ whats the best insulation to stuff in before replacing new plasterboard ceiling back up

thanks in advance

JohnD · 22 May 2007

fibreglass loft insulation.

If you can the the floor up above, that will be easier than having the ceiling replastered (you can run cables foir any additional sockets or lights, and move the radiator pipes at the same time if you want.

Integral garage ceilings have to be double thickness plasterboard, I think, as fire protection.

I notice B&Q are flogging the remains of their loft rolls at half price this week. This is soft fibreglass with a plastic film cover to protect your skin and lungs from stray fibres.

Check for any gaps allowing draughts and mice through, and seal them up. Injectable foam is handy for draught gaps.

big-all · 22 May 2007

suspect it a combination of draughts and more outside area than other rooms with a lack of insulation all round

i pesonaly doubt the floor is the only[main] cause is there a good carpet fitted tight to the skirting!!!!!!

dagger · 31 May 2007

thanks gents - well we've already fully decorated the bedroom so dont want to take up the newly layed carpet etc - so only way really is to pull down plasterboard ceiling in garage and insulate from there before replacing plasterboard it seems .

and yes there is a brand new very thick professionally laid carpet fitted tight to skirting

cheers guys any further tips welcomed

noseall · 31 May 2007

i wouldn't think twice about pulling down a ceiling as opposed to ripping up a floor and skirtings in a furnished room. the floor lifting option is a heck of lot more difficult believe me!

as JohnD says, full fill the void with quilt insulation, as this will help reduce noise too.

......mind you, it would be a whole lot nicer to fit the inso' from above.

2scoops0406 · 31 May 2007

You don't need double thickness plasterboard, just special fire rated plasterboard. Insulate from below, but remember to allow some air circulation. Rooms above garages are notorious for being cold.

noseall · 31 May 2007

.......actually you don't need fireline boards unless stated. a standard half hour fire rating can be achieved with 12.5mm boards and skim.

this was verified, applied and passed recently.

Nige F · 2 Jun 2007

Fix celotex to the existing garage ceiling and board over that

Unless it`ll interfere with the door opening

Robert too · 2 Jun 2007

Nige F said:
Fix celotex to the existing garage ceiling and board over that Unless it`ll interfere with the door opening

Thats exactly what I would do , but before that , i would run a perimeter mastic seal to exclude draughts

Robert too · 2 Jun 2007

++edited out++

Robert too · 2 Jun 2007

thats fine .

Its a pity you arent so keen to moderate the poor and innacurate info that some members post here as the gospel ,

I would have hoped that the ideal of the moderator was to protect the innocence of those asking questions here , rather than those who preach innacuracies .

keep an eye open , you do yourself no justice by ignoring the problem.

I did try to delete my account from here to avoid any association , but it doesnt let me , any help you can provide with that would be much apreciated .

dagger · 3 Jun 2007

thanks guys

so this celotex stuff - is it just a board like plasterboard type stuff ???

and are you saying that it will be ok just to screw celotex to my existing plasterboard ceiling and then replasterboard over ???

without ripping old ceiling down and adding fibreglass first ??

noseall · 3 Jun 2007

building control officers prefer the use of fibreglass quilt type insulation, in this particular scenario, simply because it adds noise deadening as well as thermal protection.

all the bc's round staffs insist upon quilt between garage and bed above.

i agree the rigid boards i.e. cellotex, kingspan etc provide a better 'u' value but cannot compete with the acoustic side of things.

dagger · 3 Jun 2007

so would the ultimate warmth and sound deadening scenario be both ???

if so I might go for that then or is that too over the top ?

Robert too · 3 Jun 2007

I wouldnt consider it over the top , i see both as the perfect scenario.

Just that adding celotex over the top , is an easy fix

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freezing floor in room above garage - help

2scoops0406

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