Wall insulation in the roof...

[_ethrty-Andy_ 2132]

So odd question.. but there must be a reason that wall insulation is different to roof, or is it all just marketing? i have a bale left over from renovations and am thinking i might use it in the garage now we are coming in to winter.

particularly concerned if there is any added fire risk.

edit: it is a versalite garage or whatever they are called, the kit set type.

cheers

Andy

Edited May 16, 2016 by _Ethrty-Andy_

[richard 384]

you can use wall batts in the ceiling but not ceiling batts in the walls different R ratings, I can't see a fire risk.

[aja540i 1906]

Roof insulation usually has a higher R rating, wall insulation has to fit in a 90mm cavity, roof insulation can be thicker, otherwise its the same.

[_ethrty-Andy_ 2132]

great thanks guys!!

[zero 1162]

Its the same - just a different shape.

Check r ratings too

[westy 614]

you can use wall batts in the ceiling but not ceiling batts in the walls different R ratings, I can't see a fire risk.

Other way round mate.

[westy 614]

Oh yeah they're different sizing too for different framing spacings.

[3 SERIES 93]

Throw them in Andy.

No issues with fire rating.

Wall insulation is generally 90mm and have a lower 'R' value than ceiling which is significantly thicker.

[allan 295]

Need a bit more info Andy are they wall batts or ceiling should say on the wrapping? If wall batts should be no problem if ceiling might be wrong size and need to be cut plus protrude out passed the stud edge and course some problem if you are going to line that area later. The reason is the wall batts are generally sized to fit the stud spacing most homes are either 600 or 400 centres . The last time I fitted these the wall batt rating was 2.8 and ceiling 3.2 or greater I believe and at 2.8 one could start to feel some resistance the gib sheet was being fitted. To get the max out of the batts and your time in fitting them they need to be fitted neatly not compressed or loose in the spaces. Also does the garage have building paper or not?

[kiwi535 538]

you need to ensur the insulation wont get wet from consensation,Of course that will apply to the walls and the roof of your versatile garage.as others have said wall batts are up to 90 mm thick,ceiling can be 150 mm thick,and cut to different widths

Edited May 16, 2016 by kiwi535

[MattA 164]

Just be mindful insulating around light fittings if you have a ceiling and recessed lights.

Some info here, will be the same if you're using other brands.

http://www.pinkbatts.co.nz/installing-insulation/installation-instructions/

[_ethrty-Andy_ 2132]

its just a tin shed and i have a bag of insulation.

dont really need to over complicate the whole thing!

[3 SERIES 93]

You should really be looking at doing an H1 calculation and submit this to the HCC for approval. You'll probably get away with doing the schedule method in this case.

Let us know how you get on.

[zero 1162]

its just a tin shed and i have a bag of insulation.

dont really need to over complicate the whole thing!

Well you will definitely need a council permit then

[jom 98]

Need a bit more info Andy are they wall batts or ceiling should say on the wrapping? If wall batts should be no problem if ceiling might be wrong size and need to be cut plus protrude out passed the stud edge and course some problem if you are going to line that area later. The reason is the wall batts are generally sized to fit the stud spacing most homes are either 600 or 400 centres . The last time I fitted these the wall batt rating was 2.8 and ceiling 3.2 or greater I believe and at 2.8 one could start to feel some resistance the gib sheet was being fitted. To get the max out of the batts and your time in fitting them they need to be fitted neatly not compressed or loose in the spaces. Also does the garage have building paper or not?

Love "ceiling might be wrong size". Just resize your roof then. :-)

Seriously, with a vapour barrier, any insulation is going to be an improvement....