DIY Doctor UK DIY Forums

Hi, Sorry if this has been asked before, but struggling to get the same answer of more than one person, so thought I'd try my luck here!

I'm planning on insulating a wall between the garage and the house. It's only a single skin termalite block with plasterboard on the internal house side.

My plan is to paint masonary sealer on the garage side and build a 3 x 2 stud frame on the wall (using the guide here) Then fill this this Wickes General Purpose Insulation Slabs and finally put vapour control plasterboard over the top.

My problems are,
1. I can't find an data on the Wickes slabs so not sure how effective they are.
2. Should I be using something like Kingspan ridgid blocks instead of the Wickes stuff.
3. Do I need to leave a GAP anywhere? For example, if the stud is 3 x 2, the Wickes slabs are 50mm thick, so should the frame be 2" deep?

Any help would be great as this is the first time I've every done anything like this!

pzz5jp,
Assuming the wall and garage floor are dry I would suggest drylining the garage with plasterboard with insulation bonded to the back.
end

[quote="stoneyboy"]pzz5jp,
Assuming the wall and garage floor are dry I would suggest drylining the garage with plasterboard with insulation bonded to the back.
end[/quote]

stoneyboy thanks.

A mate of mine today suggested Thermaline Super 60mm boards as they have a built in vapour layer. So think I'll go with that. It's only a small area as just had a door put in, so was thinking of attaching using a few tubes adhesive as I can get it cheap of a mate.

My only questions would be, do I still need to use Masonary Sealer first? and once installed, should I get it finished? Don't really want to as in the garage so don't see the point, unless the insulation degrades if I don't. Also no good at plastering myself!!

Thanks again for the help.

pzz5jp,
since you are effectively working with an internal wall I would not bother with sealing or finishing.
end

[quote="stoneyboy"]pzz5jp,
since you are effectively working with an internal wall I would not bother with sealing or finishing.
end[/quote]

If it was the other side of his garage and it was a single skin brick what would you suggest?

acsimpson,
If it is a single skin outside wall you need to form an inner wall with a ventilated cavity.
end