DIY Doctor

Insulation order for single brick airgap distance

Postby MWCDE » Sun Jun 07, 2020 11:28 am

Hi all.

I've been looking at converting our detached garage into something of a play house for our son. Nothing too major but I keep reading different ways of doing the insulation.

It's a new build (2018) detached garage with single brick and slab floor. BPM is visible two bricks up from floor. I'm assuming a DPM is also under the slab somewhere.

The way the garage is built is that it's not square, it's got breeze block corners and middle posts so its going to require some off spaced\shaped design work at the edges which is fine.

What my plan is to...

DPM 1000 gauge between anything that touches either brick or slab.

Treated CLS 38x63mm for the batten frame floor.
CLS 38x63mm for the rest of the frame.

Integrated breathable membrane between the brick and the frame (Question - What distance does this need to be from the brick for the air gap?

50MM Kingspan to fill the batten frame. (is this enough?)
Plasterboard the frame.

I could use 38x89mm CLS timber which allows the use of 75mm Kingspan.

Does this sound ok?
MWCDE
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