Insulation in garage gym partition

20 Nov 2007
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United Kingdom
Am partitioning off an 8’ x 8’ part of a detached garage to use as a gym area. 3 walls are internal walls, with only one against one of the single skin garage walls.

Just to complicate things, the garage wall has two pillars in it. I’ve built the stud forward of the brickwork slightly.

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Any advice on how best to insulate this a little? Was planning to use 25mm PIR boards in front of the 2 pillers but what to put in the deeper part?

Not intending to spend a fortune, in fact I have 3 rolls of rockwool leftover from when we did the loft - ok to use this? Can I just stuff it in, or does it need to be kept away from the brickwork?

Any advice appreciated.

Last edited:
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