Floor insulation advice for garage conversion to office Re-generate an old or tired space and give it a fresh breath of life. Click here for answers, information and tips

[omega1]

Hi there,

I'm converting our garage into an office and the garage already has a false floor with a 46mm cavity but with no insulation.

I'm going to cover it with liquid DPM and wanted to add some insulation between the floor and the false floor, but not sure which is the best approach.

I can buy 25mm thick insulation panels, but this will leave a gap of around 20mm. The 50mm thick panels are just a little too thick or I was thinking using insulation wool but the thinest I can find is 100mm which will mean it will get heavily compressed and I hear this is not ideal for the wool to breathe.

What would be the best approach here?

Thanks in advance for any advice.

[stoneyboy]

Hi omega1,
Suggest you use cavity wall batts which are 50mm thick so slight compression will occur. You will have to put a DPM over the whole floor to control condensation.
Regards S