Thin floor insulation

[turnpike]

Hey all,

I want to repair and improve my garage which currently has a concrete subfloor, plastic sheet dpm and 2 inches of screed. It's only used for storage, no cars.

Just a quick job and it's crucial not to bring the height up much at all.

I was thinking another plastic dpm, kingspan, chipboard, then whatever flooring i go for.

Is 25mm of kingspan worth doing or is it just too thin to make a difference?

I don't mind if it's a cold floor but if 25mm makes a difference I can stick some down.

Cheers,
Carl.

 

[freddiemercurystwin]

Its better than nowt but you won't comply if you're doing this to the regs.

 

[nanuuk]

I am pretty sure a garage can have an insulated floor as you describe. It might be against regs if you have a door to the garage from your house as you need to step down 100mm to it (fire risk requirement). If you can't keep that distance then maybe you want to apply for a planning permission to convert if you don't want to keep the garage. Then you'll comply with the regs.

 

[turnpike]

Thanks. There will still be a step down, and anything I do is way better than the sorry state of a garage it is now. No doubt in the future I can get a proper conversion but now all I'm doing is minor repair.

p.s. also found this thread //www.diynot.com/forums/viewtopic.php?t=217011

 

[nanuuk]

Sounds like a good plan. You'll make an improvement (take the chill off the floor), the garage will still be complying with the regs (step down) and you can still add more insulation for if it ever gets converted to comply with the regs then as well.
Nothing worse than freezing toes... Good luck