Pir, load rating

[Russell griffiths]

Evening all, I’m being lazy and can’t be bothered to look it up, does anybody know the load rating for pir insulation, in so much as being used under a floor screed, if I was using eps it would either be eps 70 or 100. Does pir have a load rating. 

Cheers russ. 

[Nick1c]

I was short of a couple of sheets of eps 100 for our slab & couldn’t get any locally so I called the SE, he was happy with PIR, but it had to be covered so the concrete didn’t attack the foil. 

[Temp]

Celotex say 120-150 kPa in here depending on version.

 

https://www.just-insulation.com/downloads/celotex-rigid-insulation/celotex-certification/bba-certificate-flooring-14-nov.pdf

[Ed Davies]

That's for versions of Celotex specifically intended for floor insulation with a deformation of 10% so probably not even remotely applicable to other versions at sane levels of deformation.