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High density insulation

Russell griffiths

By Russell griffiths
in Building Materials

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Mr Punter Advanced Member

Mr Punter

Posted
Posted

I have used XPS insulation which has a much higher compressive strength than EPS and PIR type insulation. I have used it on a garage floor under plastic tiles. Fairly cheap. Stuff like Foamglass is perhaps stronger but costs loads.

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willbish
willbish

I had a GRP box made up for my front door sill. It's got a ply spine and filled with PIR.   Haven't fitted yet so can't be sure it's going to work. But if it does I'll use the same method fo

Temp
Temp

Do you want it to carry the load permanently or just long enough to add fixings? If permanently then i think you want to beware of creep. Eg it might support the load initially but over several years

A_L
A_L

-so about 15kPa, EPS100 with a 1% deformation at around 45kPa would be O.K., perhaps use EPS300 to be safe   - here are several possible high compressive strength options   foamgla

Oz07 Advanced Member

Oz07

Posted
Posted
2 hours ago, Ian said:

A 100mm thick concrete floor slab weighs about 240kg per sq metre

Yeh that's about as far as my sums got before I had to rely on collective knowledge of forum to advance my understanding  cheers @BuildHub

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