Anybody used/speced the concrete + poly beads as an insulated floor

Calahonda52

SFS-Energystore TLA Tech Data 110 Grade (1)-1.pdf

,,,

Biker1

The 0.043w/mk thermal conductivity says it all. You would need a fair depth to achieve even the backstop u-value in Part L

Calahonda52

Well, that was not the question, however it's on a 300 slab on clay and the BRE calculator gives me 0.15 for 190 mm

so courses for horses😂

Mellor

https://www.boards.ie/discussion/comment/122038757#Comment_122038757

How did you arrive at that conclusion?
100mm should exceed me the min without much difficulty. Assuming around .022w/mk then a 200mm slab at .043 would perform better than that again. The minimum for compliance might be 170mm, which is very thin for a slab on ground.

The issue as I can see is the strength not the thermal insulation.

https://www.boards.ie/discussion/comment/122039666#Comment_122039666

Check the grade quoted above. I understand is that the lightest grade requires a sub-slab. If you have 300mm, you might be better off with the stronger, but less thermal grade. Unless I'm misunderstanding the 300mm slab on clay part.

Calahonda52

M, did some more asking : the 300 slab is actually a fully designed reinforced raft foundation slab.

The slab on clay piece is a reference to if in the calculator I change it to rock or crushed stone, it exceeds the 0.15 Part L😀

Have been in touch with the supplier who says the high-grade can work on 804, am exploring for my own reno as am digging out 550

Biker1

https://www.boards.ie/discussion/comment/122051831#Comment_122051831

Why are you assuming a thermal conductivity of 0.022w/mk. The declared value is 0.043w/mk. As you can see from the attached pdf 220mm is required to hit a u-value of 0.15w/m2k. There is also a finished screed required on top which means an extra layer of blocks compared to the use of PIR insulation.

Floor-Cement bead.pdf

Mellor

https://www.boards.ie/discussion/comment/122052082#Comment_122052082

I think you’ve misunderstood my post.

I assumed .022 because that’s the performance of 100mm phenolic insulation using in flooring (eg K3). I was comparing to that (which achieve ~0.16)

A typical slab of 200mm, at a conductivity of .043 exceeds the above (obviously as it’s <2x the conductivity). So I was wondering how you concluded that you’d need a “fair depth” at .043? Given 200mm is a typical slab thickness (which this replaces).

The actual TGD min is 0.18, you’ve achieve that with 170mm.

Edit: ah, I see the issue now. In you calc you’re swapping it in directly for a normal insulation layer. With +225mm other conc/screed build up. In that case I agree, what’s the point.

But I see the application of thermal aggregate being, single layer insulating and structural slabs.

Calahonda52

https://www.boards.ie/discussion/comment/122052082#Comment_122052082

re which means an extra layer of blocks compared to the use of PIR insulation

I dont get this

Tefral

Its used on pretty much every housing estate job im involved in now. They get through some amount of it in a day.

Calahonda52

https://www.boards.ie/discussion/comment/122052360#Comment_122052360

Where do they put the services: eg sewer pipes etc?

Tefral

https://www.boards.ie/discussion/comment/122052466#Comment_122052466

In it.

These are the lads i see doing alot of it. You can see whats happening in the videos https://www.linkedin.com/posts/gareth-devlin-7904a5111_a-wet-start-on-site-with-premier-floor-screed-ugcPost-7122170126707118080-H4ea?utm_source=share&utm_medium=member_desktop