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

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.

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

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