After the mix up with the insulation thickness (managed to get it swapped out, even after 4 months, very lucky!), we finally put it down.
The foam insulation is super easy to work with. Lightweight, easy to handle. We essentially made our own jigsaw.
The new water pipe complicated the design, but we got it fitted in the end. The joints all get taped with foil tape to maintain the barrier, and it keeps it locked in place a bit better.
The edges get filled with a dry mixture of sand and cement. It packs the sheets in tightly and leaves no gaps for the screed to sit on.
We have one of the above paint mixers, mostly for mixing paint. Sometimes polyfiller, etc… it slots into the drill, and does its thing. In the 30degree heat, mixing by hand wasn’t very appealing, so, we hooked in the paint mixer to mix our sand & cement mix – all 300kg of it. This is what happened to it:
Hopefully this week, we’ll get the underfloor heating pipes, and the liquid screed done!