How to insulate hot & cold feeds if its in conduit under screed?

[ToastyToes]

I need to run hot and cold feeds in ~55mm screed to the kitchen. The majority of the run is under suspended floor but the last 1.5m will be in screed.

I’m using 15mm PolyPipe and have read I can run the pipe in conduit and screed over it. Fine, but to my knowledge, all feeds should be insulated.

How are the pipes expected to be insulated in the screed if they are in 20mm conduit?

 

[OwainDIYer]

Cover the conduit with pipe lagging before pouring screed. Will help reduce losses.

 

[Elkato531]

Presumably there is insulation under the screed so the pipe will be within the heated envelope of the house. Pipe should be insulated under suspended floor but heat loss from 1.5m in screed will be minimal.