Underfloor heating screed with Grano

[IsmailYPatel]

Hi. I'm after some advice. Need to screed above my underfloor heating pipes. Some rooms have overlay boards and some rooms have new concrete and the floor will be chased/milled out for pipes to go in.

Is it possible to make screed with grano, sand, lime, concrete fibres and cement? Make a wet mix so its nice and runny and then pour that over my pipes and level out? Looking at putting a 10-15mm screed.

Any advice on what the best option is?

 

[Ajax123]

Quick answer is no. You need anti shrink admixtures/additives or it'll shrink and fall apart. At 15mm depth you are looking at specialised materials with high plasticity and shrinkage resistance. You could look at something like Gypsol TS-15 screed (shameless sales plug)

 

[IsmailYPatel]

Ah ok

Ill just use this stuff which I can get locally