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Discuss Underfloor heating screed with Grano in the Tiling on Underfloor Heating area at TilersForums. USA and UK Tiling Forum

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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?
 
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Ajax123

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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)
 
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IsmailYPatel
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Ah ok

Ill just use this stuff which I can get locally
IMG-20221128-WA0017.jpg
 

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