Sand and cement screed

[Minesacarling]

I'm on a job in hale barns. On Friday just gone the screeders came and screeded the floor. The screed is about 150mm thick with underfloor heating
The floor layers have told the customer it can be tiled after 3 days as it's fast setting. Obviously I know it can't be but is there any spec I can show the customer or is there a way I can physically show him it's to wet to tile
cheers Richard

 

[J Sid]

If its wet UFH when is it being turned on ?
Will you be using a uncoupling membrane?

 

[Diamond Pool Finishers]

You could offer them an uncoupling membrane !, or use green screed Adhesive ! but its a BS standard and most of these are just good practice recommendations !! its not Law or anything , don't lose the job over it mate !! ....... hope this helps.

 

[Ajax123]

There are screeds available that will allow you to tile after just a few days. Ordinary sand cement screed at 150mm however will take in excess of six months to dry to a point where it can be tiled. It will also be one hellishly inefficient and expensive to run underfloor heating system. Additionally the underfloor heating must be commissioned and run prior to tiling. This cannot be done for a minimum of 28days following laying. It should also be cured under polythene for 7days and at 150mm should have been payed in three layers otherwise compaction will be almost impossible.

 

[Minesacarling]

Thanks for the reply guys only just been told off one of the builders it was 100mm not 150 as I was first told (if that makes any difference Ajax123)

 

[One Day]

8mm screed. When are we going to start doing this properly?! :mad2:

http://www.bekotec-therm.co.uk/2025.aspx

 

[One Day]

Oh! It's just SO expensive though! :yikes:




(sarcasm intended)