UFH, Drying times and Rapid setting screed

[Middlesex Tiles]

That is what I have read too - but I can't see if it is affected by the commissioning of the UFH?

 

[LM]

TOPCEM - Substrate preparation - Products for Ceramics and Stone Materials - http://www.mapei.com/GB-EN/mobile/product-detail.asp?IDMacroLinea=0&IDProdotto=207&IDTipo=1614&IDLinea=1
MAPECEM - Substrate preparation - Products for Ceramics and Stone Materials - http://www.mapei.com/GB-EN/mobile/product-detail.asp?IDMacroLinea=0&IDProdotto=201&IDTipo=1614&IDLinea=1
This is how we get round it and it works.

 

[Flintstone]

You can fast track with ditra after only a few days, but not with underfloor heating as it must be commissioned which takes time

 

[Matthew77]

You can fast track with ditra after only a few days, but not with underfloor heating as it must be commissioned which takes time

I think this is the conclusion I’ve come to. I’m going to speak to the fast set additive company Monday to confirm but they are saying it can be tiled on after 2 weeks. I’m now thinking that the screed will be dry before the heating has been commissioned! I understand the heating can start to be commissioned after 1 week of the screed being laid, then taken up in increments of 5degrees a day until at target temp then left at target temp for 3 days then gradually taken back down in increments of 5degrees a day?
Can someone confirm this is right? I’m guessing this process will take more than 2 weeks to complete, can someone with experience with underfloor heating commissioning please chip in and maybe speculate how long this process usually takes?
Thanks

Matt

 

[Flintstone]

I have a job coming up at the end of the month, which was poured Friday just gone over ufh. It’s a chemflow fast drying screed, similar situation to yours, I’ve given my advice but the screed company say they can commission the ufh after a few days, or 7 days and it will not crack, so as long as they commission it, I’m fine to dural it and tile In 3 weeks, in my opinion.