Hot Water Under Floor Heating On A Sand Cement Screed

[GazTech]

Thanks for all the help guys ..I have only tiled on top of electric at heating so thought i had better ask as i keep saying this site is worth its weight in gold anyone who does'nt ask ,does'nt learn . I think this lady thinks i'm trying to put the job off till after Christmas i'll show her a print off of these answers and that should at least back me up .

good thinking mate

 

[Dan]

Just bumping some threads in the underfloor heating forum. You can now find and search for both electric underfloor heating and water underfloor heating threads. By the way, if you feel some of the threads you want to be seen at the top of the forum need to be bumped back, for the next month or so from now, feel free to do that. Although it's not usually something we allow, whilst we're going through this process of changing over forum software, we see the need for this to happen.

 

[macten]

its about that..but the average screed is 30 days or so..but there are products that can be used to tile onto screeds as soon as they can be walked on..Like ditra mat.. it is a vapour equalising membrane and great for fastrack installations...and bal do a green-screed adhesive..........

Would mapetex also be fine? Also if you are using a product to fastrack tile installation over wet UFH how does that work when the ufh needs commissioning prior to tiling? Does the screed not have to still dry out naturally prior to commissioning or does a membrane mean you can commission earlier?

 

[One Day]

Would mapetex also be fine? Also if you are using a product to fastrack tile installation over wet UFH how does that work when the ufh needs commissioning prior to tiling? Does the screed not have to still dry out naturally prior to commissioning or does a membrane mean you can commission earlier?

very old thread but seeing as you asked.... I believe only ditra is suitable for use over uncommissioned ufh. others require commissioned floors. Ditra is hands down the best uncoupling membrane there is. Everything else is a lesser copy at best or repackaged roofing membrane at worst.

 

[Old Mod]

Would mapetex also be fine? Also if you are using a product to fastrack tile installation over wet UFH how does that work when the ufh needs commissioning prior to tiling? Does the screed not have to still dry out naturally prior to commissioning or does a membrane mean you can commission earlier?

I believe you can turn UFH on after 3 weeks Nick,
And if I'm wrong, hopefully someone will correct me.

 

[macten]

Thanks guys - been doing some research and luckily I'm involved early enough to have an input on the screed to be used. I've advised Flexidry screed that is becoming very popular with WUFH and is fully cured in 7 days.

 

[J Sid]

Don't know that one, got a link or some info

 

[Old Mod]

@Schlüter-Systems Ltd
Is there anything you could add to this thread to clarify things for us?

 

[macten]

Optimum drying time for UFH Screeds - The Screed Scientist®

There was also a mention of it on here ages ago:

Speed up screed drying time!

 

[Italy]

latest work, made screed with this product kerakoll.
I have placed tiles after 7-10 days.
UFH below.
http://products.kerakoll.com/gestione/immagini/prodotti/00077Keracem Eco 2016.pdf