Bellitex Flow Screed

[jasonj]

Hi all

I know I'm not a regular poster on here but would be grateful for some advice on a flow screed.

My colleague is tiling a large floor that has been filled over the ufh with Bellitex floor screed made be Tarmac. The screeder has advised us that this Bellitex screed takes 21 days to cure and does not require any scalping of the top 2mm of latency and does not require and priming.

We are a little dubious on this advice although he is a trusted screeder but he says his advice is as per manufacturer guidelines. At the moment we cannot get through to the manufacturer.

Has anyone tiled on this screed before and not removed latency or primed?

I would be grateful for any advice. We will be using Ultra Proflex (blue bags) for fixing as per specs for the job.

Thanks in advance.

Jason

 

[J Sid]

welcome, have you contacted your adhesive manufacturers, Ultra, for there recommendations for fixing to this screed? And there recommended adhesive

 

[Tile Shop]

Depends which one. Just googled it and they do Belitex Topflow Screed A which is Anhydrite, so will require the laitence removing. Or there is the Topflow screed C which they claim to be Cement based. (guessing thats what the A & C stand for..... yeah, check me out for being brainier than I look )

Judging by what the website says, it looks like he as the cement based one as it say 14-21 days full curing and walkable after 48 hours but double check to clarify which one it is, then speak to Ultra.

 

[SJPurdy]

After curing the UFH will need commissioning before tiling and as it is a "large floor" movement joints will also probably be required.

 

[jasonj]

After curing the UFH will need commissioning before tiling and as it is a "large floor" movement joints will also probably be required.

Thanks everyone for your replies. The floor has been commissioned and expansion joints as per architect specs.
Managed to speak to the Tarmac rep and he advised although the screed is cementitious and there should be no latency with the Belitex product it's good practice to remove and prime.

Ultra have ok'd the adhesive. It is the cement based adhesive C not anhydrate A.

Thanks again for your advice.

Jase