Problematic Anhyrdrite floor!

[Ajax123]

alan. if you get a chance could you post why these screeds are so much better or fast track than normal ones.
its true they are quick to lay but unless they can commission heating and force dry as soon as recommended then there is no saving in time that i can see at all.
As i posted yesterday not one of the contractors who have had these screeds laid on which i have laid tiles have gone back for more of same.
They all tried it because they thought it would same time and hassle but it does not seem to work that way.
i think you are doing a great job helping educate tilers about how we should approach these screeds.
few years ago i was certainly not getting this type of information from screed companies.
but in my eyes it still does not make them any better option than sand/cement fibres .
in addition there are these screed accelarators now which dont cost that much and most of the contractors i work for on new builds use this method now.

I shall take up your challenge when I have time later on jonnyc.

 

[Perfect Tiling]

Hi Guys...just an update on the actual job that started this thread. I carried out a moisture check using a hygro box that was leant to me by a vinyl floor fitter who tests before doing his work. I left it on the floor for 3 days and checked it this morning...it came up with a reading of 90% RH. The test the joiner did prior to laying an oak floor cqame back at 70% RH...4 weeks ago!! Either the readings are wrong or the house has a plumbing problem. All the travertine is still solid and the heating under those areas is still off...I assume that the moisture...if any will be able to get out through the travertine even with the floor primed with acrylic. I took up a small cut of travertine today to see how well it was stuck and it came up after a couple of good chisel strikes...with about 5mm of the screed attached to it...surely thats a good sign and agiain IMO points to the customer cranking up the UFH.

 

[Ajax123]

Chers Alan. Us it same screeners.

If that means is it the same screeders then yes... Otherwise please translate ;p

 

[DHTiling]

If that means is it the same screeders then yes... Otherwise please translate ;p

LOL.. Iphone auto correct ..

I meant lafarge using the same screeders as before , but i know the answer now anyway..

 

[Master]

Hi, the travertine is more hygroscopic than porcelain

 

[Mark S]

Hi, the fact that it took a couple of hefty chisel strikes, and some 5mm of screed indicates a good bond, again looking like the UFH was cranked up too quick.

 

[Mark S]

Bugs, as you mentioned the screeders are not being regulated!!!
more often than not a poorly installed anhydrite screed is the root cause of a lot of issues, and the actual screed. There have been too many people that have bought a pump and are now screeders!!
Sand cement screeding is a skilled trade, like tiling or plastering, installing a flowing screed requires an equal ammount of skill, preparation and workmanship, which far too often is missing these days.
But every time the screed gets the bad rep, and not the guys that put it in, who are oftern long gone and have been paid, the rest of us in the industry then have to carry the can.

 

[bugs183]

Ok Mark i see your point regarding the installation of the screed itself, but If these screeders aren't doing a good job, DON'T sell them the screed, as the implications of these guys doing a poor job (which is most of the time), is wrecking/has wrecked the screeds reputation.

The screed material could be amazing, but at the hands of poorly trained or lazy screeders it's a poor product, and people will go back to conventional screeds.
It's like me sending some numpty round to tile someones house, being told he's done a bad job and saying well the tiles and adhesive are ok, and send him off to do another job. It shows a if i'm honest total disregard to the end user.
There really is so many issues here that people need to talk to you guys face to face to express our many justified concerns.
It's nothing personal, it's just the product.
Look at these threads there is only one guy here who has said he's confident in these screeds, that's not a good percentage.

Sorry for having a bee in my bonnet, but i'm a floor tiler, with a good reputation. Failing floors, whether it's down to adhesives, residual moisture or poor screeding turns that into a bad reputation, i don't really want that.

 

[Mark S]

Totally agree,
however I'm not selling rge 'screed' to the screeders, neither is Ajax, we, or the companies we work for, supply the binder for the screed production. The people or companies selling the 'wet' screed are Lafarge, Tarmac, Bardon , Cemex, + some independants.
There used to be years ago a licenced system in opperation to regulate and monitor the screeders, maybe time to resurrect that!!

 

[Ajax123]

Regular audits perhaps.... Something I had thought about before....