Ditra on Anhydrite - TilersForums.com

[DHTiling]

I have no qualms about tiling to anhydrite with cement based adhesives.... ..


So far anyway :lol:

 

[Ajax123]

Schluter favour Ardex as they have tested this themselves. They have never tested gypsum adhesives as far as I know so would not be able to comment which would usually come out as a negative recomendation.

However to be fair if the screed is properly dried and properly prepared there is no reason why a cement based adhesive should not work. I remain (as I have said many times before) uncomfortable with the level of potential risk based on experience.

 

[Gazzer]

it's a bloody minefield,wish they'd all sit round a table and thrash it out:mad2:

Yup Get them all singing from the same Hymn sheet.

 

[DHTiling]

Yup Get them all singing from the same Hymn sheet.

Will never happen .. they are all frightened to commit.

 

[Ian]

A I right in saying that Schluter recommend a contact adhesive to stick the mat down? Be it on anhydrite or S&C? Or have I just made that up! It would make perfect sense if the glue bonded to the screed.

 

[Gazzer]

Will never happen .. they are all frightened to commit.

Never mind eh....leave it to the fixer to carry the can ! :mad2:

 

[bugs183]

I'll be honest Sir i instantly stopped listening as soon as they mentioned cement based adhesives as i don't trust them on this system, someone else can tile it.
Don't worry i'm not gonna start, i was just saying what Schluter advised!!!!!! :lol:

 

[Dougs Third Go]

Will never happen .. they are all frightened to commit.

maybe they're all builders?...."tiler will sort it out"

 

[Ajax123]

Will never happen .. they are all frightened to commit.

the issue is that as we (the binder suppliers) do not make the adhesives so we have no control and cannot take responsibility for how their gear is tested or how it performs. The best we can do is test the adhesives ourselves which has often been done. we are forced by the contracts and legislation that bind us to make relatively vague and wooly comments. i have advocated the use of gypsum adhesives for quite some time and am aware of very few failures where they have been used.

It is also unreasonable to say a cement adhesive wont work because here are lots of cases when it works fine. The majority of issues come when a tiler or a builder miss out a crucial bit e.g missing out joints, forgetting to moisture test, ignoring dust and dirt on the screed, failing to prep or a combination of all.

 

[Spud]

if you make the screed why dont you make a tile adhesive for it as well ?