Ditra on Anhydrite - Tile Advice

[Gazzer]

So if you were using the Ditra over Anhydrite/Gyvlon type screeds what adhesive would you be using to fix the mat down with ?

 

[DHTiling]

Flexi cement based.

 

[Ian]

Only done this once Neale, used Creative Impressions GBTA to stick the mat, still sanded, hoovered and primed the floor first though.

 

[Ajax123]

GBTA or gypfix prepped as normal

 

[Gazzer]

Does anyone know Schutlers word on this ?

 

[DHTiling]

Do schluter recommend that type of adhesive.

I did read they did not..

 

[bugs183]

I asked them on the Substrate Training day and they were very cautious, they favoured an Ardex cement based adhesive.

 

[Gazzer]

Do schluter recommend that type of adhesive.

I did read they did not..

Yeah thats what i thought too.

 

[Gazzer]

I asked them on the Substrate Training day and they were very cautious, they favoured an Ardex cement based adhesive.

was that a SPF or standard ?

 

[Dougs Third Go]

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

 

[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.