Anhydrite screed prep - Tile Advice

[nlodge13666]

Hi guys technical question hoping maybe you have an answer as I have never came across this before we have an anhydrite screed floor we sanded it hoovered then sealed twice came In Today and the sealer looks like it’s peeling in certain areas have u ever had this the floor is completely dry Obviously before laying any ditra I need to find an answer to this hoped you may have an answer as my tile supplier doesn’t
Thanks in advance

 

[Dave]

Hi. How long has the screed been down and is it heated ?

 

[nlodge13666]

Hi. How long has the screed been down and is it heated ?

Yes heated screed been down for 6 months I’ve moisture tested and the highest reading was 0.5 so very low throughout I think the problem was a Labourer at the job walked on the primer whilst tacky and it’s pulled areas up so on my return It looked like it had peeled but on returning today after running down and re priming it has grabbed properly

 

[bsc ceramics]

What primer did you use on the floor?

 

[Dave]

Yes heated screed been down for 6 months I’ve moisture tested and the highest reading was 0.5 so very low throughout I think the problem was a Labourer at the job walked on the primer whilst tacky and it’s pulled areas up so on my return It looked like it had peeled but on returning today after running down and re priming it has grabbed properly

Ok. Hopefully it’ll not to neat a mixture . Has the heating been commissioned yet.

 

[nlodge13666]

What primer did you use on the floor?

Palace Tiler’s primer And I only used this because that’s what we always use from my local supplier but I made a sure it was ok and I got them to check with the palace technical department who said it’s ok to use with anhydrite screed so