E
ecopaddy
Recently a job was completed for me and I'd like some advice if possible.
Floor comprises of a poured anhydrite calcium sulphate (gypsum) screed. The tile adhesive use was BAL Rapidset Flexible adhesive and the adhesive was applied directly to the floor screed. Recommended primer such as BAL Prime APD was NOT applied to the surface. Before you say, why wasn’t the primer applied, the job is now completed and I am looking for the best way to deal with the situation.
I have been informed that there may be a reaction between the calcium sulphate screed and the Bal adhesive as the Bal adhesive contains Portland cement and ettringite failure may occur.
The tiler that completed the job has informed me that he has never see any issues with BAL Rapidset Flexible but I do not think that the gypsum screed is something that he has applied tiles to before.
My question for you experts is, what are the chances of a reaction occurring and the tiles lifting off the floor. Would you take all of the tiles up now, prime the floor and refit or take the wait-and-see approach as perhaps there is a very small chance of failure occurring and the refit of everything now may be and unnecessary step not to mention very expensive.
Thanks,
Paddy.
Floor comprises of a poured anhydrite calcium sulphate (gypsum) screed. The tile adhesive use was BAL Rapidset Flexible adhesive and the adhesive was applied directly to the floor screed. Recommended primer such as BAL Prime APD was NOT applied to the surface. Before you say, why wasn’t the primer applied, the job is now completed and I am looking for the best way to deal with the situation.
I have been informed that there may be a reaction between the calcium sulphate screed and the Bal adhesive as the Bal adhesive contains Portland cement and ettringite failure may occur.
The tiler that completed the job has informed me that he has never see any issues with BAL Rapidset Flexible but I do not think that the gypsum screed is something that he has applied tiles to before.
My question for you experts is, what are the chances of a reaction occurring and the tiles lifting off the floor. Would you take all of the tiles up now, prime the floor and refit or take the wait-and-see approach as perhaps there is a very small chance of failure occurring and the refit of everything now may be and unnecessary step not to mention very expensive.
Thanks,
Paddy.