Concrete Interior Tile Subfloor Install Question
I have new construction 7/8 large profile concrete paver floor tiles installed, and they are cracking with long runs, as is the grout. (The cracks coincide and run along the subfloor joints.) The joists are correct 16 oc I believe. So I don’t think its a deflection issue. The tile was laid on Advantech OSB 3/4”, 1 layer, with a Prodesco uncoupling membrane. My GC says this is perfectly fine installment and standard ASTM.
Any tile engineers or professionals want to chime in here because I’m at a loss of what to do. I’ve read the ASTM guildelines, I’ve researched, called the Tile Council, the manufacturer. GC is saying it’s a problem with the tile not the installation.