@@royalgraniteandinteriors wet pack concrete I'm guessing Portland lime n sand, and a lot of loose thinset. Seems like you guys have a 2" base minimum to level tiles and have a solid substrate after it all cures
@@royalgraniteandinteriors USA. Usually thinset is 'thin' meaning about 1/4" over the substrate (cement or cement backer board or ditra (plastic waffle)) Here it looks like they are pouring a slab and setting tile at the same time.
