Shower Tile Question

[Thomas K]

I think I have messed up. I hired a guy to tile my shower area. He installed 1/2" Durock on walls, 1/4" Hardieboard on floor, even in cast iron tub area. He is almost finished with the alcove and floor. He even tiled where cast iron tub will sit. He did not tape the wall joints, but did on the floor. He installed no RedGard.


He installed my expensive 12 x 24" porcelain tiles with white mastic. Did a good job, but I'm wondering if I am going to have water problems.

Thanks for any replies.