glass tile on new shower floor looks dark/blotchy when wet
I just had a new shower put in the guest bath. The shower floor is glass tiles. The tile was very expensive. I ran the shower for the first time on Sat. The tile in areas turned dark. It is still dark 3 days later! The shower floor looks blotchy. What is wrong? The installer is going by to put sealer down tomorrow. Is this supposed to happen with glass tiles? Is this a mold risk? I am hoping that he did nothing wrong with the installation.
I also had a tile crack on the wall a couple weeks after installation. He said it needed a membrane behind it. I had to order new tile and he re-installed the piece. I dont understand any of this. Should there not already be a membrane?