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Unread 02-09-2019, 03:57 PM   #11
cx
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Join Date: Jul 2001
Location: Boerne, Texas
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Renee, go to our Liberry and find the Shower Construction thread. In there find the article titled Making Deck Mud. That's the material he should be using to make the tiling substrate and it should be an absolute minimum of 3/4" thick over a cleavage membrane (polyethylene sheeting or roofing felt) and expanded metal lath and it should be dead flat.

One of the reasons for using deck mud is because you can make the surface nearly perfectly flat. You can also make it level if you want. But you should certainly not need to flatten the surface when it's finished. He should remove what is there and do another mud bed correctly.

My opinion; worth price charged.
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