I am having my bathroom renovated professionally. Is it okay to have a crumbled edge in the cement board that causes a small gap where it meets the tub? Or does it need to be replaced?

  • A picture is worth a thousand words. And you don't have enough words to provide a good answer. – feetwet May 15 '15 at 0:18

That gap should be filled with grout or mortar first before the waterproofing (probably RedGard or some other paint-on rubber thing) is installed.

  • 1
    The rest of the joints too, bedded with fiberglass tape – Jack May 5 '15 at 3:26

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