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Question:

do i have to use cement board under tile on a shower wall?

do i have to use cement board under tile on a shower wall?

Answer:

Cement board, Denshield, or Hardibacker board , all with a vapor barrier behind it is the best and longest lasting products to use. DO NOT use green sheet rock, especially if its a straight stand up shower. IT WILL NOT LAST.. In a tub/shower, I ve found that the average green board lasts about 7 years at best in a well used shower. There is also a product called Detra that can be used in a shower but I personally have never used it. Any questions you can e mail me through my avatar and check my qualifications there. GL
May 11, 2017
It would be a good idea to put some water proofing under the cement board. Cement board is only somewhat water resistant. Some types are worse than others. But if you put roofing felt behind the cement board the wall is much more water tight.
May 11, 2017
there are two options -- cement board OR the green sheetrock board that resists mold and moisture ask the commercial desk at the local Lowe's or HoDepot what is the best product for your area they also have tile classes to help you do the correc
May 11, 2017
Yes, unless you want to replace the tiles again. Anything else will be subject to moisture and flexing. Those conditions will cause the tiles to fall off.
May 11, 2017

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