ceramic wall tile

Old 05-02-01, 10:27 AM
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I would like to know if I should use silicon sealant or grout to seal butting corners in a shower?The wall backing is greenboard,and I am using an acrylic mastic.

[Edited by daweiner on 05-02-01 at 01:44]
Old 05-03-01, 05:49 PM
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Location: Katy (Houston area) TX USA
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You're not supposed to be using greenboard as the backer in a shower.

Old 05-03-01, 09:59 PM
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Every corner..on walls...ceiling..and floor..has to be caulked with silicon...and John is correct...green board is good for nothing in a shower...unless you like repairing your shower every 2 years... and if you notice mold growing..the shower is leaking.

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