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Old 08-15-2019, 01:37 PM   #1
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Join Date: Jun 2005
Posts: 55
Cracked tile

The first course of tiles directly above the tub flange on a three year old job have all cracked. These are 4x8 tiles and the cracks appear to be on the backs of the tiles and not all the way through. They are off white tile . The re is mold beginning between the tub and tile that cannot be removed ; Iíve tried everything. The tile is set on cement board painted with green redguard( if that makes sense). What to do here? Do I remove the tile and repaint with more green redguard and retile ?
Many thanks,
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Old 08-15-2019, 02:22 PM   #2
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Redgard is a specific name (trademark) for a product made by Custom Building Products. https://www.custombuildingproducts.c...-membrane.aspx

It only comes in dark pink and light pink, both of which dry to a deep red.

There are some companies that make a similar product that comes in green. Not sure it really matters which you have, but it is good to know.

Are you aware if the entire walls were coated with this stuff?? Are you aware of what KIND/brand of backer board was used??

Do you know how the tub flange was tied into the backer board and green waterproofing?

Do you know what kind of mortar was used?

Do you know if it was applied evenly or if globs were spot-bonded?

All questions that will help people make sense of this. Pictures also speak volumes.
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Old 08-15-2019, 02:28 PM   #3
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Location: Boerne, Texas
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Welcome back, Salie.

Is this perhaps a redo of a bath with which we were previously familiar?

Your chances of successfully removing the tiles without damaging the Hydro Ban are approaching zero if the tile were installed even close to correctly. That means the likelihood of your being able to repair the waterproof layer is very slim and at the worst possible place for that in your tub/shower installation.

Those stress fractures (what I think you're describing) are most likely the result of lack of movement accommodation in the wall(s) in question. Photos of what you've got might be helpful, but for certain we'll need more information on just how the shower was constructed, beginning at the wall studs.

Also helpful might be knowledge of the specific tile you have. Brand name, make and model.

My opinion; worth price charged.

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