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Unread 05-19-2021, 12:17 PM   #1
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Pool waterline tile falling off!

I re- did the pool waterline tile myself and my tile will not stop falling off. I have read maybe its because I used grout/thin-set on the line in between the waterline tile and the concrete coping? Please help me!
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Unread 05-19-2021, 01:28 PM   #2
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those cracks by the tiles look like they are allowing water to get behind the tiles causing them to pop off. Also did you put a new urethane bead by calking where the tile meets the coping. If you didn't this can also can cause water to get behind the tiles and cause them to pop off.

Also did you remove the old thin set and then acid wash it to remove any remaining dust and debris?

I am not a tile guy but I have owned pools all my life.

Also look to see if you have any delaminated coping this can cause issues as well.

As I said not a tile guy, but have run into issues like this before and this is what I was told. I am sure there is someone on here with much more knowledge than me. But how you prepared the surface and what you used to set the tiles would probably be helpful.

Last edited by TheEdge91; 05-19-2021 at 01:45 PM.
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Unread 05-21-2021, 10:12 PM   #3
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Those cracks behind the tile are most likely caused by the poured concrete deck over the pool bond beam. There is a specific method to doing that and a lot of concrete and pool contractors overlook that or just don't have the experience to know. Before the concrete is poured the bond beam needs to be leveled and a slip sheet is placed between that and the concrete pour. I've done a few repairs on the same issue.

As for the tile on top of the spa wall, if that's what it is, it looks like the tiles might not have been bonded properly. Those dark tiles though will get hot under the sun and expand and contract and can be an issue. I'm guessing the tile is mesh backed? That can be a problem as well. I've seen mosaic tile with mesh backing that were so covered in mesh and mesh glue that less tha 50% of the tile can actually come into contact with the thinset.
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Unread 06-01-2021, 06:30 AM   #4
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Glass tile is very unforgiving and not all is created equal. Best of luck with any repair endeavors. Depending on the coping detail, may benefit from having a flexible joint between tile and coping, required if it’s cantilever concrete. Let us know what ya wind up trying to do, more pics during demo can help us see what ya got behind the scenes
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Unread 06-02-2021, 04:30 PM   #5
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The typical chlorine in a pool may not be all that compatible with some of the modifiers used in some thinsets...I'd want to contact the manufacturer involved to see what they may recommend. Having a grouted joint to the top coping won't help, either. I think I'd either caulk it, or use an engineered profile there that provides for expansion. A profile would give that edge a clean line, but caulk might help fill minor variations.

Glass can be tough to bond when there can be some significant thermal stresses, then throw in the chlorine...
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