Waterline tile cracking on new pool

Aug 18, 2022
6
San Diego, CA
Hello -

I had an extensive pool remodel completed around March of 2019. Pool builder did all the work save the decking, which we had a separate contractor do. The concrete guy was previously a pool builder himself, had done hundreds of pool decks and was very knowledgeable. Now, three years later, I've noticed a couple significant issues:
1. Tiles in multiple places are separating from the epoxy grout as seen in attached image.
2. In one stretch of tile, the top row of the tiles are pushed forward so that that they are proud of the bottom two rows.
3. In one (seemingly isolated) area, water is leaching out into the surrounding planter bed. The shell of the pool below the coping is wet, and then the adjacent soil is wicking it out. It is not a lot of water, but it is leaking.

I've read the forums and articles around this, and it strongly suggests the pool deck is pushing on the coping. However, the concrete contractor was very vocal about ensuring separation through a proper expansion joint. His foam is 1/2 thick and extends four inches down. That is seen in the other two attached photos pre-pour. I've been in contact with both contractors and they've both inspected. Unsurprisingly, neither feel their work is responsible.

1. Pool guy. Deck pushing is the only way this happens. Not my problem. End of story.
2. Concrete guy. More willing to try to find the root cause, working in industry for 50 years, never had another complaint like this. He feels the mortar bed below the coping is delaminating. I have read about this as a possible cause also.

Other notes:
1. The pool tile is separating most aggressively in areas where there is no deck abutting. About half the pool only has gravel around it - no adjacent deck. Could the deck on the opposite side really be causing the tiles there to shift *towards* it?
2. The area that is showing a leak is the *same* area that was leaking before we did the remodel. In fact, the main reason we did the remodel is because the pool had cracked tiles everywhere, many had fallen off completely, and the crack at the waterline was completely visible. Our pool contractor was confident that the remodel would address this problem.
3. I've only noticed the tiles separating in the last couple months. The leak I described has been present for at least a year. I called this out to the pool builder when I first noticed it, and he said it was not a big deal, water was catching a grout line. I trusted him and moved on.

Pool builder says this is outside the scope of warranty because it's the concrete deck causing it. He did offer to regrout the tile, but I'm concerned that is not going to address the true problem. I appreciate any insight or suggestions people have before I seek legal counsel.

Thanks,
Brandontile crack.jpgprepour2.jpgprepour1.jpg
 
Thanks for reviewing this.

Mostly the expansion joint looks untouched, but I do see something on that last picture. Included shot of one area with tile issues but no deck around it. Final pic showing wet area with gravel and dirt dig back.
 

Attachments

  • C8F122D4-BF3A-4A15-B6DC-A0252BCFCF9C.jpeg
    C8F122D4-BF3A-4A15-B6DC-A0252BCFCF9C.jpeg
    792.1 KB · Views: 32
  • 7901F62D-6BF4-4BD8-B838-B12EE17E3BA0.jpeg
    7901F62D-6BF4-4BD8-B838-B12EE17E3BA0.jpeg
    704.9 KB · Views: 31
  • C2D80B1A-8745-42DE-8349-99639F38B562.jpeg
    C2D80B1A-8745-42DE-8349-99639F38B562.jpeg
    1.1 MB · Views: 32
From another site I got this information:

  • What causes it: The concrete deck is not completely separated from the pool's bond beam. The deck moves, putting pressure against the pool wall. As a consequence, the pool's bond beam may crack. If waterline tile is affixed to the problem area, the tile will fracture as well. Similar cracking can result from a common technique used to prepare for the coping. Workers level the top of the bond beam by applying a layer of mortar. If the material doesn't properly affix to the beam, it may delaminate, causing the tile in front of it to crack.

Not exhaustive, but suggests two possible causes. How to determine which? One is pb issue, other is concrete pour issue.
 
Why not retain the guy who did the work to fix the issue? Sounds like they know what caused this and could assist you with the fix.
That’s my issue. The pool builder and deck builder were contracted separately. Big mistake. They both feel the other is fault and I have no means of validating either’s claims. I suppose I need to hire a third party. I’m hoping some folks on the forum might have experience and suggestions on some sort of test to determine true root cause of the tile separation.
 
I will bet that your glass tile install did not follow the recommended installation of this glass tile manufacture in buildup and quality of materials used.

The planter bed, which I feel is a bad design to put next to the pool, leaching water into the pool shows there was no waterproofing layers put behind the tile.

I think your problems are more the tile installation and not the deck. But unless you specified the installation process, materials, and quality standards to the tile installer then you left to his discretion how he would do it.

The tile installers installation process may work on many other pools but does not work with your pool site.

The tile needs to be removed at least in the failing sectiosn and installed the recommended way.


https://cdn.shopify.com/s/files/1/0429/0022/6199/files/OGT-Pool-Water-Feature-Installation.pdf?v=1625588595
1626430671428-png.355575
full
full
 
  • Like
Reactions: proavia

Enjoying this content?

Support TFP with a donation.

Give Support
I will bet that your glass tile install did not follow the recommended installation of this glass tile manufacture in buildup and quality of materials used.

The planter bed, which I feel is a bad design to put next to the pool, leaching water into the pool shows there was no waterproofing layers put behind the tile.

I think your problems are more the tile installation and not the deck. But unless you specified the installation process, materials, and quality standards to the tile installer then you left to his discretion how he would do it.

The tile installers installation process may work on many other pools but does not work with your pool site.

The tile needs to be removed at least in the failing sectiosn and installed the recommended way.


https://cdn.shopify.com/s/files/1/0429/0022/6199/files/OGT-Pool-Water-Feature-Installation.pdf?v=1625588595
1626430671428-png.355575
full
full
Thanks very much for that feedback. I think my best option at this point is to hire a third party to assess and provide objective determination.

I’m just curious if anyone thinks it’s possible that expansion of the pool deck on the opposite side of the pool could cause tiles to shift towards it. That fact alone seems to defy physics such that the builder’s claim would be negated. But he says decking anywhere can cause issues everywhere.
 
I’m just curious if anyone thinks it’s possible that expansion of the pool deck on the opposite side of the pool could cause tiles to shift towards it. That fact alone seems to defy physics such that the builder’s claim would be negated. But he says decking anywhere can cause issues everywhere.

My vote is can't happen that way.
 
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.