"Blisters" on one side of the pool

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husky
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Joined: Fri 10 Feb, 2017 04:58
My Pool: Indoor fresh water pool, 15m x 3m x 1.5m, ceramic-tiled (mesh-backed, epoxy-grouted), retractable cover, kept at 29C (84F), Heatstar air-handling unit. Retractable bench 3m wide with air-bubble supply.

"Blisters" on one side of the pool

Postby husky » Fri 10 Feb, 2017 05:35

An indoor fresh water pool, 15m x 3m x 1.5m, ceramic-tiled (mesh-backed, epoxy-grouted) with a retractable cover, kept at 29C (84F). It is 4 years old.

One side of the pool developed "blisters" with the tiles lifting in irregular areas up to 10"x10" each. There is no pipework in the 10" thick wall, which is freestanding.

https://youtu.be/aqKlEmwPLRM

What is the cause of the tiles lifting? How do I solve it?
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