Newcomer here. I have a question about my spa overflow waterfall is constructed.
There are three steps on the waterfall, all tile/grout on the vertical and horizontal surfaces.
I lose 500 gallons per week. I have isolated it to the waterfall itself. I've conducted several bucket tests, pressure tests, etc. The leak is present when water is running over the waterfall, even when it's just a garden hose with no pressure in the system. The leak is not present when water is running across a liner on top of the waterfall.
I have regrouted, and applied grout sealer, but it has made very little difference.
There are no cracks in the tile, but I suspect if I tear out the tile, I will find cracks underneath in the concrete base.
If I were to tear out and replace the tile, how can I ensure I fix the leak? What is the best material to use to seal cracks in the concrete?
Are tile waterfalls sometimes built like tile shower stalls using some type of lead, rubber, or plastic liner?
I may decide to remove the tile and replace it with a tumbled stone creek looking arrangement, but whatever I do I want to be sure the leak is sealed.
Thanks for any thoughts.