I wouldn’t use plywood. Even marine grade can get waterlogged if water gets in. Coosa is the way to go.
The tiles shouldn’t be what’s sealing the bottom of the shower. There should be liner or Pan
Poor installation. Just like so many builders can’t handler condensate drain and run the hoses too flat.
It all comes down to the quality of the installation. the number one cause of insulation failure and condensation is of the insulation is...
I love chillers. One the best upgrade I did to my ole 53 was installing chillers 3 years ago. Never had an issue with them. I have two chillers...