Working on a DIY pool install and looking for some opinions/advice on installing coping stone (24x12x2) to the top of the steel wall on a vinyl pool.
My original plan was to pour a 12" concrete footer around the perimeter of the pool and float some concrete onto the top of the wall. So 6" of concrete footer plus 5" floated onto steel wall. Then attach the stone using thinset like in this picture:
However, a concrete guy comes out and thinks that's a bad idea as there will only be .25" of concrete at its thickest point in the angle (see pics below) and it wont adhere to the top of the steel wall very well. Due to the differences in expansion rates the concrete guy feels lifting of the coping stone will be much sooner rather than later.
Called the brick yard for their opinion, and they suggest pouring a 6" footer...do not float concrete onto wall as they agree with concrete guy.....and use silicone or elastic caulking to secure the stone to both wall and 6" footer.
One of my largest concerns with the adhesive method is getting the stone level. I also don't really like the idea of numerous 40lbs stones resting directly on the coping channel. I fear that the channel may get crushed in and prevent liner removal.
Here's a pic: the wood represents the stone - ignore the overhang into the pool I marked the wood for 1'. Here we can see the angle (.25" per foot) and the void underneath (.25" at the thickest). The extra piece of channel that the wood is resting on over the gravel represents the eventual grade.
Here is a pic of the actual stone:
Any and all suggestions are greatly appreciated!!!