I am looking for recommendations on material to use to seal both the inside weir wall (spa side/positive pressure side I think ) and the outside of the wall (negative pressure side). I want to ensure my builder is doing everything he can to prevent all the known issues with weir walls and infinity edges. Specific recommendations on products and techniques would be greatly appreciated. I am located in Houston, TX and the top and outside edges of the spa will be covered in glass tiles.
My spa sits on top of my sun shelf which will have about 8 inches deep of water all the way around in the 10 inch wide trough.