Our '96 pool is exhibiting similar issues to this post http://www.troublefreepool.com/threa...astic-and-tile
Unfortunately, I think ours is a little further along. There was a leaky sprinkler that I repaired on the other side of the pool deck right across from the widest separation (see the second photo). I'm thinking that was the main cause of the issue. Now I'm wondering what would be a good fix on the pool side to fill that gap. A fiberglass rod will go back about 12" before I hit something solid.
-foam backer rod with silicone caulk over it?
-expanding foam further back in to provide support then the backer rod and silicone?
I'll try to attach photos. (I know the tile needs cleaning and the lawn needs to be mowed too.)
close-up of deck