First off, thanks for all the great advice I've been reading here.
I have a cantilever concrete deck, ie the decking extends out over the pool about 3 inches. There are no coping stones.
My problem is this: there is an irregular gap between the deck and the tile stones below it. The tiles are some sort of mica-like stone in what must be mortar.
The gap between the stone tiles and the deck is approx 1/4 to 1/2 inch around the entire pool. I realize it is a good thing they are not attached so as to avoid cracking the tiles. However, this gap is the home to many spiders, crickets, ants etc etc. I also suspect that during rains moisture may be running beneath the decking into the pool.
I can't imagine there is supposed to be an open gap like this. The pool is probably about 8-9 years old. Can a gap like this be filled with a flexible caullk or mastic of some sort?