A section of Kool deck is separating from the pool shell. Large cracks around the area. I dug under the deck to see if anything was pushing up on but found nothing.. I assumed it was b/c the corner of the deck was falling and the corner of the pool was acting like a fulcrum causing the corner to raise up.. I had a mud jacking crew come and level the deck but this did not close the gap between the pool deck and pool shell. Is this reparable if I chase the crack with an angle grinder or masonry circ saw, realign the pieces, back fill (grout, polyurethane strain relief material, or concrete?) the gaps? I need to seal the area to prevent water from getting behind the pool shell..
Ay help would be great..