I had my pool installed 3 1/2 years ago. Had gorgeous travertine deck installed. From that time on have had sinkage issues. I mean seriously. 6 months after install started to sink including putting my foot all the way through to about 7 inches. I nearly broke my ankle. PB came out three times over last few years to fix this problem, each time assuring me wouldn't happen again. Now it has sunk again in places, at least an inch. PB is refusing to pay for the fix, but says he will pay for 'half' of what his paver subcontractor is charging. That still means $600 from my pocket. I am frustrated and upset beyond belief because I do believe something wasn't properly done during the install. He says its way beyong the workmanship warranty... but this has been happening all along since installation. should I hire an engineer to inspect for structural defects? Any ideas how to resolve this would be appreciated. I would prefer to not go to court over this, but we are in confilict and both see it differently. PLUS this will be a huge expense if I need to have this $1200 fix done every year. Help!