Our residential building had a roof leak arising from teenage neighbors who punctured the membrane. When we received quotes from 4 contractors, all 4 wanted to do additional repairs. This contractor claimed to have recalled the termination bar, to have patched deteriorated surfaces with Alsan, to have dried and cleaned ponding water and inspect the membrane underneath, to have sealed the membrane in the area of ponding with Alsan (in my opinion, not the way to go here), to have removed the debris on the roof preventing draining.
From what I can see, they put down a few sloppy Alsan patches and didn’t even bother to remove the debris. The final charge was over 4 grand! The boss was not there during the work, so this could be errant employees. However, he is insisting that the bill be paid without coming out to see the work himself.