Hey, on a different thread, one of you guys was mentioning the apparent poor quality of the plywood used as subfloors in my renovation. For more than a week now, we've been noticing a squeak in select areas (about three total) in the vicinity of the girder that runs through the center of our condo unit. It turns out when our contractor sistered the joists he forgot to put a piece of wood over the girder to make it level with the adjacent joists. Now the contractor has been making holes in the two affected areas, some 20-30 by now, and shooting in foam insulation, in an effort to reduce the squeaking. The squeaking is live and well - nothing has changed. The contractor has also been saying some of the squeaking will go away when we put the rubber and floor on top. What should I do? Can I try to get a warranty from him that the floors won't squeak, just like I did with the bath tub he butchered? Or am I pretty much screwed if I keep this subfloor? What should I put in the warranty, i.e., is squeaking my only concern? Do the subfloors need tongue-in-groove? How to fix the squeaking? Can he pull the affected plywood out and try to fix the problem? My contractor says no, explaining that the plywood is attached to the joists and that he could compromise them. Is the quality of the plywood insufficient for a subfloor? I've attached pictures. Finally, I want to get an independent inspector to look at the work - who normally does this? Are there registered inspectors, or should I use a contractor? Do you know any inspectors in the Westchester, NY area?