I have a second floor that squeaks, a lot.
Attempts at using scored screws haven't helped much, and the carpet is due for replacement, so there is little concern about pulling it up.
A contractor has mentioned that approaching the floor from below will be quite expensive, as it would be a sizeable amount of sheetrock to replace on the ceiling below. Considering the carpet replacement, he recommends cutting up the flooring from above and replacing the plywood decking with new that will be secured to wood screwed in to the existing joists.
Is this a typical approach? Perhaps there is more that was unsaid, and if so, what might be his concerns?
The room also suffers from a severe lack of sound proofing to the floor below which features the TV. He feels we can also install sound dampening insulation from above while doing the work.
Assuming that everything goes as well as could be wished, what items should I be looking for to raise or calm my concerns?