I am trying to install 3/4 solid hardwood floors in my house but have run into the problem of a 3/4 dropped in one area of the floor just 32 inches over from the high spot. It is not a sag in the subfloor between the joists but appears the floor joists are not all the same size they vary by a 1/4 inch and some are slanted and bowed. I was thinking are sister the joist due to allot of bounce in the floor and trying to set the joist straight while I sister them. Does this sound like an a good plan? Also is there any way to remove plywood(subfloor) that has been glued and nailed to the joist.
Also all the joist are level on the bottom perpendicular and long ways.