I would like to update the flooring in a carpeted room, replacing the carpet with hardwood. I've removed the carpet, carpet padding, and tack carpet strips.
Underneath the carpeting was OSB subflooring that has been damaged by pet urine, so I would like to replace one of the 4x8 OSB panels, and possibly another 4x4 piece.
I've removed all the screws but it the panels are glued down (I can see underneath the subfloor from my basement). I'm also not sure if this OSB floor is tongue-and-groove, and if I need to use a circular saw to cut a perimeter of the panels I would like to remove.
I don't plan to install the hardwood floor myself, but I'd like to be able to replace this subfloor if it's feasible. Currently the damaged OSB panels are level, so I'm somewhat worried about replacing them and making the floor un-level. Is it acceptable to sand / seal the OSB instead of replacing it to cover up the pet stains?
What's the best way to proceed from here? Can I cut the 4x8 piece down the middle, in-between the joists, and pull it up that way from the glued joists? Am I risking too much unleveling the floor?