I wasn't happy with the install of the existing 3/4 TG plywood subfloor in one of my rooms so I pulled it up and plan to reinstall. Unfortunately most of the tongue broke off during removal. The face of the plywood is in good shape so I'm wondering if it would be acceptable to trim off what remains of the tongue and just screw and glue the same plywood back down. I could even put biscuits between the sheets if it's that important to create a strong joint. If not I can just suck it up and buy all new if I have to. Just hate to spend the money if I don't have to.

Who uses T&G for underlayment? Cut it off.

http://www.hardwoodinstaller.com/hardwo ... floors.htm