I'm in the middle of replacing the tile in my bathroom and started to take off the backer board but now I'm wondering if I should've just cleaned off the top of the boards and reused it. The backer board is nailed to the floor over thin set.
Both processes seem like a pain. Would you continue to take off the cement board or patch a 4'x6' area with new cement board and then scrape off the old tile's thin set on the rest of the surface?