I've found that I can break out the tiles and then remove the grout from the backer. It damages the backer a bit but the new grout takes cares of that.
Side note: I forgot to install the screws to attach the backer to the plywood in one of our bathes; realizing it only after the tile was down. I had installed grout between the plywood and backer though.
Interestingly, its held up perfectly anyway for about 10 years now.
Side note: I forgot to install the screws to attach the backer to the plywood in one of our bathes; realizing it only after the tile was down. I had installed grout between the plywood and backer though.
Interestingly, its held up perfectly anyway for about 10 years now.