Our master bath shower had some loose tiles and apparently the backing board was bad. We noticed that there was a concave flex in the wall. Well tonite, it fell down, no not the whole shower, but about 10 tiles in the middle. We just purchase the home a year ago and this was probably here when we bought it be never noticed. When I pulled all the loose tiles off, the board behind it was definitely busted and the mastic looked bad. I guess they were separating from the board for some time. I felt around in there and it appears that the damage is limited to about 2 square feet. Can I repair that area or do I need to redo the entire side? Also, can I reuse the tiles or do I need to use new ones? Thanks, Pete

Do you need to apply grout to marble tile on a bathroom floor.