Can we overlaying existing shower wainscotting?
We are doing general remodeling of our 25 years old home. Because of limited budget, we are postponing our master bathroom shower. This shower is tiled from floor to ceiling and the tiles show discoloration which cannot be cleaned any more. The contractor suggested that a complete demolition of the tiles and wall boards and reinstalled with granite slabs. About a week ago, we went to an open house of an older home and found that they have overlaid existing tiled shower and bath with new 13"x13" tiles and cut slivers or narrow tile strips to cover the edge. The job is nicely done. So here are questions for overlaying the existing shower wall and floor.
1. I read advice from others on how to overlay kitchen counter. They use hardibacker to provide a surface for the tiles to adhere to. The hardibacker is glued and screwed onto the plywood substrate without removing the old tiled surface. I wonder if I could do the same by gluing the hardibacker onto the existing tiled wall.
2. What kind of glue I should use to hold down the hardibacker? Liquid nail?
3. What about applying screws, I gather that I cannot put any screws to hold the hardibacker at the level of the water spray?
4.Could this be overlaid with granite tiles?