Tiling

Proper way to fix hole in shower wall

Anonymous user 23/02/2024 - 3.47 PM

I had a plumber come in to fix a chronic low pressure issue with a bathroom shower. The solution involved changing the valve and putting in new lines to it. For that, they opened up a 2-tile (8x8 inches tiles) tall hole right where the valve is. This is two year old renovation, and this bathroom in particular is and extension done then, so all materials should be new and up to code as of two years ago at least. I am getting some estimates to fix this, but would like to know what the proper/best way to accomplish this is. The existing ceramic tile is laid on top of what looks like a 1/2" concrete backer, but also includes a wire mesh on the back side (can't really identify what this might be). This backer is installed on top of drywall. Between the drywall and the backer there seems to be a blue membrane, though I'm not sure if that is part of the backer, the drywall, or just a membrane in between them. Studs are ~8" from the center of the valve, so not exposed by existing hole. My plan is to: - Scrape grout around tiles adjacent to hole (3x4 tiles for a total of 12) - Carefully remove tiles surrounding hole - Cut a larger hole on backer and drywall that avoids having seams right underneath tile seams. - Cut drywall to size, bevel edges, screw to studs, seal seams using compound and tape - Cut USG Durock to size leaving ~1/8" gap all around it, screw to studs (through drywall as well), seal seams using fiber mesh tape for concrete and thinset mortar (MAPEI Mosaic and Glass Tile Thinset Tile Mortar). - Seal all USG Durock seams (and all of the expose Durock?) with 2 coats of liquid membrane. - Install new tile using mortar (same as above) - Grout new tile (MAPEI Keracolor Unsanded Grout + MAPEI Grout Maximizer 49-fl oz Grout Additive) Any suggestions or comments on how to avoid any pitfalls of this plan would be great. Also, any suggestions for better products of you think something better is available. I have access to Lowes and Home Depot and am located in South Texas in the US. Thanks!!