How To Fix Cracked Grout In Shower Wall. Bathroom tiles that have cracked grout are more than unsightly, they can also result in damage if left unchecked. Cracked, brittle shower grout is an open invitation for mold, mildew and stains to set up house.
Over time, water dribbling into the wall can cause dry rot, mold, and. Most of the grout cracks are on the left (shower head) wall. Water that gets behind tiled shower walls ruins drywall and can rot framing.
The grout cracked because there is movement, not too much of a problem at changes of plane but on a flat wall, that's real bad.
Do not attempt to use any carbide or off brand bit to remove the old. Cracks in your grout are often caused by shrinkage, improper grout choice based on joint width and worst case is the structure can't support the weight and it will have to all come out to fix the captsmethwick wrote: Possbile leak in shower neck. You may be able to patch a hairline crack, but a bigger break will need a use a handheld grout saw around the edge of the cracked tile to scrape away its grout and prevent damage to adjacent tiles.