Grout is designed to be a water barrier between tiles and stone. Over years of use and using cleaning chemicals, grout will deteriorate, dry out and become cracked, broken or missing.
At this point, the area should be re-grouted. However, gone unnoticed for a prolonged period of time, water will penetrate into the substructure causing the adhesive on the back of the tiles to loosen and eventually fall off the surface. In extreme cases, the walls will absorb so much water that new wallboard will be needed.
What Do We Do in Water Damage Repair
- Remove tiles from damaged areas
- Remove wet wall
- Rebuild the wall using cement board, instead of greenboard (cement board is much more water resistant)
- Clean off tiles – re-adhere and add grout.