Tile and grout are not waterproof
This is the part most homeowners do not realize. Tile is water-resistant. Grout is porous. Caulk is a temporary seal. Water that hits a shower wall makes its way to the surface behind the tile, and the only thing keeping it out of the framing is the membrane behind the wall.
What a real waterproofing system looks like
A sheet membrane (like Schluter-Kerdi) or a quality liquid membrane covering every wall, the curb, the niche, the bench, and the floor pan — with reinforced seams and corners and sealed pipe penetrations. That is the system. Without it, the shower has been waterproofed “by hope.”
How failures usually show up
Soft or stained ceiling on the floor below. Loose tile. Grout that never dries. Peeling paint on adjacent walls. Musty smell. These are not “grout problems” — they are signs water has been getting behind the tile, probably for years.
Why regrouting is not a fix for a leak
If your shower is leaking, regrouting is cosmetic. The leak is coming from behind the tile. You can not fix a failed membrane from the outside, no matter how good the grout is.
What the right answer usually is
Open up the affected wall. Inspect. Replace any wet or rotted substrate. Install a proper waterproofing system. Tile over that. It is more work, but it is the only fix that actually fixes the problem.
Related services
- Shower Waterproofing — A real waterproofing system behind the tile — not just grout and hope.
- Shower Tile Installation — Custom shower surrounds built on a real waterproofing system — niches, benches, and clean layouts.
- Bathroom Tile Installation — Floors, walls, showers, tub surrounds, and full bathroom renovations done right.
- Regrouting — Old, cracked, or stained grout removed and replaced — done the right way.
Service areas
This article is most useful for homeowners in: