I have a two year old tiled shower with glass enclosure. The grout is sanded grout. The exterior corner of the shower curb is leaking a small bit of water after every shower. Over time it has corroded the paint and molding that butts up to the tiled curb.
The leak is through the grout. No water exits on top of the curb.
The shower enclosure is caulked with 100% silicone in the places specified by the installation instructions. The only weird thing to me is that the bottom channel sits directly on a grout line. I'm wondering if water is seeping into the grout and working its way outside.
Any ideas what could be wrong? Pictures show leak location on exterior of curb and the opposite interior side of the shower curb.