From our experience of cleaning and restoring showers, we find the most common reason points to the shower drain weep holes. Your naked eye cannot see it, but there is actually a puddle of water trapped below the tile, and it has no where to go. To explain-if you have a tile floor in your shower, then you have a weep style drain. That means that any water that gets below the tile should migrate to the drain if the weep system is working properly. This is where we run into a problem. We find that about 90% of the weep drains are clogged when the builder hot mopped the shower with tar. This means that its possible that your shower has never drained properly. What also contributes to clogged weep drains is bar soap residue and hard water buildup adding to a mineral clog. To lookout for other signs of a clogged weep drain—-look at the floor of your shower. If you see cracks in your tile, or cracks in the grout line, or white minerals/calcium migrating up through the tile or grout, and lastly, wall damage on the outside of the shower curb. These are all signs of a weep drain problem.
