Floor Elf explains a weep hole, it’s purpose in a tile over tub situation, where to locate them, how to put them in. Readers leave over 200 comments at the time of this guest posting.
A weep hole is basically an open space which allows moisture that makes its way behind the tile a space from which to dissipate. This is the spot that moisture can run out. When moisture gets behind your tile it will always end up at the bottom of your wall (tile installation). When it gets there it needs some place to go – to get out from behind the tile and into the tub or shower basin. That’s what the weep hole is.