Quote:
Originally Posted by tiger_handheld
so we figured out the water was leaking from the tile grout in the shower.
how does tile grout decay? We use bleach to clean the washrooms real good once a month, would that have an effect?
shitty deal is, now there is a hole in the ceiling and its not from the pipes =\.
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Grout should not decay. It would usually result from poor installtion / application of grout / tiles.
Grout too wet or dry when first applied can be too porous or weak, or there is not enough grout pushed in to the crack to form a good bond. Or the backerboard has too much movement, causing the grout to crack.
Seams between walls and different surfaces should be sealed with silicone/caulk that remains flexible. For example, some installers use only grout for a inside corner with tiles on both sides, and if the wall flexes, the grout will crack.
Also to watch out for is if water has penetrated between the grout, the backerboard may be damaged (years ago, drywall was used as backerboard). If you push on a tile, does it seem loose or does the wall give? Water also leads to mold growth ...