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Failing Tile

Posted by Chris on September 13th, 1998 10:51 AM
In reply to Local help by jack flash on September 7th, 1998 09:01 AM [Go to top of thread]

It is clear that whatever backer you have behind your tile
has failed. Is the home relatiely new? Some contractors
cut corners by using greenboard behind tile. After 3-5 years
the tiles fall off because the greenboard turns to
mush and disintegrates. If the home is quite old then there
is probably a mortar bed behind the tile (like my house). Mortar
beds fail after 30 years or so.

In either case, the entire tub surround needs to be removed and
rebuilt. Be sure to use a concrete-based backerboard as the base for your
tile. Hardi-backer would be the best choice, as it is totally
waterproof. Durock or Wonderboard will be "ok" second choices, though
they aren't fully waterproof. But at least water won't damage them.
Be sure to CAULK all joints in the corners and where the tile
meets the edge of the tub. Never grout these areas, as the grout will crack
due to movement and allow water inside your walls. That is one reason why
your tiles may be failing now.

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