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BV002802

12:24AM | 12/16/13
Bvflooring
I have tiles in my kitchen and bathrooms. The grout keeps coming out even after we re-grouted. What's the reason and solution

BV002712

01:59PM | 12/21/13
I had this problem in another house. The grout is coming out probably because the underlying floor has movement when walked on or there is movement caused by expansion/contraction. This puts stress on the tiles and the grout cracks and comes out. The tiles should have been placed on a metal grid which is it itself attached to the sub floor. The metal grid "absorbs" the movement. If that was not done, the only long term solution will be to replace the tiles but using the metal grid method. Some contractors don't think that this is necessary thinking the subfloor has enough stability.

jcaption

09:52AM | 01/15/14
Member Since: 01/14/14
85 lifetime posts
Not so sure a "metal grid" is the way to go.
That was an old method done many years ago. It's called a mud job.
There was no tile board, or membranes long ago that we use now.
I do agree the subfloor or floor joist is the real issue.
People think you can just lay tile over anything.
Underside, over spanned joist.
Subfloor and underlayment needed to be about 1-1/4 thick.
No particle board, MDF, 1/4 plywood, linoleum under the tiles.
If tile board was used under the tiles it needed thin set under it.
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