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Hollow Sounding Tiles

Any type of tile or substrate that becomes hollow sounding.

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First of all, hollow sounding tiles is not considered a defect. There are no standards addressing hollow sounds, other to say that hollow sounds don’t necessary mean it is a problem.

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First of all not all hollow sounds are voids. Having hollow sounds is not a deficiency and there are no standards addressing hollow sounds, other to say that hollow sounds don’t necessary mean it is a problem.

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Hollow sounding tile is not considered a defect. It can be an indication that there are voids under tiles or that the tile or the underlying components are not bonded for one reason or another.

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Expansion joints, which is a type of movement joint, may or may be required in a tile installation. But always there should be some type of a movement joint installed in all tile applications per industry standards.

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If the tile was installed correctly, it should not be damaged by being submerged in water. Although quite often tiles are not installed correctly, and there can be resultant damages from a flood.

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There is no standard for whether a tile should sound hollow or not, or do what degree. A hollow sound can mean the tile, or a portion of the tile, is not bonded or there is a void under that portion of the tile. Or the hollow sound may be a characteristic of that particular tile assembly.

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Peel & Stick Crack Isolation membranes can cause the tiles to sound different than if they were installed directly over a concrete slab.

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I just read your article on “hollow” sounding tiles. I just had about 1700 sq ft of 24” x 24” porcelain tiles installed over a post-tension slab foundation. The tiles were installed in a diagonal pattern. The house is 12 years old. When I step or tap on some of the tiles with a letter soled shoe, I get a high pitched sound on some of the tiles

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