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In some cases you might be subjected to hydrostatic water pressure. That is when the water source is higher than your floor, which causes the water to come up through the floor.

Ceramic and Porcelain TileConcrete Substrate SlabExpert AnswersfailuresgroutInteriorMoisture Problems
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According to the Marble Institute of America (MIA), on smooth surface stones, lippage should be limited to +/- 1/32″.

Expert AnswersgroutinstallationInteriorLippagestone
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I have been asked to look at couple of interior ceramic tile floors in Central Florida that have had flooding occurrences, then noticed loose, lifted and/or cracked tile (not just cracked grout joints). In the flooding cases, the thin-set is bonded partially to the tile and partially to the substrate as well as small areas of debonding at the tile. Are different types of tiles and mortars used in outdoor applications versus indoor? I am being pressed to explain why the tiles outside do not fail.

Ceramic and Porcelain TileExteriorInteriorMoisture ProblemsselectionWaterproofing
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Temperature – What are the effects of sudden ambient temperature and humidity changes (cold climate in winter) on interior ceramic tile?

Ceramic and Porcelain TileinstallationInterior
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Epoxy Grout – Is epoxy grout preferable to sanded or unsanded grout for ceramic tile and stone tile on the interior of homes. Please list the advantages and disadvantages.

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