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Old 11-02-2010, 09:43 PM   #1
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Installing porcelin tile issue of clearnace and underlayment

Our floor joists are about 18 inches apart and the subfloor is about 3/4 inch. To install porcelin tile what is needed for cement board and does thinset need to be put down underneath the cement board too? We are also concerned if we will need to replace the metal doors as the tile flooring may not have clearance. Any solutions for that?

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Old 11-03-2010, 03:28 PM   #2
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Installing porcelin tile issue of clearnace and underlayment

Floor joists may be a typical 16" apart but could also be a typical 19.2" apart.

If they are 16" apart you should be fine. Add a tile-backer installed in thinset per tile-backer manufacturer's recommendations.

If they are 19.2" you might want to consider adding a layer of plywood before the tile-backer.

If door clearance is an issue, most doors (and their frames) can be easily raised enough to solve the issue. Sounds scary but not usually a major deal.

Any existing flooring should be removed first down to the original subfloor - doors should clear OK.

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