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Old 09-21-2013, 07:32 AM   #16
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tile on an outdoor, covered porch (first post!)


Do not tile directly to the plywood. The wood will swell and contract with the seasons. You need a membrane to absorb these forces. Noble Deck is my preferred exterior membrane; Ditra next. Keep in mind some membrane manufacturers want a cement base (that rules out Hardi backer) under the membrane.

You also need a premium thinset. Laticrete Platinum or Kerabond+Keralastic liquid.

A porcelain tile rated for exterior use is a great choice.

Always plan on the worst case scenario when tiling outside. Why do it over?

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Old 09-21-2013, 08:11 AM   #17
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tile on an outdoor, covered porch (first post!)


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Originally Posted by olzo55 View Post
You also need a premium thinset. Laticrete Platinum or Kerabond+Keralastic liquid.
Keep in mind that these are modified thinsets, and are for use under Ditra but not above it. (Don't know about Noble.) Kerabond by itself would be used to set the tile.

Also, I'd personally use Ultraflex rather than mixing in the additive (Keralastic), but to each his own there.
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Old 09-21-2013, 11:44 AM   #18
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tile on an outdoor, covered porch (first post!)


Noble allows the modified thinset but requires 50% longer drying time before grouting.

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