Subfloor waterproofing

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  #1  
Old 07-10-00, 04:00 PM
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I am replacing carpet in an entry way and dining area with slate tile. The subfloor is 3/4" plywood on waferboard I-beams 16" OC. The entry may see occasional water from tracked in rain/snow. Is it necessary to put a waterproofing (resistant) sealer down befor the Wonderboard.
 
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Old 07-10-00, 08:46 PM
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I see no reason to put down a waterproofing material before the wonderboard. I normally do not. Thinset goes on the subfloor before the cement board and this could interfere with the thinset bonding to the subfloor. Someone else might have other thoughts.
 
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Old 07-10-00, 09:26 PM
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Thank you, I always appreciate your insight.
 
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