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Old 01-29-2007, 07:07 PM   #1
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Question What is this?
I removed a 20sq ft section of oak hard wood floor today that buckled from water damage. Under the oak is what looks like mortar on top of OSB. This is in a townhouse condo on the second floor. What's the deal? According to the customer there was carpet before she had the wood put down. Why is there mortar/cement in the living room/ dining room area?

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Old 01-30-2007, 04:31 PM   #2
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Could be a self leveling compound to true up the subfloor before laying the hardwood. OK for minor deficiencies but not any structural problems
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Old 02-04-2007, 04:29 PM   #3
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Probably floor prep. From previous installation. carpet guys lay over everyhting they can get away with normally. Good luck..http://turnerflooring2.com
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Old 02-05-2007, 11:43 AM   #4
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How thick is it? Around here there are a lot of former apartment buildings turned into condos and most of them had a 1 1/2" lightweight concrete over OSB floor on the 2nd floor, it helps reduce noise and acted as sort of a fire barrier.
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Old 02-07-2007, 09:15 PM   #5
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Probably the self levelling compound.
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Old 02-07-2007, 10:47 PM   #6
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Sounds like gypcrete. As mentioned before, it is a sound barrier as well as a added fire rating. We are building apartments right now that use a 3/4'' layer on the second and third floors.

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We'll have to grab a longer board. I forgot to put the wood stretcher in the truck today.
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Old 02-07-2007, 11:10 PM   #7
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gypcrete
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Old 02-08-2007, 10:49 AM   #8
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Quote:
Originally Posted by Blackbird View Post
gypcrete
+3.
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