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Old 12-17-2012, 10:04 PM   #1
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wood subfloor expansion/contraction


Plywood subfloors might expand/contract by a few millimeters with humidity levels (right?). Doesn't that pose a problem for portland cement-based products, e.g. floor levelers? Why don't the cement-based products crack when the wood expands or contracts?

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Old 12-18-2012, 05:54 PM   #2
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wood subfloor expansion/contraction


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Originally Posted by rogercaplan View Post
Why don't the cement-based products crack when the wood expands or contracts?
Who said it won't?

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Old 12-18-2012, 07:29 PM   #3
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wood subfloor expansion/contraction


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Originally Posted by Seattle2k View Post
Who said it won't?
I'm assuming it won't, based on the fact that there are many cement-based flooring products available that, according to the manufacturer, can be installed over plywood (and sometimes osb).
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Old 12-18-2012, 08:38 PM   #4
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wood subfloor expansion/contraction


It's likely to crack. What's more important is the type of finish flooring you'll be installing and the underlayment that goes on top of the cement leveller
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