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rogercaplan 12-17-2012 10:04 PM

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?

Seattle2k 12-18-2012 05:54 PM

Quote:

Originally Posted by rogercaplan (Post 1075016)
Why don't the cement-based products crack when the wood expands or contracts?

Who said it won't?

rogercaplan 12-18-2012 07:29 PM

Quote:

Originally Posted by Seattle2k (Post 1075531)
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).

Seattle2k 12-18-2012 08:38 PM

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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