Concrete- How smooth?

Old 05-13-08, 11:34 AM
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Concrete- How smooth?

Hi everyone-
I'm going to be installing laminate flooring over a concrete subfloor. I checked the moisture content and have no problems there.

My main question is, how smooth does the concrete have to be? By smoothness, I mean texture. Right now, the concrete has very small bumps all throughout. Does this need to be smoothed down?

Any advice on how smooth the floor needs to be is appreciated. Pics would be great too.

Old 05-13-08, 12:00 PM
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Flatness is the major concern. No high spots. No low spots. If necessary, grind high spots. Fill low spots with cement-based self-leveling compound.

How to check for flatness?

Photo Credit: Hardwoodflooringtalk

Read instructive article and view more pictures here:
Old 05-29-08, 05:15 PM
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Dang!!! That is my picture!!!

That is a gluedown over concrete, I was doing. The same picture is up in the STICKY post above. Concrete Prep.

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