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Subfloor prep before laminate

Posted by freemanbrian12 (My Page) on
Sat, Oct 19, 13 at 14:19

I plan to lay a tongue and groove floating laminate floor in my living room. After I pulled up the carpet I found the sub floor is particle board and isn't perfectly flat. It is higher at all seams and lower in the center of the panels. I would say the biggest gaps are about 3/16" across my 4' level.

I tried sanding at the seams but it didn't help much without taking quite a bit of material off.

Is a leveling compound an option or is replacing the sub floor with plywood my only hope?

Thank you,

Follow-Up Postings:

RE: Subfloor prep before laminate

You need to lift the subflooring and find and fix whatever is causing the seams to be high and the centers to be lower.

Adding "blocking" may be what is needed: cross connections between joists for extra support.

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