OSB subfloor problem

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Topic by JPB posted 08-20-2011 07:06 PM 3814 views 0 times favorited 4 replies Add to Favorites Watch
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3 posts in 3809 days

08-20-2011 07:06 PM

I’m putting down some hardwood floors in my home and the subfloor is OSB. The entry hall had old glued down parquet flooring in it that had to come up and the flooring is pulling part of the OSB up with it i- the top ‘layer’ I guess. Its 3/4” thick, so I’m not really worried about strength, but it doesn’t look like a very good surface for nail down hardwoods. Is there anything I can do to smooth it out rather than replace the sub floor? Fixall? Floor leveling compound?



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139 posts in 3893 days

08-20-2011 09:45 PM

I wouldn’t think OSB would be very good for sub flooring. The plywood assoc. says it is stronger than plywood but I would think it would chip out worse and be difficult to work with. there are floor leveling compounds that you pour on the floor and it seeks its own level to make things easier. It isn’t cheap but then again you are going to lay an expensive floor so lets do it right. My question is this: will the floor level compound set like concrete and not allow you to easily nail through it without breaking it? there are other kinds of floor leveler too. I don’t have enough experience to really answer this for you but I have plently of questions I guess. I will follow this thread and am interested in what you find. Do it right is all I would offer.

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3 posts in 3809 days

08-21-2011 03:45 PM

Yeah, OSB does not seem like the ideal subfloor to me either, but its what the builder used. I was thinking about this http://www.custombuildingproducts.com/ProductCatalog/SurfacePrep/repair/fixitall.aspx and putting down something similar to a skim coat that you would put on walls, but am not sure I can nail through it without shattering it.

View dfletcher's profile


128 posts in 4398 days

08-22-2011 03:39 AM

Have you thought about just gluing some laminate on top, to level it out and create a smooth subfloor? It works pretty well and easy to nail into.

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3 posts in 3809 days

08-22-2011 05:24 AM

I did think about doing that, but the floor transitions into the living and dining rooms on the left and right and laminate would make the transitions uneven. I was hoping not to have to put down 2 floors.

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