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Old 2014-04-08, 04:12 PM
WellThatsLovely WellThatsLovely is offline
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Default OSB vs Plywood

Does anyone have a preference?

We've been thinking about asking to upgrade to plywood... any thoughts?

We'll be in this house (hopefully) forever, so wondering if OSB is good enough?
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Old 2014-04-08, 05:28 PM
R_D_G R_D_G is offline
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I paid for the plywood upgrade. OSB might be OK but I went with the material that has been in use longer. I just didn't think that pieces of wood glued together in that way was as good. Again, I could be wrong.

RDG
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Old 2014-04-08, 06:50 PM
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Quote:
Originally Posted by WellThatsLovely View Post

We'll be in this house (hopefully) forever, so wondering if OSB is good enough?
If thats the case, then upgrade to plywood.
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Old 2014-04-08, 09:45 PM
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GregS GregS is offline
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Quote:
Originally Posted by R_D_G View Post
I just didn't think that pieces of wood glued together in that way was as good.
How do you think plywood is made?

Tree trunk is milled to 1/8", flattened out and glued to other flattened out pieces.

Difference is it's one big flat piece of wood instead of a bunch of smaller wood chips.

Structurally OSB is shown to be stronger in many cases. However the drawback is the edges can swell greater than plywood if they get wet.

Solution is to seal the edges and use tongue-in-groove fittings on either side. They you just have to worry about the cut edges, which would most likely be up against an outside wall and not as much of an issue.

Information based on the book Renovation 3rd Edition, which I highly recommend getting if you want to be handy around your home.
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Old 2014-04-09, 08:01 AM
R_D_G R_D_G is offline
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Thanks Greg. Then how do they justify charging more for plywood? Is it simply because it is more expensive to make?...but no real value, just like air conditioners in the arctic...or water softeners in Stouffville? ;-)

RDG

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Old 2014-04-09, 08:21 AM
PJD PJD is offline
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After I bought my house and well before it was built I was already shopping for hardwood. I wanted to look at all my options before I would be required to chose my upgrades, and also because I knew I would install my hardwood floors after closing but I had to tell the builder which colour I wanted my stairs in so they would match. I went to many different stores and spoke to many installers and they always told me they weren't fond of OSB. If given a choice they would upgrade to plywood. Some didn't like stapling into OSB and used glue. One theme was common, everyone said plywood was a better quality subfloor so I upgraded. It depends how much they're charging you and if it's important to you.
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Old 2014-04-10, 10:25 PM
Mark & Lynda Mark & Lynda is offline
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Quote:
Originally Posted by PJD View Post
One theme was common, everyone said plywood was a better quality subfloor
I believe that was more than likely their uninformed opinion. My flooring installer stated OSB would not be an issue when we were inquiring, and it hasn't 7 years later either.

As Greg pointed out, it's been shown OSB in some cases is stronger than plywood. ie. knots in plywood are a week point. OSB does not contain knots.

Just think, at one time plywood had the same prejudice when it was introduced into the marketplace.
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Old 2014-04-10, 11:52 PM
BartBandy BartBandy is offline
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Knots in plywood don't matter because they're limited to one layer.

We paid the ransom and went with plywood. It's not necessary, but I like working with plywood more, and we plan to be here a while.
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Old 2014-04-11, 12:04 PM
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gerapau gerapau is offline
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I assume when you upgrade it is just for for the floors? Exterior walls, roof sheathing, even your engineered floor joists (if you have them) will still be OSB?
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Old 2014-04-11, 06:37 PM
R_D_G R_D_G is offline
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Quote:
Originally Posted by gerapau View Post
I assume when you upgrade it is just for for the floors? Exterior walls, roof sheathing, even your engineered floor joists (if you have them) will still be OSB?


In my case:
1) the joists were 2x 10 dimensional lumber
2) plywood roof sheathing was already standard.
3) I had that pink foamular exterior sheathing behind the bricks and no osb or plywood.

RDG
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