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Plywood vs OSB

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Nepean GC

Ā· Tall Moose
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Discussion starter · #1 · (Edited)
Lets start a war šŸ¤£

Working on my house for a change, so I'm really only looking at material cost here. The extra labour isn't really a concern.

For a new subfloor, in a reno situation - 3/4 Plywood or double layer 5/8" commodity OSB? Price is equal. I've called every supplier around, and no one can/will get me 3/4 Advantech, so that rules that out.

For a bit of perspective, floor framing is 12" OC, and finish will be hardwood in most of the area and tile in a bathroom.

Spending your own money, on your own house, what would you do? I'm torn.
 
#2 ·
double osb . osb i guess is fine at least from what i read on the building science info . i know 3/4 ply can be spongie at times so the double 5/8 sounds much more stable .
more work then one layer of 1 1/8 T&G . just my 1st thought on it . i like the idea of the double layer .
 
#6 ·
Definitely plywood. I would consider Advantech OSB out of reputation but i have never used it and it appears to not be available for you. I have never felt a spongy 3/4" T&G plywood floor even on 16" spacing. I did have to replace a lot of OSB subfloor that was under tile above a basement that had pretty much started to disintegrate though.
 
#12 ·
Advantech, the framers choice!

Truflor is good too. No sledge required man!

It'd be a toss up between one of those 2 brands and 3/4 ply. I've seen so much 3/4 ply delaminate. I suppose if I knew it would never get wet I'd be going with the ply.

Sent from my Pixel 4a using Tapatalk
 
#15 ·
1 1/8 plywood ugggg.... I'm tired just thinking about carrying it. Your over thinking it, just use 3/4 ply glue and screw. I would only consider double 5/8 if I could get T&G.

Have you called around to different lumber yard to try and find advantec? It really is a great product and holds up very well to water.
 
#17 ·
Plywood here, for clients too.

I would never use osb for sub floor. People do.

I used advantech once it went over 3/4 ply. That made a heavy floor. Advantech seemed like good stuff, especially if you can't get a good plywood.

Double 5/8 is common or 3/4 cdx with a good 5/8" underlayment on top.

You can do single 3/4 ply and run 3/4 oak strip floor perpendicular to the joists. If you run parallel you should double up the sub floor.
 
Discussion starter · #18 ·
Technically I can get Advantech, just only in 5/8, from a supplier an hour and a half away. Everyone I talked to said special order, minimum full lift quantity, and at least 2-3 week lead time...That was the answer from every major, and a crapload of small suppliers here, including a couple that stocks Huber Zip and Zip R. And I'm not talking HD or Lowes. These are professional suppliers we've had accounts with for over a decade. Not worth it for only 800sq ft.

I'm leaning towards 3/4 T&G ply. I've never been a fan of OSB, but I will admit I was intrigued by the value proposition of double 5/8 osb for the same money. Unless the roof flys off, this floor will never see water.

Not planning on moving any time soon...but then again, I said that 6 years ago when I bought my last place. Maybe I need a hobby other than working šŸ˜‚
 
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hdavis
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