3/4" ply for sheathing?

[spudley]

So a major retailer has closed most of their warehouse and is selling off used 3/4" 4x8 plywood used as shelves in pallet racking. I'm preparing for a garage build and was considering using this for sheathing. Aside from wrestling this heavy stuff around, anybody know of any downside to using 3/4" 5 ply rather than 1/2" OSB?
I looked it over and it's dusty but not warped, most pieces dead flat. Corners are fine.
The best part is the ply is $6 a sheet cheaper than 1/2" OSB at the local big box, but I will be doing the hauling. I'm even considering using it on the roof.
Thoughts?

 

[kbs2244]

I use it in a New York Min.

You can use it during construction as wind bracing at the corners as well.

Do not be afraid to talk price with the store manger.
("I will take it a for $**.00 a sheet")
That stuff has been written off the books and it is free money to him.

 

[Old Man Roger]

Used 3/4 on floors and roofs back in the 80's. Hardly ever see 3/4 plywood in the big box stores around here anymore.

If it's good for roofs, I cant think of a reason it wouldn't be good for a wall?

Make sure you got enough for the whole job, might have issues finding the exact same thickness.

 

[Cardboard Man]

Yeah, it's probably overkill but at that price, what's wrong with overkill? Your place will be built like a brick **** house (or at least a plywood **** house).

 

[6768rogues]

Check to see if it has labeling on it for code conformance. Some plywood is not labeled and if you have a picky building inspector he might not pass sheathing that is not labeled. Other than that, use it but plan for larger door and window jambs to accommodate it.

 

[rvieceli]

Make sure you negotiate and try for a lower price. Even a simple, I'm going to need X number of sheets, what can you do for me? They won't charge you more and a good chance they'll deal.

 

[nmk_61802]

The extra 1/4" will require custom jambs or extensions made. Most fabricated jambs are for 1/2" nominal sheeting and drywall with 2x4 or 6 between. Not really a big deal unless you are finishing the interior.

 

[Astross89]

I just got 40 sheets of osb for $3 a sheet. Buy what's cheap. I would use it.

 

[NUTTSGT]

It oughta make the walls more rigid but I hope you have some help installing it.

 

[ItsNemo]

The extra 1/4" will require custom jambs or extensions made. Most fabricated jambs are for 1/2" nominal sheeting and drywall with 2x4 or 6 between. Not really a big deal unless you are finishing the interior.

This is true...I would not enjoy having to deal with that gap everywhere. It's also silly heavy to lift compared to 1/2"...I swear 3/4" feels twice as heavy as 1/2" even though it shouldn't be.

Otherwise, I would use it...nothing wrong with building them stronger. Sure better than 7/16" osb that's code in a lot of places now.

 

[tarmy]

Make sure it hasn’t been exposed to water...may cause delamination...or inspection problems. Also, make sure they didn’t treat it with something to prevent bugs or rot...may have some (good) nasty chemicals on it. If it looks good, go for it. Makes adding stuff to the walls easier...

 

[climb.on]

Hell yes, I'd use it. I'd consider using it for the inside walls too.

 

[pcmeiners]

Buy it. As to roofing, it the only thickness/type of sheathing I use (23/32), 1/2" in NYC delaminates quickly due to generally moist condition.

 

[Jon_E]

I used 3/4" Advantech for a roof once. That was fun getting all those sheets up a ladder. I wouldn't hesitate to use it for exterior wall sheathing, but I would make sure that it was marked for exterior use. As others have said, you may have some issues with door and window jamb widths.

 

[strutaeng]

I see no problem. There's a place nearby that sells "utility" graded plywood for cheap, although I have never bought some. Honestly, even if it is not graded, I would jump on it.

Make sure you buy extra because 23/32 decking at the box stores is crazy expensive.

Also, perhaps use longer nails? I think I use 2 3/8 nails for 15/32, which should also work for 3/4 or 23/32 plywood.

 

[Milton Shaw]

Make sure it is exterior grade as you will have some moisture up there from condensation etc. Should be a lot better solid roof deck....

 

[Nor'Easter]

Why not use it on the interior for the first 8'...eliminates finding studs for anything to need to attach to walls.