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Osb Vs Plywood In Shearwalls

 
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Old 12-17-2018, 08:47 PM   #21
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Re: Osb Vs Plywood In Shearwalls


Quote:
Originally Posted by Dirtywhiteboy View Post
advantech is very strong stuff. It has something in it to repel water too. We use it for the whole house.
I've wondered if that also repels thinset when putting down underlayment for tile.
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Old 12-17-2018, 08:54 PM   #22
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Re: Osb Vs Plywood In Shearwalls


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Originally Posted by Golden view View Post
I've wondered if that also repels thinset when putting down underlayment for tile.
I doubt it, thinset is sticky ****. Plus the thinset isnít supposed to hold the underlayment, the fasteners are. Thinset is just to fill voids.
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Old 12-17-2018, 08:56 PM   #23
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Re: Osb Vs Plywood In Shearwalls


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I doubt it, thinset is sticky ****. Plus the thinset isnít supposed to hold the underlayment, the fasteners are. Thinset is just to fill voids.
True, unless the underlayment is ditra or similar.
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Old 12-17-2018, 09:00 PM   #24
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Re: Osb Vs Plywood In Shearwalls


Thinset over Advantech is good for filling voids, but I don't know of anyone who will warrant tile on thinset on Advantech.
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Old 12-17-2018, 09:18 PM   #25
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Re: Osb Vs Plywood In Shearwalls


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Originally Posted by Tinstaafl View Post
Thinset over Advantech is good for filling voids, but I don't know of anyone who will warrant tile on thinset on Advantech.
Schluter warranties installation over OSB.
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Old 12-17-2018, 10:11 PM   #26
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Re: Osb Vs Plywood In Shearwalls


Quote:
Originally Posted by Dirtywhiteboy View Post
advantech is very strong stuff. It has something in it to repel water too. We use it for the whole house.
3/4" AdvanTech subfloor is a whole "nother thing from 7/16" OSB on a shear wall or roof assembly.
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Old 12-17-2018, 10:31 PM   #27
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Re: Osb Vs Plywood In Shearwalls


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Originally Posted by Golden view View Post
Schluter warranties installation over OSB.
Advantech isn't just OSB. Ask them. I did, and the answer was no.
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Old 12-17-2018, 11:09 PM   #28
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Re: Osb Vs Plywood In Shearwalls


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Originally Posted by Tinstaafl View Post
Advantech isn't just OSB. Ask them. I did, and the answer was no.
It is oriented strand board. The best, but still just OSB. I hate marketing BS.
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Old 12-17-2018, 11:21 PM   #29
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Re: Osb Vs Plywood In Shearwalls


I have no issues with OSB struct 1 for shearwalls. I can't tell you the last time we used plywood. And we're here in siesmic country.


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Old 12-17-2018, 11:22 PM   #30
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Re: Osb Vs Plywood In Shearwalls


Back to shear.

If it's an engineered design, they would have to design using the specific product properties. This may result in a preference one way or the other when specifying the sheathing. Just speculation on my part.

I don't think prescriptive code cares one way or the other, as ling as it's rated for the application.
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Old 12-18-2018, 12:11 AM   #31
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Re: Osb Vs Plywood In Shearwalls


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Originally Posted by Californiadecks View Post
I have no issues with OSB struct 1 for shearwalls. I can't tell you the last time we used plywood. And we're here in siesmic country.


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i will look into what structual 1 is .
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Old 12-18-2018, 12:16 AM   #32
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Re: Osb Vs Plywood In Shearwalls


It's called out on our shear and nailing schedule.


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Old 12-18-2018, 01:40 AM   #33
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Re: Osb Vs Plywood In Shearwalls


Well, ever since the seminar by the mold expert I regained being leery about OSB. He said he's seen so many problems with it if it gets wet, said plywood will recover oftentimes but you can be really screwed with OSB.

Regarding Structural 1 I think it's actually Structural I. The reason I do is because on the APA books and tables it shows it as an I and not a 1. This is a minor point but it has come up. In that good presentation up the thread it's called Structural 1 and I've had discussions with plan checkers on it but since that's how it's called by the APA that's how we're calling it.
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Old 12-18-2018, 10:29 AM   #34
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Re: Osb Vs Plywood In Shearwalls


Quote:
Originally Posted by Rio View Post
Well, ever since the seminar by the mold expert I regained being leery about OSB. He said he's seen so many problems with it if it gets wet, said plywood will recover oftentimes but you can be really screwed with OSB.



Regarding Structural 1 I think it's actually Structural I. The reason I do is because on the APA books and tables it shows it as an I and not a 1. This is a minor point but it has come up. In that good presentation up the thread it's called Structural 1 and I've had discussions with plan checkers on it but since that's how it's called by the APA that's how we're calling it.


Says right on the OSB a number 1. Iirc


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Old 12-18-2018, 11:29 AM   #35
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Re: Osb Vs Plywood In Shearwalls


Quote:
Originally Posted by Californiadecks View Post
Says right on the OSB a number 1. Iirc


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Thanks, it's confusing because there seems to be a conflict in the nomenclature. Here's another excerpt from the APA on the subject.
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File Type: pdf APA Structrual I excerpt.pdf (20.0 KB, 27 views)
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Old 12-18-2018, 02:35 PM   #36
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Re: Osb Vs Plywood In Shearwalls


"Advant" tech type OSB in my experience lasts as long as exterior glued plywood, if not longer.

See JLC article on Tight Air home that had to have the OSB painted to close the pores in the sheathing to pass the air door tests.....

The builders had to "Unside" the home, Paint all exposed sheathing... reassemble.

If your are looking to add some decades of trouble free home living, paint/seal, All the framing and sheathing elements to resist short term moisture events that total normally wood frame homes.

The smart $ Uses Masonry in potentially Wet and damp locations, and I heard it is really popular in the burnt areas of California.

I think there might be just a little Conflation Of seismic damping through destruction of hundreds of fasteners and sheathing connections vs. getting enough connections to achieve 100% loading of the shear panel for wind & other loads.
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Old 12-18-2018, 03:53 PM   #37
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Re: Osb Vs Plywood In Shearwalls


Quote:
Originally Posted by Rio View Post
Regarding Structural 1 I think it's actually Structural I.
Roman numeral I = #1 maybe?
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Old 12-18-2018, 04:26 PM   #38
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Re: Osb Vs Plywood In Shearwalls


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Roman numeral I = #1 maybe?
The 2nd link I posted explains it, it's definitely supposed to be Structural I, at least according to the APA.

The #1 might be the exposure rating but I also think that the I looks a lot like 1 so it's been assumed that it is supposed to be Structural 1. I checked it out originally when a plan checker was ragging on us about it.

Last edited by Rio; 12-18-2018 at 04:30 PM.
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Old 12-19-2018, 02:20 AM   #39
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Re: Osb Vs Plywood In Shearwalls


When referring to World War 1 is it WWI or WW1? WWII or WW2? They are both correct, but typically written with an "I".

Roman numerals: I V X Come on sports junkies, what Super Bowl is it?
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Old 12-19-2018, 07:06 PM   #40
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Re: Osb Vs Plywood In Shearwalls


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When referring to World War 1 is it WWI or WW1? WWII or WW2? They are both correct, but typically written with an "I".

Roman numerals: I V X Come on sports junkies, what Super Bowl is it?
Superbowl II

As in this is the second Superbowl I won't watch...

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