What they said to me is, with the new seismic codes coming in, it's no longer code compliant for the roof. The walls are still fine. Also, they could be installation issues as well. Most people don't know there is an aarow showing the direction of strength on the sheet for install.
OSB vs. ply roof
- Thread starter gball
- Start date
What they said to me is, with the new seismic codes coming in, it's no longer code compliant for the roof. The walls are still fine. Also, they could be installation issues as well. Most people don't know there is an aarow showing the direction of strength on the sheet for install.
mmhouse
Well-known member
Here is a paper by the Engineered Wood Products Association explaining the weaknesses of OSB - typically as a result of installation problems. The fact is that OSB is typically less forgiving of careless installation than plywood - and careless installation is, unfortunately, not all that uncommon.
http://www.ewpa.com/Archive/2006/aug/Paper_266.pdf
http://www.ewpa.com/Archive/2006/aug/Paper_266.pdf
Holy ****! Did you see the shear reduction for over driven fasteners??? All the coil guns i've ever used always over drive by at least 1/8 inch! When the compressor is full, a 1/4 is the norm. And that's at 120 PSI.
Last edited:
caddyman72
Member
- Joined
- Jan 19, 2011
- Messages
- 17
5/8 five ply here. I cant believe someone would actually use 7/16 osb on a roof.
spotco2
Well-known member
KCarGuy
Well-known member
Putting Strength and Cost aside...I Personally use Plywood on everything during my own Builds or repairs.
I dont like OSB, never did.
It Breaks easier than Plywood.
I can rip it off of a Roof and leave the nails behind with a good tug.
I look at OSB, like i look at Particle Board Furniture....Ugh!
I understand to widespread use of it...Lower cost for Contractors and Manufacturers looking to get every ounce of wood out of a Tree...even the Shavings.
But...For Me...On my own House or Garage, Or even a Shed...Its Plywood all the way.
I dont like OSB, never did.
It Breaks easier than Plywood.
I can rip it off of a Roof and leave the nails behind with a good tug.
I look at OSB, like i look at Particle Board Furniture....Ugh!
I understand to widespread use of it...Lower cost for Contractors and Manufacturers looking to get every ounce of wood out of a Tree...even the Shavings.
But...For Me...On my own House or Garage, Or even a Shed...Its Plywood all the way.
That's only if your nailer doesn't have a depth of drive setting. Most of mine do, those that don't have had the drive pin ground off to reduce the depth.
There are studies to prove each side, you just have to look for each one. Honestly, I really don't care what people use as this could be the next biggest debate compared to airlines and wall coverings.. . . . tastes great, less filling.
http://www.rci-online.org/interface/2003-06-haughton-murphy.pdf
This conclusion should not be construed as a blanket condemnation of the use of OSB structural sheathing in roof, wall, or
floor assemblies, even in the wettest and most humid climates.
OSB is a well-engineered product that provides significant economic, structural, and environmental (through the use of lower
quality and more easily farmed trees) benefits. For many uses,
OSB provides performance and/or service values that are superior
to plywood; however, for other uses the opposite may be true, particularly during extended conditions of excessive moisture.
Industry groups correctly note that, “When properly installed,
neither OSB nor plywood should be exposed to those extreme conditions...”; however, they are incorrect when they conclude this
assertion by stating, “...and both have performed equally well.