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Rochester, New York
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Louisville, KY
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Rochester, New York
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 OSB= "Oriented" strand board
[#3] Posted: 12/18/2011 - 04:48:44 AM |  |  |
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Yes, floor. Roughly 40 sheets installed on the wrong axis and upside down.
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Chad Fabry
StructureSmart Home Inspection Rochester, NY
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Lafayette, Louisiana
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OSB= "Oriented" strand board
[#4] Posted: 12/18/2011 - 04:51:39 AM | | |
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'This side down' applies for roof deck applications only to take advantage of the slip resistant qualities of the other side, as far as I know.
Marc
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"If Guam gets too overpopulated, it might tip over."
Congressman Hank Johnson (D) GA |
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Kenmore, WA
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OSB= "Oriented" strand board
[#5] Posted: 12/18/2011 - 05:58:55 AM | | |
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This was a construction phase inspection as part of your code official gig, yes?
If so, I'd be curious as to what would be the acceptable correction.
It seems the upside-down thing is forgivable. But the wrong axis. . . .Would blocking at each panel edge be sufficient?
In other words, the violation is the same whether from a home inspector or AHJ. Big difference is the AHJ would require the correction not just suggest it.
So, what would be acceptable? And is there ever a situation over your head with which you're never comfortable signing off?
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Randy Navarro
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Victoria, British Columbia
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OSB= "Oriented" strand board
[#6] Posted: 12/18/2011 - 08:38:40 AM | | |
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Put it this way. If they got that wrong, what else have they done? As a buyer, I would ask for a new subfloor, preferably plywood.
With regards to the grade stamp, laying the sheathing on a roof with the stamp down leaves it visible in the attic. I thought that was the reasoning behind it.
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Gaston, Oregon
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OSB= "Oriented" strand board
[#7] Posted: 12/18/2011 - 09:03:09 AM | | |
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The upside down thing is no big deal. As Marc pointed out, it's only critical on a roof, where the slip resistant side should go up.
Were they planning to install underlayment? If so, they could install underlayment-grade plywood and orient it in the correct direction.
If they weren't planning on underlayment, maybe they should.
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Jim Katen, Oregon
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Lafayette, Louisiana
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OSB= "Oriented" strand board
[#8] Posted: 12/18/2011 - 09:07:08 AM | | |
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You meant 3/4 underlayment, did you? Underlayment here is 1/4 or 3/16 AC ply.
What about under the sills of walls that are parallel to the joists?
Marc
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"If Guam gets too overpopulated, it might tip over."
Congressman Hank Johnson (D) GA |
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Gaston, Oregon
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Newberg, OR
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Gaston, Oregon
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OSB= "Oriented" strand board
[#11] Posted: 12/18/2011 - 4:02:51 PM | | |
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Quote: Originally posted by Brandon WhitmoreHere's a good article regarding this defect....... Download Attachment:  WoesteNielsenFeb2010.pdf204.9?KB
Yes, I suppose that if there were going to be tile installed on this floor, they should really repair it.
Another option, for a tiled area, by the way, is to rip 3/4 ply across the face grain into 14" wide strips and glue & screw them to the underside of the OSB between the joists. It makes for a very stiff floor.
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Jim Katen, Oregon
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Collins, NY
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OSB= "Oriented" strand board
[#12] Posted: 12/19/2011 - 05:55:26 AM | | |
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I'd wager the 'upside down' thing was intentional. The builder wants you looking down and shaking your head so you don't see what he screwed up in the roof framing.
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Tom
http://clearcreekhomeinspection.com/
Life is tough enough as it is, it's tougher when your stupid. Don't do stupid things.
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Comer, GA
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OSB= "Oriented" strand board
[#13] Posted: 12/19/2011 - 06:25:01 AM | | |
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Randy,
I have served as an AHJ for three different fiefdoms, and most times I have issued corrections have been asked how to fixit. When I answer that it is not my problem there is lots of confusion. Builder/contractors seem to think if an inspector finds something not compliant, it is up to him to direct the correction. They do not grasp the idea of responsibility.
Wrong.
My stock reply is that if you don't know how to fixit you should hire someone to help you. Why? Because noncompliance usually has a host of remedies, and I am not a designer. Which remedy is best is a topic for discussion.
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Lafayette, Louisiana
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Comer, GA
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OSB= "Oriented" strand board
[#15] Posted: 12/20/2011 - 06:31:22 AM | | |
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Mark,
In this little county, whose highest aspiration since the decline of Big Cotton is to be a viable bedroom community for a highly urbanized adjacent one, there have been two or three kinds of builder/developers. The local good ole boys, the corporate ones, and the owner builders. 95+% of the building for two decades has been residential.
The good ole boys have the resources to buy the land and finance the houses, but never really learned how to build. The corporate ones have tended to hire young and inexperienced field supervisors, and the owner/builders are mostly amateurs.
When faced with corrections none of them have a clue, and see the inspector as the problem. They say, "What do I have to do to make you happy?"
The corporate ones buy plans from designers, but the plans are off the shelf. None of the lot can even look up design help in the phone book.
At the county P&Z office I generated lots of complaints for writing corrections. A couple of other inspectors could barely read and write, much less look up anything in a codebook, and tended to just breeze through the jobs without a clue as to what they were seeing.
When the crash came my part time position was cut to save the county money.
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| "Emancipate yourself from mental slavery, for only ourselves can free our minds"-Bob Marley |
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Chicago, IL
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OSB= "Oriented" strand board
[#16] Posted: 12/20/2011 - 07:16:05 AM | | |
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Just so I'm clear on this.......
Other than displaying stupidity, what's the downside? Is there one?
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Kurt in Chicago
"If I smell it, it goes in the report".............Phillip Smith...2012
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Comer, GA
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OSB= "Oriented" strand board
[#17] Posted: 12/20/2011 - 07:33:42 AM | | |
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"...Now everything's a little upside down, as a matter of fact the wheels have stopped
What's good is bad what's bad is good you'll find out when you reach the top
You're on the bottom..." B. Dylan
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Rochester, New York
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Chicago, IL
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OSB= "Oriented" strand board
[#19] Posted: 12/20/2011 - 09:19:39 AM | | |
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Yes, the axis part I understand, and agree. I wouldn't be recommending much of anything other than have an engineer bless it, or not, and if not, come up with a solution.
It would also tip me off to be looking for all sorts of other stuff.
This is just for my understanding of OSB performance. One side's the same as the other, right?
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Kurt in Chicago
"If I smell it, it goes in the report".............Phillip Smith...2012
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Rochester, New York
Posts: 4113
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OSB= "Oriented" strand board
[#20] Posted: 12/21/2011 - 05:24:10 AM | | |
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This is just for my understanding of OSB performance. One side's the same as the other, right?
According to Melissa @ GP, there is no structural difference. She did not know why sub-floor has a grade stamp that says "this side down" and she did not know why 7/16 has one sanded side as the sanding adds to production costs.
I know from contacts in manufacturing facilities that printing anything on anything is expensive. I was told by an Owens Corning Rep that OC realized a savings of a half million dollars per year per plant by dropping the "R" and printing only the "19" on unfaced product. Further savings were effected by printing the "19" using spaced dots rather than solid lines. That considered, I suspect that there is some material difference or up / down info would be eliminated and just a grade stamp used. The last OSB I bought was from ARBC, a Canadian company and there was just a grade stamp and no direction on up or down. Weyerhauser though directs one to install their product "this side down"
My anecdotal experience with OSB is that the sanded side when wetted suffers more than the unsanded side. Even when I paint OSB, the rough side takes the paint and the sanded side de-laminates a bit.
I'm waiting on responses from other manufacturers.
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Chad Fabry
StructureSmart Home Inspection Rochester, NY
www.structuresmart.com
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