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Old 01-17-2011, 06:48 PM   #31
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taping OSB sheathing joints


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Figures 27, 46, 57, 77, etc.,........ http://www.google.com/url?sa=t&sourc...DCcvwQ&cad=rja

Gary
Interesting story.

I don't think taping the OSB seams would have changed the outcome though.

The truth is, I don't believe that OSB, joint taping, or felt paper are the guilty parties.

A stucco application such as that requires 2 layers of felt, or any other WRB, IMO.

The stucco will bond to the outer layer of WRB, eliminating it's ability to drain. The stucco gets wet, stays damp and the moisture will be driven through the WRB in the wrong direction. The inner layer will act as the rain screen and allow moisture to drain away
. There were so many installation infractions in that homes exterior that I'm not aware of any structural sheathing product that would not have failed.

I will say that all the cracking in the stucco was probably due to swelling of the OSB, but you can't blame the OSB for that homes problems.

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Old 01-17-2011, 06:53 PM   #32
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taping OSB sheathing joints


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Yup, Tom and I try to act like we know what we're talking about
Yeah, you guys are OSB haters, but moisture is the route to all problems OSB.

Suppose you have a leaky pipe. All your furniture and personal belongings get ruined. Do you file a claim for water damage or pipe damage?

Water is the guilty party. Even if installation of the pipe was the real cause of the failure. Control the water, control the damage.
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Old 01-17-2011, 07:24 PM   #33
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taping OSB sheathing joints


I don't hate OSB at all. We use it on roof decks all the time.

I hate poor flashing details.
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Old 01-17-2011, 07:34 PM   #34
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i no hate osb either....Gary on the otherhand
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Old 01-17-2011, 08:01 PM   #35
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Really good stuff guys.

Older homes had more sq inches of holes than you could shake a stick at. Expensive to heat/cool but typically dry from the draft.

New construction closed the envelope. Add a temperature difference on the other side of the wall and you have a problem unless you design for it to vent (dry out).

I'm sure there are some builders out there that address this from the foundation to the attic, but I only see the horror stories.

OSB, great for roofing and garages.
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Old 01-17-2011, 08:21 PM   #36
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Lol, those pictures were in response to it turning to mush from the previous post. I dislike OSB on walls only, because it acts as a vapor barrier due to low permeability and waxed face, trapping moisture coming from the house. True, water control, outside and inside, is the key.
Tom, did you read my "biggest loser"? http://www.diychatroom.com/f98/how-b...ulation-90438/

I'm 1/2 done with one on OSB......

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Old 01-17-2011, 10:51 PM   #37
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i did now
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Old 01-18-2011, 06:02 AM   #38
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Figures 27, 46, 57, 77, etc.,........
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