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plywood shims?

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cookson, ok
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[#1] Posted: 04/17/2012 - 2:18:35 PM
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crawlspace with intermediate columns. Plywood is used as shims. The plywood extends out past all points of contact with the joists. That is correct, no beams. All joists that are run from the foundation walls to the columns and intersected with hangers where at right angels to each other. Can plywood be an acceptable shim for the joist to rest on at the top of the columns? There is no metal between the concrete columns and the wood shims...I know....

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cookson, ok
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plywood shims?
[#2] Posted: 04/17/2012 - 2:22:15 PM
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I ask cause this is the result. A crushed plywood shim. I believe because of waaayyy toooo much moisture under the home. foundation vents are closed. Hvac ducts insulation has been chewed off by pets, dryer vent uninsulated in the crawlspace, etc...

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cookson, ok
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plywood shims?
[#3] Posted: 04/17/2012 - 2:28:55 PM
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and the crushed shim, that dropped about 1/4 to 1/2 inch resulted in a horizontal crack upstairs between two door frames. The floor has a slope to it for about 2 feet towards this wall.

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Gaston, Oregon
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plywood shims?
[#4] Posted: 04/17/2012 - 11:49:47 PM
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The problem in your pictures has nothing to do with the fact that the shim is plywood. That's the least of the concerns.
Jim Katen, Oregon
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plywood shims?
[#5] Posted: 04/30/2012 - 11:10:38 AM
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What are the other concerns?
Denny Waters
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plywood shims?
[#6] Posted: 04/30/2012 - 6:21:58 PM
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Quote: What are the other concerns?


#1- moisture/ humidity

Brandon

Portland Home Inspector
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plywood shims?
[#7] Posted: 04/30/2012 - 6:50:36 PM
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Hmm. Is that a puddle I'm seeing back underneath that ducting? My last inspection had that going on along with the LP siding action. Mine had all the joist bays filled tight with insulation. There was probably this going on too.
Denny Waters
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plywood shims?
[#8] Posted: 05/01/2012 - 12:46:50 AM
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Quote: Originally posted by Denray

What are the other concerns?


Moisture
No vapor barrier (moisture)
Decay (the result of moisture, and no vapor barrier)
Undersized header
Poorly supported header
Poorly installed joist hangers
Crummy ducts
Crummy wiring
No insulation

Kimball noted most of it. It's just odd that he seemed to focus on the plywood, which really isn't much of a problem in itself.

Jim Katen, Oregon
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