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Structural Inspections Contains discussions about the structural portion of a home inspection. This includes foundations, framing, etc.

 
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  #1  
Old 6/18/09, 7:11 PM
Rob London Rob London is offline
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Default PWF - what type of wood is used?

Can PWFs use the same wood as the kind used in decks, or do they us a wood that is specially treated just for PWFs?
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  #2  
Old 6/18/09, 8:28 PM
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Default Re: PWF - what type of wood is used?

Pressure treated plywood




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Old 6/18/09, 10:14 PM
Jeffery L. Haynes Jeffery L. Haynes is offline
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Default Re: PWF - what type of wood is used?

Southern Pine is the preferred species for PWF's.
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  #4  
Old 6/19/09, 12:17 AM
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Default Re: PWF - what type of wood is used?

Ok already.
What is a PWF?

Preserved Wood Foundation ?
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  #5  
Old 6/19/09, 1:17 AM
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Default Re: PWF - what type of wood is used?

Quote:
Originally Posted by jhaynes View Post
Southern Pine is the preferred species for PWF's.
Plywood made from Southern Pine? It is the plywood that forms the main barrier against decay, right?




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  #6  
Old 6/19/09, 1:20 AM
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Default Re: PWF - what type of wood is used?

Quote:
Originally Posted by relliott View Post
Ok already.
What is a PWF?

Preserved Wood Foundation ?
Stands for "Powdered Wood Foundation" Bob.

OK, sorry, I'm not an admirer of them.

The industry term invented by the people who manufacture them is "Permanent Wood Foundations".

They might be OK if the contractor adheres strictly to the manufacturer's recommendations, but many don't. When contractors don't, foundations fail. They fail by buckling and decaying.

DISCLAIM, DISCLAIM DISCLAIM!




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  #7  
Old 6/19/09, 8:33 AM
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Default Re: PWF - what type of wood is used?

I am just surprised they still use them.
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  #8  
Old 6/20/09, 7:23 PM
Jeffery L. Haynes Jeffery L. Haynes is offline
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Default Re: PWF - what type of wood is used?

Quote:
Originally Posted by kshepard View Post
Plywood made from Southern Pine? It is the plywood that forms the main barrier against decay, right?
Are we talking about the same acronym Ken.......Permanent Wood Foundations?.......where SP is the main species used and pretreated?

lol
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  #9  
Old 6/21/09, 12:27 AM
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Default Re: PWF - what type of wood is used?

http://www.nachi.org/gallery/foundat...ation-poly.jpg



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  #10  
Old 6/23/09, 12:34 PM
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Default Re: PWF - what type of wood is used?

http://www.nachi.org/permanent-wood-foundations.htm



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  #11  
Old 6/26/09, 1:32 AM
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Default Re: PWF - what type of wood is used?

Quote:
Originally Posted by jhaynes View Post
Are we talking about the same acronym Ken.......Permanent Wood Foundations?.......where SP is the main species used and pretreated?

lol
Jeff, yep... same thing. CA and AO Hem fir is used for treated lumber.




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  #12  
Old 6/26/09, 8:12 AM
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Michael Roberson Michael Roberson is offline
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Default Re: PWF - what type of wood is used?

They are not uncommon in this neck of the woods, I put one in 20 years ago, and the house is still standing (I guess) My 10:00 inspection today is a PWF, I'll take good pictures.
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  #13  
Old 6/26/09, 8:20 AM
Larry D. Kage Larry D. Kage is offline
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Default Re: PWF - what type of wood is used?

Quote:
Originally Posted by rlondon View Post
Can PWFs use the same wood as the kind used in decks, or do they us a wood that is specially treated just for PWFs?
Typically, the pressure treatment saturation point is increased for ground contact, etc.


See:

http://www.americanpoleandtimber.com...edlumber.shtml



Pressure Treatments

We specialize in treated wood products. We sell wood and pressure treated lumber products to your specifications and in accordance with national and local regulations.

Most dimensional pressure treated lumber is treated to .25 or .40 pcf in ACQ. Larger dimensional lumber (2x8 and above) can be treated to .60 pcf with CCA but only for use in certain commercial construction applications. We usually recommend .60 pcf (CCA or ACQ) for freshwater use, ground contact, or extreme weather conditions, .80 CCA for government specifications or brackish (salty fresh) water, and 2.5 pcf CCA for projects in saltwater.



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  #14  
Old 6/26/09, 9:20 AM
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Michael Roberson Michael Roberson is offline
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Default Re: PWF - what type of wood is used?

Quote:
Typically, the pressure treatment saturation point is increased for ground contact, etc.

The term used in lumber yards is G.C. or Ground contact. Most posts are GC rated, but not all. "treated" is now a more generic term in my opinion, at least not specific enough. The term doesnt tell you if it it GC or not.

Larry, We still need to meet for coffee sometime. Summer busy?
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  #15  
Old 6/29/09, 7:33 PM
Tim C. Howell Tim C. Howell is offline
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Default Re: PWF - what type of wood is used?

I'm due to inspect a wooden home foundation this week. Any tips on what to look for beside detailed moisture testing and bowing.

I read some more and found what I was looking for. Should have read more first

Last edited by thowell; 6/30/09 at 7:07 PM.. Reason: found some more info
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