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Old 08-31-2008, 07:35 AM   #1
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Does a sill need to be PT?


I'm tore down a sunroom to get to the top side of an open cell cinder block foundation so that I can fill the the open cells. The 80 year old 4x8 sill is in perfect condition. Is there a code that says this must be PT or can I recycle the existing sill?

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Old 08-31-2008, 09:08 AM   #2
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Does a sill need to be PT?


is there a permit for the job? At least install a termite shield.

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Old 08-31-2008, 10:45 AM   #3
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Does a sill need to be PT?


The money savings of recycling the original won't offset the potential for future damage. I'd suggest putting a treated sill plate back in. That could be ACQ, Wolmanized, or Borate treated.

And yes, the code requires any concrete/masonry contact wood to be pressure treated.
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Old 08-31-2008, 06:10 PM   #4
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Does a sill need to be PT?


Yes permitted, I pull permits on all my projects.
Your probably right with the PT, but I was thinking if it made it 80 years and it's still in great shape with concrete contact, why not extend it's life. When I rebuild, it wouldn't be in direct contact, there would be a layer of that thin pink foam between the sill and foundation.
I spent my day tearing down the old sunroom and I'm down to the floor. Maybe when I get a closer look at the sill, it might be a different story.
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Old 08-31-2008, 06:51 PM   #5
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Does a sill need to be PT?


Quote:
Originally Posted by Clutchcargo View Post
...When I rebuild, it wouldn't be in direct contact, there would be a layer of that thin pink foam between the sill and foundation....
You are referring to "sill-foam".

Sill foam is used as a means to limit air-infiltration (insulation). It is not a true moisture barrier, or recognized as a material the will inhibit the wood from rotting. You still are required by code to use P.T. as a mud sill plate.

Sill foam: http://www.dow.com/styrofoam/lowes/p...s/sillseal.htm
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Old 08-31-2008, 08:22 PM   #6
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Does a sill need to be PT?


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You are referring to "sill-foam".

Sill foam is used as a means to limit air-infiltration (insulation). It is not a true moisture barrier, or recognized as a material the will inhibit the wood from rotting. You still are required by code to use P.T. as a mud sill plate.

Sill foam: http://www.dow.com/styrofoam/lowes/p...s/sillseal.htm
x2!!!

Here, we call it sillsealer.
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Old 09-01-2008, 07:39 AM   #7
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Does a sill need to be PT?


Thanks guys, I won't salvage the sill plate for this application. I'll use it someplace else.

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