Pvc pipe penetration through wood

aholdJune 6, 2014

I have a radon pvc pipe that is being penetrated through the perimeter joist up the attic, and it doesn't seem that it has too much free space around it. Should I worry about the wood joist contracting or expanding and crack the pvc pipe? I started wondering after I saw how much my hardwood floors were gapping over the winter due to shrinkage. And around the pvc pipe, there's some pink hard substance that looks like cement, probably for insulation purpose.

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Not really a concern. Have never seen a problem actually occur like you ask about.

    Bookmark   June 7, 2014 at 1:12AM
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You should have no problems. It takes a lot of pressure to crack a PVC pipe.

The "pink hard substance that looks like cement" is spray foam insulation.

Pink or orange indicates that that it is Fire proof or fire blocking and it is the correct type for this application. For fire proof type insulation should or must be applied anywhere a line or pipe passes through a wall or floor.

    Bookmark   June 9, 2014 at 12:33AM
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Thanks for your response. I just kept thinking the studs will shrink or expand like the floors.

    Bookmark   June 14, 2014 at 8:45PM
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