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Thread: Spray foam? Around pipes in concrete slabs.

  1. #1
    Homeowner geniescience's Avatar
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    Default Spray foam? Around pipes in concrete slabs.

    I have read that pipes should not come in direct contact with concrete. Mine are copper and cast iron. I'm in a high rise concrete building.

    In a highrise building, to prevent air from rising from one floor to the next, should I spray foam into slab openings? It's bad air. I want to stop it from going through my living space and my wall cavities.

    Some people have already used concrete to fill the gaps.

    david

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    You might want to consider fireproof caulking. It would provide more than one thing - block the air you don't want, and give you (a little bit) more fire proofing between floors/units.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Commercial Plumber markts30's Avatar
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    Quote Originally Posted by jadnashua
    You might want to consider fireproof caulking. .
    I agree....
    As a matter of fact, that is all we use for penetrations between floors...

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