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  1. #1

    Default Question on foam insulation in a kneewall attic

    I inspected a very upscale home for a relo company a couple of days ago. I'd like feedback on the presence of foam insulation in a crawlspace attic. Both extruded polystyrene and a polyisocyanurate insulation boards were present.
    I know these can't be exposed in a basement or living space, but what about a kneewall attic adjacent to living space. The doors to the space were not all fire rated.
    Looking for answers before I do this report so this doesn't come back to bite me.

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  2. #2
    Join Date
    Mar 2007
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    Default Re: Question on foam insulation in a kneewall attic

    Quote Originally Posted by Ernie Simpson View Post
    I inspected a very upscale home for a relo company a couple of days ago. I'd like feedback on the presence of foam insulation in a crawlspace attic. Both extruded polystyrene and a polyisocyanurate insulation boards were present.
    I know these can't be exposed in a basement or living space, but what about a kneewall attic adjacent to living space. The doors to the space were not all fire rated.
    Looking for answers before I do this report so this doesn't come back to bite me.
    Ernie,

    I can't imagine it to be a problem. Obviously, if this is installed between studs, there will be gaps where the panel is cut and stuffed into the stud bay, but that should not be a huge deal. If you have specific concerns regarding the method of installation, checking the manufacturer's website would be your best bet.

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  3. #3
    Herb Scott's Avatar
    Herb Scott Guest

    Default Re: Question on foam insulation in a kneewall attic

    Good Question. I've seen it at a number of locations, with the label stating that it must be covered with approved material / 1/2 inch drywall. If I can see any foam insulation, either sprayed or board form, I call it and make my client aware of the potential concerns. Weather or not it needs to be covered in a knee-wall , crawlspace or an attic likely depends on the manufacture,s requirements and / or the municipality's requirements.


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