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Closed cell spray foam under roofing

eh3kYsWqQz| Posted inEnergy Efficiency and Durabilityon

Can one apply closed cell spray on insulation directly to the underside of roofing sheeting to which asphalt shingles are nailed to create a cathedral ceiling? I am looking to create a heated loft above a garage with a gambrel roof.

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  1. Foamer||#1

    In a word, yes. There are several articles on that topic here on GBA.

  2. GBA Editor
    Martin Holladay||#2

    Terry,
    Here's a link to an article that will answer your questions:How to Build an Insulated Cathedral Ceiling.

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