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How do you insulate an open web truss cathedral ceiling? (The spaces in the web being the issue.)

dagrant | Posted in Green Products and Materials on

the web space is 15 inches

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  1. GBA Editor
    Martin Holladay | | #1

    Dan,
    I wouldn't use fiberglass batts if I were you. I would use either blown-in cellulose or blown-in fiberglass if you want the roof assembly to be vented, or spray foam if you want the roof assembly to be unvented. More information here: How to Build an Insulated Cathedral Ceiling.

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