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  1. #1
    Join Date
    Jul 2013
    Posts
    1

    Default insulation for metal roof

    I would like to convert an attic into living space. The house has a metal roof that is directly on the rafters (2x6). I am trying to decide how to best insulate this before closing it in. There is currently no insulation. I would prefer fiber glass batt insulation, but need to know how thick. Should there be an air space between bare metal and fiber glass? I would use faced batting with facing on interior side (toward room). Some of the insulation will be directly next to metal roof (along slant of roof) and some will leave a small air space (at top of A frame). I plan on using wood paneling to finish walls and ceiling.

    Also, I live in southern Louisiana, so ice and snow is not a concern. Any advice is greatly appreciated!

  2. #2
    Join Date
    Jul 2013
    Location
    Northern Wisconsin
    Posts
    4

    Default Re: insulation for metal roof

    How noisy is the space currently when it rains? Often I hear of people using an open-cell polyurethane spray foam which beyond the R-value is great at reducing the noise from the metal roofing. I've seen products and some of the big-box improvement stores but haven't had a chance to try the products at all.

  3. #3
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,949

    Default Re: insulation for metal roof

    Paneling will sag from the heat.

    In my fair city all living spaces are required to be fully sheathed in drywall, even under any paneling.

    Spray foam would be best, followed by a foil backed radiant barrier below the roof rafters.

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