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  1. #1
    Join Date
    Jan 2014

    Default insulating over attic floor boards

    Hello all, new member here. I have a 1939 house that has 6" joists with loose rock wool insulation then wood board flooring. Can I roll R30 or R38 batts insulation right over the floor? Will the air gaps in the loose insulation cause problems? I don't really want to remove the flooring in fear of cracking the plaster ceilings (lots of labor too). The house does not have soffit vents if that helps.

  2. #2
    Join Date
    Dec 2010
    Houston Texas

    Default Re: insulating over attic floor boards

    You can roll insulation right over the boards. To get a tighter fit, you can roll half the thickness in one direction and half the thickness in the other direction.

    Or just use blown-in which will allow you to work in the attic when needed.

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