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what is the difference between R13 and R15 insulation?

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  • KMS Woodworks
    KMS Woodworks Nederland, CO

    r-2....R-13 is what typical 2 x4 walls are filled with (fiberglass batt) a 2 x 6 wall uses R-19 batts
    Ceiling should be insulated to R-30 to R-50. 12" of fiberglass gets you to the r-38

  • 3sonscrazy
    3sonscrazy Fort Collins, CO

    R values are a measure of thermal resistance, measured as area multiplied by temperature and divided by BTU, or unit of energy. Without getting really technical, it just means that R15 insulation will block heat transfer slightly better than R13, but

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