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Attic Protector R- 19 Fiberglass Blown-In Insulation with Sound Barrier 109-sq ft per bag ( 25.2-lb )

Johns Manville Attic Protector R- 19 Fiberglass Blown-In Insulation with Sound Barrier 109-sq ft per bag ( 25.2-lb )

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I have a 762 sq. ft. attic. I would like to achieve an R60 value. How many bags will that require? Thank you


To achieve an R-60, according to our technical data sheet, you will need 22.6" minimum thickness. https://www.jm.com/content/dam/jm/global/en/building-insulation/Files/BI%20Data%20Sheets/Resi%20and%20Commercial/JM_BIC-262-Attic-Protector-Data-Sheet.pdf

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