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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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How many bags do I need to achieve R60 in a 100 square foot attic? Why does Lowe’s list this product for a maximum of R19 if it can do R60?


To achieve an R-60 you need 22.5 inches thickness. Please revie the attic card. Each bag will cover about 30sq.ft to you will need 4 bags to cover 100sq ft. Attic card link: https://www.jm.com/content/dam/jm/global/en/building-insulation/Files/BI%20Toolbox/BID-356-Attic-Protector-Attic-Card-B-785.pdf

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