Attic Protector Blow-In Fiberglass

Johns Manville Attic Protector is a premium blown-in fiberglass insulation engineered for hard-to-reach attic spaces — corners, edges, and around framing — where batts struggle to deliver consistent coverage. Installed with a standard insulation blowing machine over new or existing insulation, the product can be built up to R-70 over 1/2" ceiling drywall without exceeding ceiling weight limits.

Attic Protector is formaldehyde-free, GREENGUARD Gold Certified, and made of resilient inorganic glass that will not rot, mildew, or deteriorate, and is non-corrosive to pipes, wiring, and metal studs. It achieves a 25/50 fire rating, reduces sound transmission, and will not settle or lose R-value over time.