Attic Protector Blow-In

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Perfect for hard-to-reach areas within attics, like corners, edges and around framing, Johns Manville Attic Protector® is premium blown-in fiberglass insulation.

Johns Manville Attic Protector® Formaldehyde-free™ premium blow-in fiberglass insulation offers effective thermal and acoustical performance. One bag of Attic Protector provides 62 square feet of R-30 coverage. Installed with a portable blowing machine, it's perfect for covering hard-to-reach areas within attics and provides a more efficient installation for homeowners or remodeling professionals.

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Easy Installation: Insulates attics or spaces of all shapes and sizes without cutting or fitting.
Complete Coverage: Effective in tight spaces, areas with large amounts of cross-bridging or small gaps and voids.
Thermally Efficient: Effective resistance to heat transfer. No settling; no loss of R-value following installation.
Formaldehyde-free: Will not off-gas formaldehyde in the indoor environment.
Sound Control: Reduces sound transmission through exterior and interior walls, floor and ceiling assemblies.
Fire-Resistant: Flame Spread of 25 or less and Smoke Developed of 50 or less.
Resilient Inorganic Glass: No rotting, mildew or deterioration. Also noncorrosive to pipes, wiring and metal studs.
Superior Performance: Stable bonded glass fibers will not slump, settle or break down during normal applications.

  ASTM Standards   ASTM C764   Type I
  Flame Spread   ASTM E84   ≤ 25
  Smoke Development   ASTM E84   ≤ 50
  Critical Radiant Flux   ASTM E970    > 0.12 W/cm(0.11 Btu/ft2s)
  Water Vapor Sorption   ASTM C1104   5% or less by weight
  Odor Emission   ASTM C1304   Pass
  Corrosiveness   ASTM 665   Pass
  Fungi Resistance   ASTM C1388   Pass
  VOC Emissions   ASTM ES Section 011350   Pass
  Combustion Characteristics   ASTM E136   Pass

Data Sheet

Attic Protector Blow-In B785 Data Sheet


Attic Protector Blow-In SDS
Attic Protector Blow-In SDS (ES)

Fact Sheet

Attic Protector Blow-In Fact Sheet




BI Attic Protector Blow-In System Machine Instructions
Attic Protector B-785 Installation Instructions

Attic Cards

Attic Protector B-785 Attic Card


Product Selector Guide
Blowing Wool Coverage Check and Easy Fix Checklist

JM Blow-In Video

JM Attic Protector Blow-In Machine Video

JM Overview Video

Available Documents