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. 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
  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

Certifications and Specifications

Loose Fill Fiberglass EPD


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