Unfaced Fiberglass

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For effective management of heat flow and unwanted noise, Johns Manville Unfaced batts and rolls provide heat control from the exterior while effectively controlling noise in interior walls.

Johns Manville Formaldehyde-free™ Unfaced thermal and acoustical insulation offers R-Values of up to R-49, and is offered in precut batts to fit standard wall cavities or rolls for custom installation in any size cavity. Unfaced insulation reduces sound transmission through walls, ceilings and floors, and can be used in a variety of wood frame, engineered wood and steel frame construction applications, including new construction and retrofit. 

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Advantages
Thermally Efficient: Effective resistance to heat transfer, with R-values up to R-49.
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 within the wall cavity, settle or break down during normal applications.

  ASTM Standards   ASTM C665   Type I
  Flame Spread   ASTM E84   ≤ 25
  Smoke Development   ASTM E84   ≤ 50
  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
Unfaced Fiberglass Data Sheet

 

SDS
Unfaced Fiberglass SDS
Unfaced Fiberglass SDS (ES)

 

WARRANTIES
Limited Warranty

 

Case Studies
Rice University
Castle Pines

INSTALLATION INSTRUCTIONS
Fiberglass Installation Instructions
Fiberglass Installation Instructions (ES)
High Performance Unvented Attic: Install for Performance

 

LITERATURE
Product Selector Guide

 

STC Rating Documents
Acoustical Assemblies STC Rating Reference Guide

Specifications

Fiberglass


JM Fiberglass Video


JM Overview Video


Insulating Your Crawl Space Video


Installating in Your Attic Video


Insulating Around Objects Video


Insulating Floors or Ceilings Video


Installating in Your Attic Video


Installing Wall Insulation Video

Available Documents