Fiberglass

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For thermal and acoustical performance that lasts, Johns Manville Kraft-faced Formaldehyde-free™ fiberglass insulation is paper-faced to help control moisture in concealed applications.

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

KF_R13_15B_K1241_PROD 190x122

Note: Color of product may differ based on the manufacturing location.

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.
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 II, Class C, Category 1
  Water Vapor Permeance Facing   ASTM E96   1.0 Perms (57 ng/Pa-s-m2)
  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


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