Specification
PERFORMANCE ADVANTAGES
Formaldehyde-free: will not off-gas
formaldehyde in the indoor environment.
Thermally Ef cient: provides effective
resistance to heat transfer with R-values
up to R-49 (RSI-8.6).
Sound Control: reduces transmission of
sound through exterior and interior walls
and oor or ceiling assemblies.
Fire Resistant and Noncombustible:
see Physical Properties.
Durable Inorganic Glass: will not rot,
mildew or deteriorate and is noncorrosive
to pipes, wiring and metal studs.
Superior Performance: bonded glass
bers are dimensionally stable and will
not slump within the wall cavity, settle or
break down during normal applications.
ENERGY AND ENVIRONMENT
COMPANY
Johns Manville, a Berkshire Hathaway company, was founded in 1858. Our ownership
by Berkshire Hathaway, one of the most admired companies in the world and one of
the most nancially secure, allows JM to invest for the future. This enables JM to
continue delivering the broadest range of insulation products in the industry and
offering innovative solutions that meet your needs.
DESCRIPTION
JM Formaldehyde-free
™
thermal and acoustical insulation is made of long, resilient
glass bers bonded with a thermosetting resin. A wide range of thermal resistance
R-values is available to provide thermal control for both vertical and horizontal
applications. JM insulation is available unfaced or with a variety of facings,
including kraft or foil vapor retarder.
USE
JM Formaldehyde-free
™
thermal and acoustical insulation can be used in a
wide variety of wood frame, engineered wood and steel frame construction
applications, including:
New Construction: residential homes and commercial buildings interior and
exterior walls, oors and ceilings for thermal and sound control, as well as basement
wall insulation.
Retro t: adding insulation to attics, crawl spaces and above suspended ceilings.
INSTALLATION
JM insulation cuts easily with an ordinary utility knife, and unfaced or tabless
versions install easily by simply pressing in place between studs or joists in standard
framing. Standard facings have stapling tabs for attachment to framing if additional
securement is required.
PACKAGING
JM insulation is compression-packaged for savings in storage and freight costs.
DESIGN CONSIDERATIONS
Kraft and standard foil facings on this product will burn and must not be left exposed.
It must be covered with gypsum board or another approved interior nish. Where an
exposed application is required, use FSK-25 ame-resistant faced insulation.
In colder climate areas, vapor retarders (whether attached to the insulation or applied
separately) are often placed toward the heated or conditioned side of the wall. This is
done to reduce water vapor penetration into the wall from the building interior.
Check your local building codes for vapor retarder requirements.
Refer to JM guide speci cations for further design considerations and required
installation instructions.
LIMITATIONS OF USE
Check applicable building codes.
*
Note: Color of product will differ based on the manufacturing
location.
* GREENGUARD certi cation is not intended for residential
environments. Instead, the certi cation is intended only for
buildings meeting ASHRAE 62.1-2007 commercial building
ventilation rates. This certi cation is proof that the product meets
the GREENGUARD Environmental Institute’s indoor air quality
standards and product emission standards for VOCs.
Formaldehyde-Free
™
Fiberglass Insulation
UNFACED | KRAFT FACED | FOIL FACED