Fiber Glass Insulation
Enhanced with Bio-Based Binder
Formaldehyde-free: will not off-gas
formaldehyde in the indoor environment.
Thermal Efﬁ ciency: provides effective
resistance to heat transfer with R-values
up to R-30 (RSI-5.3).
Sound Control: reduces transmission of
sound through exterior and interior walls
and ﬂ oor or ceiling assemblies.
Fire Resistant and Noncombustible:
see Speciﬁ cation Compliance.
Durable Inorganic Glass: will not rot,
mildew or deteriorate and is noncorrosive
to pipes, wiring and metal studs.
Superior Performance: bonded glass
ﬁ bers are dimensionally stable and will
not slump within the wall cavity, settle or
break down during normal applications.
ENERGY AND ENVIRONMENT
Johns Manville is committed to creating more comfortable, healthier and energy-
efﬁ cient indoor environments. We revolutionized the building insulation industry by
pioneering the development of Formaldehyde-free
ﬁ ber glass building insulation
over a decade ago. We continue to build on our legacy of innovation with a new
ﬁ ber glass insulation solution that utilizes an innovative bio-based
binder, made mostly with rapidly renewable plant-based materials, that offers excellent
thermal and acoustical performance as well as improved handling, easier cutting and
less dust than our previous product. At JM, we believe that in every detail,
JM ComfortTherm poly-encapsulated thermal and acoustical ﬁ ber glass insulation is
lightweight and made of long, resilient glass ﬁ bers bonded with our bio-based binder.
ComfortTherm is wrapped in plastic for more comfortable installation with less itch
and dust. The product is available with a vapor-retarder plastic facing, and also with a
plastic facing that does not act as a vapor retarder for use in hot, humid climates.
• Pre-cut batts – ﬁ t standard wall cavities and are faster to install than roll products.
• Rolls – can be cut to ﬁ t any size wall cavity and installed in any part of a building—
especially useful for long, unobstructed areas such as attics or crawl spaces.
JM ComfortTherm 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 walls, ﬂ oors
and ceilings for thermal and sound control, as well as basement wall insulation.
Retroﬁ t: Adding insulation to attics, crawl spaces and above suspended ceilings.
ComfortTherm batts are sized to ﬁ t standard cavities. JM ComfortTherm insulation
can easily be cut with an ordinary utility knife to ﬁ t nonstandard cavities—install it by
simply pressing in place between studs or joists. JM ComfortTherm insulation can be
secured by stapling the ﬂ anges to wood studs.
JM ComfortTherm insulation is compression-packaged for savings in storage and
In colder climates, 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.
The plastic facing of standard JM ComfortTherm insulation is a vapor retarder.
JM ComfortTherm insulation with a non-vapor-retarder facing is also available. Check
your local building code for vapor-retarder requirements.
Refer to JM guide speciﬁ cations for further design considerations and required
LIMITATIONS OF USE
Check applicable building codes.
PRODUCT DATA SHEET