Cutting
THERMAX
™
insulation prod-
ucts may be cut with a straight
edge and utility knife or with
a small handsaw. See Figures
1a and 1b.
Figure 1a
Materials Checklist
To install THERMAX
™
Sheathing or THERMAX
™
White Finish insulation, you
will need:
• Utility knife or small
handsaw
• Straight edge
• Safety glasses/goggles and
gloves
• Ventilation or respiratory
protection for application
of polyurethane foam
sealant
• Measuring tape
• Pencil
• Construction-grade
adhesive such as
ENERBOND
™
MH or SF
Polyurethane Adhesive
• THERMAX
™
aluminum foil
or white foil tape (for
Option 1)
• Mechanical fasteners
(optional for Option 1)
• Squeegee or soft paint
roller (for Option 1)
• PVC interlock joint closure
system (for Option 2)
• Polyurethane-compatible
construction-grade caulk/
sealant (for Option 2)
• Polyisocyanurate-
compatible insulating
foam sealant such as
GREAT STUFF
™
Pro Gaps
& Cracks
Before installing THERMAX
insulation on the interior
basement wall, be sure there
are no leaks or structural
cracks in the wall. THERMAX
products insulate the base-
ment wall; they do not stop
water leakage.
®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
*See International Code Council National Evaluation Services Report NER-681.
new homes/
remodeling
THERMAX
™
Sheathing and
THERMAX
™
White Finish (WF)
insulation offer two quick and
easy options to insulate base-
ment walls. Lightweight and
easy to install, both products
are ideally suited for exposed
basement applications, whether
the desired result is a semi-
finished or finished appearance.
THERMAX Sheathing and
THERMAX White Finish are non-
structural, rigid boards consisting
of a glass-fiber-reinforced poly-
isocyanurate foam core with
solid aluminum facers on both
sides. The exposed surface of
THERMAX Sheathing is reflective
foil, perfect for use in areas such
as a laundry room or storage
space. THERMAX White Finish
insulation features an embossed
white acrylic-coated aluminum
facer on its exposed surface,
for a clean, finished wall that
is durable and washable.
THERMAX products can be
left exposed to the interior
without a thermal barrier in
most applications.* THERMAX
insulation products are Factory
Mutual approved as “Wall-
Ceiling Construction, FM
Approvals Standard FM 4880,
Metal Faced – Class 1 Fire Rated
to a max. 30 ft High.”
United States
INSTALLATION INFORMATION
RESIDENTIAL
INSTALLATION PROCEDURES
FOR THERMAX
™
INSULATIONS
Exposed Basement Applications
foundations
slabs
sills
attics
walls
ceilings
roofs
Figure 1b
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