Dow THERMAX Light Duty - Manual

Figure 1
installation information . commercial . united states
Installation Procedures for THERMAX
™
Light Duty Insulation on Tilt-up Walls
®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
*International Energy Conservation Code (IECC) at www.energycodes.gov and American Society of Heating, Refrigerating and Air-Conditioning Engineers at www.ashrae.org
THERMAX ™ Light Duty Insulation,
when installed on the interior of
tilt-up concrete walls, enhances the
building’s thermal performance and
moisture management and helps meet
continuous insulation requirements
mandated by energy efficiency codes
and standards, such as IECC and
ASHRAE 90.1.* The product can
be installed exposed to the interior
without a thermal barrier.
THERMAX ™ Light Duty Insulation
is lightweight and easy to install and
can be adhered directly to concrete
or masonry walls. It consists of a
glass-fiber-reinforced polyisocyanurate
foam core laminated with a 1.25
mil embossed white acrylic-coated
aluminum facer on one side and
1.25 mil embossed aluminum on
the other side. The facers make it a
durable choice for use in light-impact
areas. It can be pressure-washed up to
1,000 psi with a 15-degree or greater
spray tip (at minimum 3' distance).
MATERIALS CHECKLIST
• THERMAX ™ Light Duty Insulation
(code-approved thickness at
minimum)
• Utility knife or small handsaw
• Straight edge
• Measuring tape
• Pencil
• Pneumatic nailer (or equivalent)
• PVC (polyvinyl chloride) interlocking
system (Figure 1)
• Self-impaling nails/fasteners and
1.25" diameter (min.) plastic washers
• Construction-grade adhesive
• Silicone, polyurethane or butyl
sealant (Table 1)
• Safety glasses
INSTALLING THERMAX
™
LIGHT DUTY INSULATION
1. Install THERMAX ™ Light Duty
Insulation boards along the bottom
perimeter of the interior walls by
applying a 3/8" bead on the back
side of boards at 5' horizontally.
2. Apply a 3/8" bead of polyurethane
or butyl caulk to the top of each
board and around each cut pen-
etration (joist pockets, conduits,
cutouts, etc.).
3. Install PVC interlocking system
vertically with self-impaling nails/
fasteners and washers (Figure 1).
4. Fasten nails/fasteners and wash-
ers through front face of insulation
board at 5' o.c. vertically.
5. Apply a 3/8" bead of sealant to
the bottom flange of all J-Channel
molding (Figure 2).
Tilt-up Wall with THERMAX™ Light Duty Insulation
TABLE 1: RECOMMENDED SEALANTS FOR USE WITH
THERMAX™ LIGHT DUTY INSULATION
MATERIAL RECOMMENDED SEALANT
Silicone Dow Corning 790 Silicone Building Sealant
Polyurethane Sika Sikaflex-201 US Polyurethane Sealant
Polyurethane Schnee-Morehead Permathane SM7108 Polyurethane Sealant
Butyl Tremco Vulkem 116 Sealant
PVC Strips