Dow THERMAX™ Exposed Basement Applications - Manual (Page 2)

Installation
THERMAX ™ insulations may be
attached directly to the basement
wall with construction-grade
adhesive or with the PVC inter-
lock joint closure system. Both
installation methods offer a
quick and easy alternative to
using studs, batt insulation and
drywall.
OPTION 1: ADHERE DIRECTLY
TO WALL
1. Provide proper ventilation
and wear gloves and eye
protection.
2. Apply heavy beads (min.
bead size 3/8") of ENERBOND ™
MH or SF Polyurethane
Adhesive or appropriate
construction-grade adhesive
to the wall (Figure 2). Note:
Follow adhesive manufacturer
recommendations for
application pressure and cure
times for proper adhesion to
masonry walls.
2
I N S T A L L A T I O N I N F O R M A T I O N
3. Press insulation board
against the wall and butt
board edges tightly together
(Figure 3). Apply pressure to
board until the adhesive is
set. (Optional: Attach
mechanical fasteners to the
top and bottom of the board
to hold it in place until the
adhesive has set.)
4. For additional insulation
value and protection against
air infiltration, apply a small
bead of GREAT STUFF
™ Pro
Gaps & Cracks along board
seams. Take care that foam
does not get on insulation
facer during application.
Allow foam to fully cure,
then trim excess with a
serrated knife.
5. Cover seams between insula-
tion boards with aluminum
or white foil tape (Figure 4).
Before applying tape, wipe
the application area with a
damp cloth to remove foam
dust. Allow surface to air dry.
Use a squeegee or soft paint
roller to press the tape firmly
to the joint. Cut tape with a
knife or scissors. Do not tear
tape.
Figure 2
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OPTION 2: PVC INTERLOCK
JOINT CLOSURE
For additional moisture control
and a more finished appearance
when insulating with THERMAX
™
White Finish insulation, use
the PVC interlock joint closure
system. The PVC interlock
joint closure system is com-
posed of a 2" wide PVC base
strip that is attached to the
wall at vertical joint locations
and a top “T” section that
snaps into the base, holding
the insulation boards to the
wall. The top “T” sections are
available in sizes to accommo-
date board thicknesses of 1",
1.5" and 2". Select the correct
top “T” section size for your
application. Both the PVC base
strip and top “T” sections are
sold in 10' lengths.
1. Measure and mark vertical
lines for the placement of
the PVC base strips. Space
the PVC base strips for the
correct width of the insula-
tion board (Figure 5). Allow
1/8" between the insulation
boards to accommodate the
width of the PVC base strip.
2. Fasten PVC base strip to con-
crete or masonry wall every
12" with a pneumatic nailer
or equivalent (Figure 6).
Figure 5
Figure 6
Figure 3
Figure 4