Dow THERMAX™ Wall System - Manual (Page 2)

OPTION 2
For exterior applications (steel
stud walls and standing seam
metal roofs).
1. Measure and cut
WEATHERMATE™ Straight
Flashing (4" or 6" width) to cover full
length of insulation boards. (Flashing
is applied on the exterior of steel
stud walls and exterior/top edge of
standing seam metal roofs.)
2. Peel back part of release liner
and center flashing over dry,
clean edge joint.
3. Remove release liner while
pressing flashing firmly along
the joint. (Figure 2)
OPTION 3
Requires shiplap edge boards
1. Apply GREAT STUFF PRO™
Gaps & Cracks Insulating Foam
Sealant* or a compatible
construction grade sealant to
shiplap edge, following
manufacturer instructions.
2. Fit next THERMAX™ board
firmly into the sealant-lined
shiplap edge and fasten.
(Figure 3)
3. Center THERMAX™ tape over
dry, clean edge joint and apply
tape.
4. Use a squeegee or stiff bristle
brush to press the tape firmly to
the joint. Cut tape with a knife.
Do not tear tape.
OPTION 4
Requires square edge boards
1. Fasten Clip Strip to wall or
ceiling through holes provided
at 12" o.c. with pneumatic
nailer or equivalent.
2. Adjust Clip Strip to insulation
board to allow for correct width.
Align each PVC section 1/8"
from the insulation board mark
and attach.
3. Apply a construction-grade
sealant to the single long flange
of the Clip Strip, following
sealant manufacturer
instructions.
4. Slide THERMAX™ Insulation
boards into place as shown.
(Figure 4)
Note: High-humidity metal buildings
may require two insulation layers for
optimum moisture control. Visit
www.DowMetalBuilding.com for installation
recommendations for high-humidity
applications (Form No. 179-04338).
OPTION 5
For direct adhesion to concrete or
masonry walls
1. Fasten base section of
Interlocking System to concrete
or masonry wall through holes
provided at 12" o.c. with
pneumatic nailer or equivalent.
2. Adjust base strip to insulation
board to allow for correct width.
Align each PVC section 1/8"
from the insulation board mark
and attach.
3. Apply beads of construction
grade adhesive to the concrete
centered 16" o.c. between the
PVC strips.
4. Press board firmly into position
between the PVC base strips
and allow curing time, following
adhesive manufacturer
recommendation.
5. Apply a continuous bead of
sealant along the face of the
boards next to the joint.
6. Guide the top PVC section
along insulation board edge
until it snaps into the
Interlocking System base.
(Figure 5)
P R O D U C T / I N S T A L L A T I O N I N F O R M A T I O N . C O M M E R C I A L . P R O T E C T I O N M A N A G E M E N T
Figure 2
Figure 3
Figure 4
®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
*Consult label and MSDS carefully before use.
Figure 5
Shiplap Edge Treatment
THERMAX™ Insulation with WEATHERMATE™
Flashing Applied
PVC attached to tilt-up wall
View from above – looking down wall
View from above – looking down wall