Installation Guide

15 | Diamond Kote Building Products Application Guide 6.18
RIGIDSTACK
™
APPLICATION
• Apply RigidStack™ siding over properly
prepared walls.
(see general information)
• Diamond Kote
®
RigidStack™ is installed
as a blind fastened technique.
• It can be installed by starting with a
RigidStack Metal Starter Strip, or by
stacking onto a Diamond Kote
®
Starter
Board.
• Begin by installing Diamond Kote
®
Nail
Fin Outside Corners and Nail Fin Trim.
• Next, install the appropriate starter
material being sure to keep the bottom
of the RigidStack™ at least 6" from
nished grade.
INSTALL RIGIDSTACK
™
USING
STARTER BOARD
Starter Board can be installed at or below
nished grade. Best practice is to install this
with FastenMaster Cortex
®
Hidden Fastening
System for PVC. Install Starter Board using
Cortex Hidden Fastening System in the
following manner:
Be sure to snap a level line as this will set
the exact placement for the rst course of
RigidStack™ siding.
(Figure 2b)
• If the board is 6-12" wide, use three
Cortex fasteners at every framing
member.
• If the board is less than 6" wide,
use two Cortex
®
fasteners at every
framing member. For more info refer to
CertainTeed
®
Restoration Millwork
®
installation instructions.
• Using the Cortex
®
setting tool, set the
Cortex
®
fasteners perpendicular to the
trim board, spaced a max. of 16" o.c.
• Using a standard 18V cordless impact
drill, drive the fastener to the pre-set
level below the trim surface.
• Place the PVC trim plug into the hole with
the trim-surface-side up and gently tap
until it is ush with the trim board.
• Finish by painting the plugs with Diamond
Kote
®
touch-up paint and a cotton swab.
INSTALL USING RIGIDSTACK
METAL STARTER STRIP
• The bottom edge of RigidStack™ Metal
Starter Strip should be installed at the
foundation along the sill plate or up to
1-1/8" below this to properly hold the
bottom of RigidStack™ in place.
• Placement may vary as required by
course layout.
(see Figure 2c)
• Snap a level chalk line 3-3/8" above
the bottom of where the rst course of
siding will start. Align the TOP of the
Metal Starter Strip on the chalk line.
RigidStack™ Metal Starter Strip will set
the exact placement for the 1st course
of RigidStack™.
• Fasten the RigidStack™ Metal Starter
Strip every 12-16" on center.
 With RigidStack siding, the butt joints are RE-
QUIRED to be covered with a joint molding. See
Figure 11D
 Joint moldings DO NOT space the board for
expansion!
 Leave a 3/16” -1/4” gap between siding pieces.
 The thickness of the joint molding spline should
be added to the 3/16" gap on runs exceeding
32’.
8. The best method is to apply both adjoining
pieces of RigidStack fastening along the entire
length except for the ends, with the required
gap.
9. Then slide the joint molding in place, from the
top of the siding down, with the notched end of
the molding down.
10. Finish fastening by nailing both pieces of siding
at the end of the siding into the stud.
Figure 11D

StarterBoard can be installed at or below finished
grade. Best practice is to install this with Fasten-
Master Cortex® Hidden fastening system for PVC trim.
For more information see CertainTeed Restoration
Millwork installation instructions.

APPLICATION
WSS RigidStack
 Apply siding over properly prepared walls (see
General Information)
 WSS RigidStack is intended to be installed blind
fastened and can be installed by starting with a
RigidStack metal starter strip - or - by stacking
onto a WSS StarterBoard.
1. Begin by Installing WSS outside corners and
trims.
2. Next install the appropriate starter material be-
ing sure to keep the bottom of the WSS Rigid-
Stack at least 6” from finished grade.
For StarterBoard install begin here:
Figure 11A
Be sure to snap a level line as this StarterBoard will
set the exact placement for the 1st course of Rigid-
Stack. (see figure 11A)
If the board is 6"–12" wide, use 3 Cortex fasteners
at every framing member.
If the board is less than 6" wide, use 2 Cortex
fasteners at every framing member.
Figure 2b
 The bottom edge of RigidStack metal starter
strip should be installed at the foundation along
the sill plate or up to1-1/8” below this to
properly hold the bottom of RigidStack in place.
Placement may vary as required by course lay-
out. (see figure 11B)
Snap a level chalk line 3-3/8” above the bottom of
where the first course of siding will start. Align the
TOP of the metal starter strip on the chalk line.
RigidStack metal starter strip will set the exact
placement for the 1st course of RigidStack.
Fasten the RigidStack metal starter strip every 12-
16” o.c.
For metal starter strip install begin here:
Figure 11B
Install StarterBoard using the recommended Cortex
Concealed Fastening System in the following manner:
Using the Cortex setting tool, set the Cortex fasten-
ers perpendicular to the trim board, spaced a maxi-
mum of 16" o.c. Using a standard 18V cordless im-
pact drill, drive the fastener to the pre-set level be-
low the trim surface. Place the PVC trim plug into the
hole with the trim-surface-side up, and gently tap
until it is flush with the trim board. Finish by painting
the plugs with Diamond Kote touch up paint and a
cotton swab.
5. Fasten the siding by nailing through the nailing
line (about 3/4” from top edge of siding) at
EACH STUD LEAVING NO MORE THAN 16 in. BE-
TWEEN NAILS. Begin nailing at one end of the
siding and work toward the other end to prevent
rippling of the siding. Do not countersink nail
heads.
6. Then install subsequent courses of siding so that
the plastic spline fits over the top edge of the
previously installed piece of siding.
7. The butt joints between adjacent siding pieces
must be located over the middle of a stud.
 Make sure that the spline is firmly seated to the
top of the previous course BEFORE and DURING
nailing to ensure the material lines up at the butt
joints and at course lines at the corners.
3. Now install the first course of siding so that the
plastic spline fastened into the back of the sid-
ing fits over the beveled edge of the starter
board (Figure 11A) or into the metal starter strip
as shown in (Figure 11B).
4. LEAVE A 3/16” GAP WHERE SIDING BUTTS
AGAINST TRIM TO ALLOW FOR EXPANSION. See
Figure 11C.
Figure 11C

Figure 2c
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