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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
13
Framing Dimensions for Roof
Pitch C D
0/12 10¹⁄₂ in. 10¹⁄₂ in.
(267 mm) (267 mm)
6/12 10¹⁄₂ in. 12 in.
(267 mm) (305 mm)
12/12 10¹⁄₂ in. 17 ³⁄₄ in.
(267 mm) (451 mm)
Figure 21
Figure 22
Figure 24
Figure 23
If the vent system extends more than 5' (1.5 m)
above the roof flashing, stabilizers may be
necessary. Additional screws may be used at
section joints for added stability. Guide wires
may be attached to the joint for additional
support on multiple joint configurations.
G. Continue installation of horizontal/inclined
sections - Continue with the installation of the
straight vent sections in horizontal/inclined run
as described in Step C. Install support straps
every 5' (1.52 m) along horizontal/inclined vent
runs using conventional plumber’s tape. It is
very important that the horizontal/inclined run
be maintained in a straight (no dips) and slightly
elevated plane in a direction away from the
fireplace 1/4" per foot (20 mm per meter) of
horizontal vent. Use a carpenter’s level to mea-
sure from a constant surface and adjust the
support straps as necessary.
It is important to maintain the required clear-
ances to combustibles: 1" (25 mm) at all sides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs.
H. Frame roof opening - Identify location for
vent at the roof. Cut and/or frame opening per
Roof Framing Chart and
Figure 21
.
F. Change vent direction to horizontal/in-
clined run - At transition from or to a horizon-
tal/inclined run, install the SV4.5E45 and
SV4.5E90 elbows in the same manner as the
straight vent sections. The elbows feature a
twist section to allow them to be routed about
the center axis of their initial collar section to
align with the required direction of the next
vent run element. Twist elbow sections in a
clockwise direction only so as to avoid the
possiblity of unlocking any of the previously
connected vent sections. See
Figure 20
.
Figure 20
SV4.5E90
(90
° Elbow)
8-1/8"
(206 mm)
Swivel Joint
(360
°
swivel)
4-13/16"
(122 mm)
SV4.5E45
(45° Elbow)
Swivel Joint
(360
°
swivel)
C
D
Storm
Collar
K. Install the vertical termination - The final
step involves installation of the SV4.5CGV-1
Vertical Termination. Extend the vent sections to
the height as shown in the "Vertical vent termina-
tion section" on page 5. The SV4.5CGV-1 Verti-
cal Termination (
Figure 24
) installs in the exact
same fashion as any other Secure Vent section.
Align the termination over the end of the previ-
ously installed section, adjusting the radial align-
ment until the four locking dimples of the termi-
nation are aligned with the inlets of the four
incline channels of the last vent section. Push the
termination down until it fully engages, then twist
the termination clockwise running the dimples
down and along the incline channels until they
seat at the end of the channels.
I. Install the roof flashing - Extend the vent
sections through the roof structure. Install the
roof flashing over the vent section and position
such that the vent column rises vertically (use
carpenters level) (
Figure 22
). Nail along pe-
rimeter to secure flashing or adjust roofing to
overlap the flashing edges at top and sides only
and trim where necessary. Seal the top and
both sides of the flashing with waterproof
caulking.
J. Install the storm collar - Install the storm
collar, supplied with the flashing, over the vent/
flashing joint. See
Figure 23.
Loosen the storm
collar screw. Slide collar down until it meets the
top of the flashing. Tighten the adjusting screw.
Apply non-combustible caulking or mastic
around the circumference of the joint to pro-
vide a water tight seal.