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Pass the vent vertically through the hole in the roof and fasten
to the roof support. The top part of the vent must be at least 16
inches higher than the highest part of the hole.
Make sure you have the correct flashing model; different
models that will fit your roof's slope are available at your retailer.
Slide the flashing on the connector to have it sit flat on the roof.
There must be a good layer of sealant between the flashing and
the roof to waterproof the assembly. The vent must come up at
least ¾ in. above the flashing. Paint the flashing to increase useful
life and tightness. Replace shingles at the base of the flashing.
Adjust the storm collar to the vent connector and apply a
generous layer of latex-based sealant on the top edge of the
flashing and slide the collar to make contact. Apply pressure to
seal assembly (figure 3.2.3.8.e) Encase the vent on the connector
and tighten.
3.2.4
ASSEMBLY AND FASTENING OF VENT SECTIONS
3.2.4.1
FLEXIBLE VENT SECTION ASSEMBLY
Use two connecting tubes to assemble two flexible
sections; one with a 4 in. diameter and another one with a
7 in. diameter. Pull out the inner part (Ø 4 in.) from both
flexible sections and apply a generous bead of latex-based
sealant inside one of the sections. Then assemble the 4 in.
connecting tube with the 4 in. flexible pipe. Sections must
overlap over more than 2 in. Fasten using three self-drilling
screws. Repeat operation to assemble the other 4 in.
section to the 4 in. connecting tube. This procedure also
applies to 7 in. sections.
The use of flexible pipes requires the use of supports every
3 ft. (1 m). These supports can also be used with hard exhaust pipes when necessary
3.2.4.2
HARD VENT SECTION ASSEMBLY
• Apply a generous bead high-temperature latex-based sealant inside the female part of each section as shown
in figures 3.2.4.2.a and 3.2.4.2.b.
Figure 3.2.4.2.a
• Connect the two sections and have them overlap on at least 1.5 in. (3.8 cm).
• Fasten both sections together with three self-drilling screws as shown in figure 3.2.4.2.c.
Figure 3.2.4.2.b
Figure 3.2.3.8.d
Figure 3.2.3.8.e
Figure 3.2.4.1.a
.
Figure 3.2.4.2.d
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