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Quadra-Fire • Hudson Bay Installation Manual_R26 • 01/20
2. Cathedral Ceiling
Step 1 -
Follow installation Steps 1 and 2 under
V
ertical
Installation Section G.
Step 2 -
Remove shingles or other roof covering as necessary
to cut the rectangular hole for the support box. Cut the hole
1/8 in. (3mm) larger than the support box outline.
Step 3 -
Lower the support box through the hole in the roof
until the bottom of the support
box protrudes at least 2 in.
(51mm) below the ceiling (Figure
5.17). Align the support box
both vertically and horizontally with a level. Temporarily tack
the support box in place through the inside walls and into the
roof sheathing.
Step 4 -
Using tin snips, cut the support box from the top
corners down to the roof line, and fold the resulting flaps
over the roof sheathing
(
Figure 5.18
). Before nailing it to
the roof, run a bead of non-hardening mastic around the
top edges of the support box to make a seal between it and
the roof.
Clean out any combustible material from inside the
support box.
Step 5 -
Assemble the desired lengths of pipe and elbows
necessary to reach from the appliance up through the round
support box. Ensure that all pipe and elbow connections are
in their fully twist-locked position. Assemble as instructed.
Step 6 -
Place the support clamp (provided with the support
box) inside the support box (at the bottom), and secure
to the pipe section. The clamp allows the support box to
support the weight of the pipe sections. Continue to add
pipe sections until you are above the roof line.
Step 7 -
Complete the cathedral ceiling installation by
following the same procedures outlined in steps 7 through 9
under
V
ertical Installations, Section G
.
Step 8 -
Install the black trim collar around the outside of the
cathedral ceiling support box (Figure 5.19). The two pieces
of the trim collar slide over one another to allow for easy
adjustment around the support box. Using the six screws
provided, secure the four corners and the overlapping
sections of the trim collar to the ceiling. You may want to
predrill the holes for the overlapped sections for ease of
installation.
LEVEL
CATHEDRAL CEILING
SUPPORT BOX
2 in. (51mm)
MIN. BELOW
FINISHED
CEILING
CUT HOLE 1/8 in.
(3mm) GREATER IN
SIZE THAN PATTERN
OF SUPPORT BOX AS
IT IS PROJECTED
ONTO ROOF LINE
Figure 5.17
Figure 5.18
CATHEDRAL
CEILING
SUPPORT
BOX
TRIM COLLAR
SCREWS
Figure 5.19
