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PENETRATING THE ROOF
To maintain a 1” (GM36) or 2” (GM42/GM50) clearance to
the pipe on a roof with a pitch, a rectangular opening must be
cut.
STEP 1:
Determine the center point through which the pipe
will penetrate the roof.
STEP 2:
Determine the center point of the roof. Pitch is the
distance the roof drops over a given span, usually 12 inches.
A 6/12 pitch means that the roof drops 6 inches for each 12
inches one measure horizontally down from the roof rafters.
STEP 3:
Use the roof opening chart (figure 11) to determine
the correct opening length and flashing required.
STEP 4:
Remove the shingles around the opening measured
and cut out this section.
STEP 5:
Add the next sections of the pipe until the end
penetrates the roofline. Check to see that the proper
clearances are maintained. Extend chimney by adding
sections of double wall pipe until pipe is a minimum of 30
inches above the highest point of the roof cutout. Termination
and chimney must extend a minimum of 36 inches above the
highest point where it passes through roof.
FLASHING INSTALLATION
(V6F-10DM or V12F-10DM)
FLASHING INSTALLATION
(V6F-10DM or V12F-10DM)
Determine the flashing to be used with the roof opening chart.
Slide flashing over pipe until base is flat against roof. Replace
as many shingles as needed to cover exposed area and flashing
base. Secure in position by nailing through shingles (see
figure 12).
DO NOT NAIL THROUGH FLASHING CONE.
INSTALLING FLASHING ON A METAL ROOF
When installing the flashing on a metal roof, it is required that
putty tape be used between the flashing and the roof. The
flashing must be secured to the roof using #8 x ¾” screws and
then sealed with roof coating to prevent leakage through the
screw holes. A roof coating must also be applied around the
perimeter of the flashing to provide a proper seal
.
STORM COLLAR INSTALLATION (SC2-1)
Place storm collar over pipe and slide down until it is snug
against the open edge of the flashing (see figure 13). Apply
waterproof caulk around the perimeter of the collar to provide
a proper seal.
TERMINATIONS / SPARK ARRESTOR
The fireplace system must be terminated with the listed round
top or chase terminations. In any case, refer to the installation
instructions supplied with the termination.
Figure 12 FLASHING INSTALLATION
Figure 13 STORM COLLAR
Figure 11 ROOF OPENING CHART – GM36
(degrees)
(inches)
MODEL NO.
FLAT
0
17
V6F-10DM
0 - 6/12
26.6
19
V6F-10DM
6/12 - 12/12
45.0
24
V12F-10DM
PITCH
SLOPE
OPENING "A" MAX
USE FLASHING
(degrees)
(inches)
MODEL NO.
FLAT
0
19.5
V6F-10DM
0 - 6/12
26.6
22
V6F-10DM
6/12 - 12/12
45.0
27
V12F-10DM
Figure 11B ROOF OPENING CHART – GM42/50
