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107777-01E10
VENTING INSTALLATION
Continued
Pitch Slope Opening
Flat 0° 15" V6F-8DM
0-6/12 26.6° 16
1
/
8
" V6F-8DM
6/12- 12/12 45.0° 20
3
/
8
" V12F-8DM
4. Remove shingles around opening mea-
sured. Cut out this section.
5. Add next sections of pipe until end
penetrates roof line. Check to see that
proper clearances are maintained. Extend
chimney by adding sections of double wall
pipe until pipe is minimum of 30" above
highest point of roof cutout. Termination
and chimney must extend a minimum of
36" above highest point where it passes
through roof.
Figure 14 - Roof Opening Measurements
Determine ashing to be used with roof open-
ing chart. Slide ashing over pipe until base is
at against roof. Replace as many shingles as
needed to cover exposed area and ashing
base. Secure in position by nailing through
shingles (see Figure 15, page 11). DO NOT
NAIL THROUGH FLASHING CONE.
When installing ashing on a metal roof, it
is required that putty tape be used between
ashing and roof. Flashing must be secured
to roof using #8 x 3/4" screws and then sealed
with roof coating to prevent leakage through
screw holes. A roof coating must also be ap-
plied around perimeter of ashing to provide
a proper seal.
Firestop spacers are required at each point
where chimney penetrates a floor space.
Their purpose is to establish and maintain
required clearance between chimney and
combustible materials. When pipe passes
through a framed opening into a living space
above, restop must be placed onto ceiling
from below as shown in Figure 12.
They also provide complete separation from
one oor space to another or attic space as
required by most codes. When double wall
pipe passes through a framed opening into
an attic space, restop must be placed into
an attic oor as shown in Figure 13.
To maintain a 1" clearance to pipe on a roof with
a pitch, a rectangular opening must be cut.
1. Determine center point where pipe will
penetrate roof.
2. Determine center point of roof. Pitch is
the distance the roof drops over a given
span, usually 12". A 6/12 pitch means that
the roof drops 6" for each 12" measure
horizontally down from roof rafters.
3. Use roof opening chart (Figure 14, page
10) to determine correct opening length
and ashing required.
Figure 12 - Firestop Spacer with Living
Space Above Ceiling
Figure 13 - Firestop Spacer with Attic
Space Above Ceiling
If area above is a living space, install
restop below framed hole.
If area above is an attic or insulated area,
install restop above framed hole.
14
3
/
8
"
(36.5 cm)
30"
(76.2 cm)
1"
(2.5
cm)
1"
(2.5
cm)
Minimum Measurements
1"
(2.5 cm)
Opening "A"