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PENETRATING THE ROOF
To maintain a 2-inch 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 pitch 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 measured horizontally.
STEP 3: From the center point determined in STEP 1, measure an
opening 17
1
/
inches wide (8
5
/
4
For a roof pitch between 0/12 (Flat) and 6/12 measure an opening 21
inches long (10
1
/
inches above and below the center point).
2
6/12 to 12/12 pitches: Measure 26 inches (13 above and below).
12/12 to 18/12 pitches: Measure 32
18/12 to 24/12 pitches: Measure 40 inches (20 above and below).
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
roof line. Check to see that proper clearances are maintained.
Extend chimney by adding sections of double wall pipe until pipe is
a minimum of 30 inches above highest point of roof cutout.
Termination and chimney must extend a minimum of 36 inches
above highest point where it passes through the roof.
10 FOOT RULE
f i r e - p a r t s . c o m
All chimney terminations must extend a minimum of 3 feet in height
above the highest point where it passes through the roof and must be
at least 2 feet above the peak of the roof if within a horizontal distance
of 10 feet from the peak (see Figure 10).
10'
OR LESS
2' MIN.
10 FOOT RULE
Figure 10
55510
inches to each side of the center point).
8
1
1
/
inches (16
/
above and below).
2
4
LEVEL OF FLUE
GAS OUTLET
10'
3' MIN.
2' MIN.
3' MIN.
TERMINATIONS
The fireplace and chimney system must be vented to the out-of-doors
and must be terminated with the listed round top or chase termina-
tions. If a chase termination is desired, refer to the instructions
supplied with the termination.
WARNING: DO NOT SEAL VENTILATION OPENINGS
ON THE ROOFTOP FLASHING. FOLLOW THE IN-
STALLATION INSTRUCTIONS PROVIDED WITH THE
TERMINATION BEING USED.
FOR ROUND TOP TERMINATION ON ROOF
STEP 1: Slide the flashing over the pipe (no firestop is needed at the
roof level). Tack the flashing down at the top two corners with roofing
nails. Lay tile over the top and sides of the flashing and secure them
to the roof through the flashing with the roof nails. Place roofing under
the lower edge and secure to the roof. Cover all nail heads with
mastic or roof cement.
STEP 2: Install storm collar on double wall chimney, push collar down to
flashing and seal (see Figure 11).
STEP 3: Place the VRTL-8DM on to the pipe end as illustrated and
secure with screws provided.
IMPORTANT: If an exposed portion of chimney is greater than 5
feet above the roof line, use support wires to keep chimney secure.
The support wires may be attached to the outer pipe of the chimney
with screws, provided the screws are no longer than 3/4".
ATTACH BRACKET
TABS TO OUTER
PIPE (3 PLACES)
SECURE WITH
SCREWS
OVERLAP
SHINGLES
TOP AND SIDES
Figure 11
5
VRTL-8DM
FLUE PIPE OF VRTL-8DM
INSIDE INNER PIPE OF
CHIMNEY
CAULK
COLLAR
FLASHING
UNDERLAP SHINGLES
BOTTOM ONLY
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