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G. Roof Penetration
• Refer to Figure 6.10.
• Plumb from roof to center of chimney.
• Drive a nail up through roof to mark center of pipe.
• Measure to either side of nail and mark the 14-1/2 in. x
14-1/2 in. (368 mm x 368 mm) opening required.
• Measure opening on the horizontal; actual length may
be larger depending on roof pitch.
• Cut out and frame opening.
Figure 6.11 Ceiling/Attic Construction
Install Flashing
• Assemble chimney so it passes through the framed
opening.
• Slip the flashing over the chimney.
NOTICE:
Roofing shingles must be below the flashing
plate on the lower side of a sloped roof and over the
flashing plate on the sides and top.
• Nail the flashing to the roof. Keep gaps between the
flashing plate and the roof to a minimum.
• Caulk the flashing plate and roof junction as well as
the vertical seam on the flashing. All nail heads must
be caulked with a roofing sealant.
• Caulk the overlap seam of any exposed pipe sections
that are located above the roof line to prevent leaks.
CHIMNEY
FLASHING
PLATE
JOISTS
NAIL
THIMBLE
FLASHING
Figure 6.12 Installing Part: 12966A, Configuration 1
NOTICE:
REQUIRED
for manufactured homes.
• Locate the point where the chimney will exit the roof by
plumbing down to the center of the chimney. Lay out,
cut and frame a 14-1/2 in. (368 mm) square opening
(measured on the horizontal) through the ceiling and roof
structure.
Consult local codes for framing details.
H. Manufactured Home Installation
SL-300 Series Ceiling/Roof Thimble
• Center the flashing over the chimney and nail it to the
roof. Keep gaps between the flashing plate and the roof
to a minimum. Caulk the flashing plate and roof junction
as well as the vertical seam on the flashing. All nail heads
must be caulked with a roofing sealant.
•
Finish assembling the chimney storm collar and
termination cap following the installation instructions
provided with them.
• The thimble must extend completely through the roof
structure shielding combustible materials. Five location
holes have been provided to allow for a variety of ceiling/
roof thicknesses. A thimble extension is required when
the ceiling/roof thickness exceeds 12-1/2 in. (318 mm).
The extension should overlap the thimble one inch.
• To attach the extension to the thimble, drill 1/8 in. (3 mm)
holes through the outer shield of the thimble using the
predrilled holes in the extension as guides. Attach the
extension to the thimble using the screws provided with
the extension.
• Install the thimble assembly and nail it securely to the
framing members.
Termination Cap
Additional
support for
tall chimneys
Storm Collar
Maintain minimum
clearances to
combustibles as
specified
Chimney must extend
beyond combustible
roof structure
Maintain minimum
height of chimney
above roof
Install roof flashing
according to minimum
requirements
Figure 6.10 Install Flashing
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Quadra-Fire • PIONEER - III • 4182-901 Installation Manual • Rev C • 07/19