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WARNING! Risk of Fire!
You MUST maintain 2 in.
(51 mm) air space to insulation and other combustible
materials around the chimney system. Failure to do so
could cause overheating and fire.
The following steps should be skipped if using a
chase.
• Install roof flashing appropriate to roof pitch.
• Install round termination cap and storm collar.
• 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.
Figure 8.12 Ceiling/Attic Construction
• Refer to Figure 8.11.
• 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.
• Refer to
Chapter 25
of the
Uniform Building Code
for
roof framing details.
Continue assembling the chimney sections up through the
ceiling firestops as needed. While doing so, be aware of the
height and unsupported chimney length limitations given un-
der Section 8.A. Chimney Requirements.
Check each section by pulling up slightly from the top to en-
sure proper engagement before installing the succeeding
sections. If they have been connected correctly, they will not
disengage when tested.
I. Double-check the Chimney Assembly
J. Cut out Hole in Roof
K. Complete Installation
WARNING! Risk of Fire!
Secure offsets with screws (not to exceed 1/2in./13mm
in length).
Secure returns with strapping.
Straight chinney sections may be secured with screw
(not to exceed 1/2in./13mm in length) at the joints
Keep chimney sections from separating or twisting.
L. Install Flashing
Ceiling
Firestop
Straps
Optional
Additional
Support
Joint
Band
(Optional)
Figure 8.11 Secure the Chimney
• 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.