F. Cut out Hole in Roof
• Refer to Figure 8.6.
•
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.
G. Complete Installation
WARNING! Risk of Fire!
(51 mm) air space to insulation and other combustible ma-
terials around the chimney system. Failure to do so could
cause overheating and fire.
•
Keep chimney sections from separating or twisting.
•
You may secure straight chimney sections at the joints
with screws no longer than 1/2 in. (13 mm).
The following steps should be skipped if using a
chase.
• Install roof flashing appropriate to roof pitch.
•
Install round termination cap and storm collar.
H. 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.
Outdoor Lifestyles by Hearth & Home Technologies • ODVILLA Wood Owners/Install • 4072-345 Rev A • 08/22
You MUST maintain 2 in.
Figure 8.9
Ceiling/Attic Construction
27