Hearth and Home Technologies MONTANA 42 EN - Manual (Page 19)

Outdoor Lifestyles by Hearth & Home Technologies Inc. • Montana US-CAN • 4039-156 Rev P• 10/12 19
Termination Cap
Storm Collar
Slope Downward
Turn-down
Drip Edge
Chase
(Chimney)
2 in. (51 mm) Collar
on Chase Top
Caulk
.018 (26 ga) min.
Galvanized
Chase Top
Figure 6.3 Chase Top Construction
B. Chase Top
A metal chase top is required to seal the top of the chase
around the chimney pipe. The top should include a turn-
down and drip edge to prevent water from seeping into the
chase. Provide a 1/8 in. (3 mm) gap around the flue pipe
and slope the top downward away from the penetration. See
Figure 6.3.
• All seams must be caulked to prevent leaks.
• A chase installation must use a chase top. Chase tops
are available from your Hearth & Home dealer or may be
field constructed.
• Attach the chase top to the top of the chase.
Figure 6.2 Ceiling/Attic Construction
Fire Risk
• Must maintain 2 in. (51 mm) air clearance
to insulation and other combustible
materials.
WARNING
Mark the Exit Point of the Roof
Locate the point where the chimney will exit the roof by plumbing down to the
center of the chimney. Drive a nail up through the roof to mark the center. See
Figure 6.2.
Cut Out the Hole in the Roof
Measure to either side of the nail and mark the 14-1/2 in. x 14-1/2 in.
(368 mm x 368 mm) opening required. This is measured on the horizontal;
actual length may be larger depending on the pitch of the roof. Cut out and
frame the opening. See Chapter 25 of the Uniform Building Code for roof
framing details.
Assemble the Chimney Sections Through the Roof
Continue to add chimney sections through the roof opening, maintaining at
least a 2 in. (51 mm) air space to combustible materials.
Install the Roof Flashing
If a roof flashing is to be used, install the roof flashing appropriate to the
roof pitch and install a round termination cap and storm collar following the
instructions shipped with the cap.