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
WARNING
Fire Risk
•Must maintain 2 in. (51 mm) air clearance to insulation and other combustible materials.
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 |
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If a roof flashing is to be used, install the roof flashing appropriate to the |
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roof pitch and install a round termination cap and storm collar following the |
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instructions shipped with the cap. | Figure 6.2 Ceiling/Attic 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.
Caulk
Figure 6.3 Chase Top Construction
Termination Cap
2 in. (51 mm) Collar on Chase Top
Storm Collar Slope Downward
Drip Edge
Chase (Chimney)
.018 (26 ga) min. Galvanized Chase Top
Outdoor Lifestyles by Hearth & Home Technologies Inc. • Montana | 19 |