8
support, due to the weight of the flue system. Con-
sult with an engineer to determine the best way to
do so for your project.
E. If chimney exit opening does not already exist
locate the point where the chimney will exit the
roof by plumbing down to the center of the fire-
place chimney. Drive a nail into the roof to mark
the center.
F. Measure to all sides of the nail and mark the
required opening, and then cut a hole in the roof.
Remember that the hole is measured on the hori-
zontal, and then projected to the roof. The hole
may then be larger, depending on the pitch of the
roof. See Figure 22.
G. Frame the opening in the roof.
H. Continue to add flue sections, extending the
chimney through the roof.
I. Install roof flashing appropriate to the roof
pitch.
J. Use mortar to create a slope away from the clay
flue, running out to the edge of the finish material,
to assist with water drainage. Install the chimney
cap following instructions provided. This will pro-
tect the chimney from rain, birds, animals and
leaves. See Figure 23.
4.2 Metal Chimney
Install the metal chimney following the instructions
below and the instructions provided by the chimney
pipe manufacturer.
Install a Stone Age masonry pipe adapter (sold sepa-
rately) to the top of the firebox, using a 16” I.D.
adapter for the NA 48. Connect the first pipe section
to the metal adapter as shown in Figure 24. Chimney
plumbing can either be straight through the ceiling
and through the roof, or if the fireplace is installed on
an outside wall, the chimney can be external to the
house. Affix warning labels to the pipe. See Figure
24.
A. When the chimney passes through a ceiling to
an upper floor, ensure the chimney pipe manufac-
turers recommended clearances to combustibles is
maintained with framing where it passes
through
the ceiling.
B. Complete chimney installation as shown in
Figure 10. As the chimney extends through the
attic to the roof, attach securing straps to rafters and
joists as required to provide stability.
C. As the chimney rises through the ceiling, per-
haps a second floor, and through the attic and roof,
16 inches or 30 degrees is the maximum offset al-
lowed, and only one offset is permitted.
Pipe
Adapter
Chimney
Pipe
Figure 23. Install Chimney Cap
Figure 22. Roof Penetration
Figure 24. Connect Chimney
Warning
Label
Summary of Contents for NA48
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