6
F. Measure to all sides of the nail and mark the
required opening, then cut a hole in the roof. Re-
member that the hole is measured on the horizon-
tal, then projected to the roof. The hole may then
be larger, depending on the pitch of the roof. See
Figure 7.
Figure 7. Roof Penetration
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. Install the top cap following instructions pro-
vided. This will protect the chimney from rain,
birds, animals and leaves.
Figure 8. Install Top Cap
4.2 Metal Chimney
Install the metal chimney following the instructions
below and the instructions provided by the chim-
ney pipe manufacturer.
Install a Stone Age masonry pipe adapter No. 235
(sold separately). Attach a 14” or 16” metal chim-
ney pipe to the adapter. Connect the first section to
the top of the firebox as shown in Figure 9. Chim-
ney 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.
Figure 9. Connect Chimney
A. When the chimney passes through a ceiling to
an upper floor, make sure the chimney pipe manu-
facturers recommended clearances to combusti-
bles 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 off-
set allowed, and only one offset is permitted.
D.If chimney exit opening does not already ex-
ist,locate the point where the chimney will exit the
roof by plumbing down to the center of the chim-
ney. Drive a nail into the roof to mark the center.
E. Measure to all sides of the nail and mark the
required opening, then cut a hole in the roof. Re-
