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 6.
5
Figure 6. 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.
4.2 Metal Chimney
Install a Stone Age masonry pipe adapter No. 235
(sold separately). Attach a 16” metal chimney pipe
to the adapter. Connect the first section to the top of
the firebox as shown in Figure 7. Chimney plumb-
ing 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 7. Connect Chimney
A. When the chimney passes through a ceiling to
an upper floor, make sure the 2-inch clearance is
maintained with framing where it passes through
the ceiling.
B. Complete chimney installation as shown in
Figure 8. As the chimney extends through the at-
tic to the roof, attach securing straps to rafters and
joists as required to provide stability.
23
C. As the chimney rises through the ceiling, per-
haps a second floor, and through the attic and
roof, 16 inches is the maximum offset allowed,
and only one offset is permitted.
D. Locate the point where the chimney will exit
the roof by plumbing down to the center of the
chimney. Drive a nail into the roof to mark the cen-
ter.
E. 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 8.
