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R
CHIMNEY REqUIREMENTS
A chimney must be the required height above the roof
or other obstruction for safety and for proper draft oper-
ation. The requirement is that the chimney must be at
least feet (91cm) higher than the highest point where
it passes through the roof, and at least 2 feet (61cm)
higher than the highest part of the roof or structure that
is within10 feet (05cm) of the chimney, measured hori-
zontally. Refer to Figure 8C.
Figure 8A
Non-Combustible
Firestopping
Material
2 inch
(51mm)
Floor
(second Story)
Figure 8B
Minimum 2 inch (51mm) clearance
from combustible material
and insulation
ceiling
Page 8
4100-I ACT WOOD INSERT
Firestopping
Floor
Ceiling
Caulk
Minimum 1 inch (25mm)
clearance from exterior
chimney to sheathing
Non-combustible
fire stopping material
OVALIZING ROUND STAINLESS STEEL
Ovalizing round stainless steel liners to accommodate
the liner passing through the damper region of a fire-
place is an allowable and acceptable practice.
Ensure that the ovalization is minimized to the extent
required to fit through the damper.
Figure 8C
CHIMNEY HEIGHT
At least ft
(91cm)
Figure 8D
CHIMNEY TOp VIEW
1/2" (12.7mm) airspace
Foundation
250-7201E
LINERS
10 ft
(05cm)
At least 2 ft
(61cm)
5/8" (16mm)
Fireclay Flue
Liner
FLUE
Chimney Wall
4" (102mm)
Nominal
September 1, 2008
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