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Offset
Elbow
6' Max.
Return
Elbow
6' Max.
Offset
Elbow
FIRESTOP SPACERS (1100EFS-10DM)
Firestop spacers are required at each point
where chimney penetrates a floor space.
Their purpose is to establish and maintain
required clearance between chimney and
combustible materials. When pipe passes
through a framed opening into a living space
above, firestop must be placed onto ceiling
from below as shown in Figure 10.
They also provide complete separation from
one floor space to another or attic space as
required by most codes. When double wall
pipe passes through a framed opening into
an attic space, firestop must be placed into
attic floor as shown in Figure 11.
Figure 10 - Firestop Spacer with Living
Space Above Ceiling
8
VenTing insTallaTion
Continued
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Elbow
Offset
Elbow
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Elbow
A
Figure 9 - Typical Offset Terminations
Existing
Ceiling
Frame
Firestop
Spacer
Screws or
Staples
(Min. of 8)
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Return
Elbow
6' Max.
Ceiling
Support Pipe
12S-12DM
Offset
Elbow
6' Max.
B
Firestop
Spacer
Figure 11 - Firestop Spacer with Attic
Space Above Ceiling
PENETRATING THE ROOF
To maintain a 1" clearance to the pipe on a
roof with a pitch, a rectangular opening must
be cut.
1. Determine the center point through which
pipe will penetrate the roof.
2. Determine center point of the roof. Pitch
is the distance the roof drops over a given
span, usually 12". A 6/12 pitch means the
roof drops 6" for each 12" one measure
horizontally down from roof rafters.
3. Use roof opening chart (Figure 12, page
9) to determine correct opening length and
flashing required.
4. Remove shingles around opening mea-
sured. Cut out this section.
Return
Elbow
6' Max.
6' Max.
C
Screws or Staples
(Min. of 8)
Existing
Ceiling
Frame
116010-01E
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