BUILDER'S CHOICE SERIES INSTALLATION INSTRUCTIONS
c.Firestop Spacer/Chimney Installation
Frame an opening and install an FS6 Firestop Spacer whenever the vent penetrates a ceiling/ floor area, as shown in Figure 16. Frame the opening with the same sized lumber as used in the ceiling/floor joists. Do not pack insulation around the chimney.
Figure 16
Installing the Firestop Spacer
Roof Pitch | H (Min.) Ft. |
Flat to 6/12 | 1.0 |
6/12 to 7/12 | 1.25 |
Over 7/12 to 8/12 | 1.5 |
Over 8/12 to 9/12 | 2.0 |
Over 9/12 to 10/12 | 2.5 |
Over 10/12 to 11/12 | 3.25 |
Over 11/12 to 12/12 | 4.0 |
Over 12/12 to 14/12 | 5.0 |
Over 14/12 to 16/12 | 6.0 |
Over 16/12 to 18/12 | 7.0 |
Over 18/12 to 20/12 | 7.5 |
Over 20/12 to 21/12 | 8.0 |
Table 1
Chimney Height
d.Chase/Termination Installation
Figures 17 and 18, and Table 1 specify minimum chimney heights for various pitched roofs.
These chimney heights are necessary for safety and do not ensure draft-free operation. Trees, buildings, adjoining roof lines, adverse conditions, etc. may create a need for a taller chimney should down drafting occur.
Figure 17
Chimney Height for Vertical Termination
Figure 18
Multiple Vertical Termination Clearances
Note: To ensure proper operation, verify all venting and the termination are unobstructed.
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