Filter
Top Products
28
ROOM ABOVE (non-insulated ceiling)
ATTIC ABOVE (insulated ceiling)
B
A
Ceilng firestop from
bottom
Ceiling firestop from
top
Note: Use same dimensional lumber for framing
ceiling firestop and joists.
Figure 8.5 Installing the Ceiling Firestop
• Install a ceiling restop whenever chimney penetrates
ceiling/oor.
• Mark and cut an opening in ceiling as shown in
Figure 8.5.
• Frame the opening with the same size lumber used in the
ceiling joists.
• Nail the ceiling restop to the bottom of the ceiling joists
when there is a room above/
• Use an attic insulation shield if the ceiling is insulated. The
ceiling restop may then be attached above or below the
joists. Refer to Figure 8.6 and 8.7.
D. Install Ceiling Firestops
CAUTION! Risk of Fire! Ceiling restops must be used
whenever the chimney penetrates a ceiling/oor.
• Chase construction requires ceiling restops at each oor
or every 10 ft (3.05 m) of clear space.
• The ceiling restop slows spread of re and reduces cold
air inltration.
WARNING! Risk of Fire! DO NOT seal area between
restop opening and chimney pipe except where they
enter the attic or leave the warm-air envelope of the
home (use 600° F sealant).
Heatilator • Birmingham BIR42-B • 4059-681 • 11/11
Catalog #
A B
in. mm in. mm
FS538 17 432 17 432
FS540 17 432 26 660