Install Ceiling Firestops - Heat & Glo HST-48D Owner's Manual

E. Install Ceiling Firestops
CAUTION! Risk of Fire! Ceiling firestops must be used
whenever the chimney penetrates a ceiling/floor.
• Chase construction requires ceiling firestops at each
floor or every 10 ft (3.05 m) of clear space.
• The ceiling firestop slows spread of fire and reduces cold
air infiltration.
• Install a ceiling firestop whenever chimney penetrates
ceiling/floor.
• 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 firestop 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 firestop may then be attached above or below
the joists.
WARNING! Risk of Fire! DO NOT seal area between
firestop opening and chimney pipe except where they
enter the attic or leave the warm air envelope of the
home (use 600° F sealant).
28
Heat & Glo • HST-48D US-CAN • 4012-040 • Rev K • 3/12
ROOM ABOVE (non-insulated ceiling)
B
Ceilng firestop from
bottom
ATTIC ABOVE (insulated ceiling)
Ceiling firestop from
top
Note:
Use same dimensional lumber for framing
ceiling firestop and joists.
Catalog # in.
FS538 17
FS540 17
Figure 8.5 Installing the Ceiling Firestop
A
A B
mm in. mm
432 17 432
432 26 660