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C. Install the Ceiling Firestop
A ceiling firestop MUST be used between
floors and attics.
• SLP pipe only - Frame opening 9 in. x 9
in. (22,9 cm x 22,9 cm) whenever the vent
penetrates a ceiling/floor (see Figure 8.3).
• Frame the area with the same sized lumber
as used in ceiling/floor joist.
• The ceiling firestop may be installed above or
below the ceiling joists when installed with a
attic insulation shield. It must be under joists
between floors that are not insulated. Refer
to Figure 8.4.
• Secure with three fasteners on each side.
WARNING! Risk of Fire! DO NOT pack insu-
lation around the vent. Insulation must be kept
back from the pipe to prevent overheating.
Figure 8.3 Installing Ceiling Firestop
CEILING FIRESTOP
INSTALLED BELOW CEILING
Figure 8.4 Installing the Attic Shield
Heat & Glo • 350TSI-P-CEM • 2033-973 Rev. G • 4/17
PIPE
DVP
SLP
INSTALL ATTIC INSULATION SHIELDS
BEFORE OR AFTER INSTALLATION OF VENT SYSTEM
3 FASTENERS
PER SIDE
ATTIC ABOVE
A
A
A
10 in. (25,4 cm)
9 in. (22,9 cm)
CEILING FIRESTOP
INSTALLED ABOVE CEILING
35
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