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Quadra-Fire • QFP38 Series • 4061-300 Rev i • 9/0938
3 fasteners
per side
Ceiling firestop
installed below ceiling.
Ceiling firestop
installed above ceiling.
Install attic insula-
tion shields before
or after installation
of vent system.
Attic Above
10 in. (254 mm)
Hole should measure
10 in. x 10 in.
(254 mm x 254 mm)
inside to inside
10 in.
(254 mm)
C. Install the Ceiling Firestop
A ceiling fi restop MUST be used between
fl oors and attics.
• Frame an opening 10 in. by 10 in. (254 mm
by 254 mm) whenever the vent penetrates
a ceiling/fl oor (see Figure 8.4).
• Frame the area with the same sized lumber
as used in ceiling/fl oor joist.
• The ceiling fi restop may be installed above
or below the ceiling joists when installed
with a attic insulation shield. It must be
under joists between fl oors that are not
insulated. Refer to Figure 8.5.
• 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 8.4 Installing Ceiling Firestop
Figure 8.5 Installing the Attic Shield