FireRock 3620 Avenue C, Product Manual

Page: 108 / 124

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legs to nearby framing using plumber’s tape
or guy-wires (Fig. 8). note: the Stabilizer does
not support the weight of the chimney, it is only
used to keep chimney centered within a chase.
10. Install Attic Insulation Shield: The Attic
Insulation Shield must be installed where the
chimney passes into an attic. Its purpose is
to prevent debris and insulation from getting
too close to the chimney. In attic areas where
this shield cannot fit, or is not used you must
enclose the attic portion of the chimney in
a framed enclosure. If the chimney is fully
enclosed through the attic, an Attic Insulation
Shield is not required. Install the Attic
Insulation Shield as follows:
a. Remove any insulation from attic floor
around the framed opening.
b. Assemble Chimney Sections until at least 18
inches of chimney extends above the Firestop.
c. Slip the Attic Insulation Shield over the
Chimney until the base sits squarely on the
framed opening (Fig. 9).
d. Secure the Attic Insulation Shield to the
top of the framed opening using at least (2)
8-penny nails or (2) #8, 1-1/2" wood screws
per side (Fig. 10).
e. Wrap the Collar of the Attic Insulation Shield
around the chimney and fasten it loosely. Slide
the Collar down to meet the Attic Insulation
Shield. Tighten the bolts to secure the Collar
in place (Fig. 10).
11. Install Roof Radiation Shields: roof
radiation Shields provide protection for roof
framing members. note: roof radiation
Shields do not allow for a reduced clearance to
combustibles. Clearance to combustibles must
be a minimum of 2" away from the chimney
pipe. When you penetrate through the roof,
roof radiation Shields must be installed with
a 1/2" air gap between the shields and the
joist face (Fig. 11). Depending upon the pitch
of your roof, trim the roof radiation Shields
with tin snips so they provide coverage of the
Figure 9
FIRESTOP
INSULATION
SHIELD
ATTIC
ATTIC
Figure 10
ATTIC SHIELD
ATTIC
COLLAR
FIRESTOP
Figure 11
ROOF
RADIATION
SHIELD
CHASE
ENCLOSURE
Figure 12
1/2 INCH
AIR SPACE
1/2 INCH
ESTABLISHED
BY SPACERS
AIR SPACE
1/2
BY DURA-VENT)
CHASE TOP
FLASHING
(NOT FURNISHED
FABRICATED
SPACERS LOCALLY
107