Installation Guide
10
8. Install Attic Insulation Shield: The 
Attic Insulation Shield is required where the 
chimney passes into an attic. Its purpose is 
to prevent debris and insulation from getting 
too close to the chimney (Fig 10). An installed 
Attic Insulation Shield is 15 inches high. In 
attic areas where this shield cannot t, 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. If the chimney passes 
into the attic, install the Attic Insulation Shield 
as follows: 
a.  If the Firestop Radiation Shield extends 
above the attic oor, no modications are 
necessary. The Firestop Radiation Shield will 
t inside the Attic Insulation Shield. 
b. Assemble Chimney Sections until at least 
18 inches of chimney extends above the 
Firestop Radiation Shield.
c. Extend the Firestop Radiation Shield tube 
extension (keep at least 1” overlap), and 
secure in place using sheet metal screws.
d. Slip the Attic Insulation Shield over the 
Chimney and Firestop Radiation Shield until 
the base sits squarely on the framed opening 
(Fig 7 & 10).
e. Secure the Attic Insulation Shield to the 
top of the framed opening using at least (3) 
8-penny nails or (3) #8, 1-1/2” wood screws 
per side (Fig 10). 
f. 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. Slip the tab through the adjacent slot 
and fold it back to tighten and secure the 
Collar (Fig 11). 
9. Attach Flashing: In new construction, 
assemble the Chimney Sections to a point 
above the roof, then slip the Flashing over 
the chimney. On an existing roof, center 
and install the Flashing before extending the 
Figure 11
Figure 12
Figure 13
ROOFING 
FASTENERS
ADJUSTABLE 
FLASHING
PUSH COLLAR 
DOWN TO 
FLASHING AND 
SEAL WITH NON-
HARDENING HIGH-
TEMP SILICONE 
SEALANT
7. Assemble Chimney Sections: Lower 
the female end of the rst Chimney Section 
in the Support Box (Fig 9). It will twist-lock 
clockwise onto the male end of the Support 
Box. Turn Pipe Sections rmly clockwise to 
lock them together. Sheet metal screws are 
not required, but they may be used to reinforce 
the connection, if desired. Use only 1/2” (or 
shorter) sheet metal screws. Do not penetrate 
the inner liner of the chimney. 










