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
or chase 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. Install roof radiation
Shields at either the top of the chase or where
the chimney penetrates the roof, whichever
is the top of the installation. roof radiation
Shields are built with a 1/2" air gap standoff from
the joist face (Fig. 11). The corners of the roof
radiation Shields overlap each other to ensure
proper position. Secure the roof radiation
Shields to the top of the framing members
using screws or nails in the corners (Fig. 11).
If framing members are further away from the
chimney than 2", center the roof radiation
Shield to the chimney on the framing member
and secure in place with screws or nails.
12. Attach Flashing: For chase
enclosures, use a Chase Top Flashing.
The Chase Top Flashing allows for a 1-1/2”
clearance maintained from the chimney
and provides required ventilation air. Install
the Chase Top Flashing at the top of the
chase with a ½” minimum air clearance
off the top of the chase construction (Fig. 12,
13). Use spacing clips provided to establish
½” air clearance. If the Chase Top Flashing
does not fit the dimensions of the chase, use
a Chase Top Collar Section and extend the
base of the flashing as needed for the chase
dimensions. ensure the minimum ½” spacing
and perimeter ventilation requirements are
met as show in Figure 12. Secure the Chase
Figure 13
1 1/2” VENTILATION OPENING
AROUND CHIMNEY PIPE
MINIMUM
1/2 INCH
AIR SPACE
1/2 INCH
ESTABLISHED
BY SPACERS
AIR SPACE
1/2"
CHASE TOP
FLASHING
REQUIRED
SPACERS
Figure 12
Figure 11
(4) ROOF
RADIATION
SHIELDS
CHASE
ENCLOSURE
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