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I. 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 fi t, 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:
• Remove any insulation from attic fl oor around the framed
opening.
• Assemble Chimney Sections until at least 18 inches of
chimney extends above the Firestop.
• Slip the Attic Insulation Shield over the chimney until the
base sits squarely on the framed opening (Figure 8.8).
• 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
in. wood screws per side (Figure 8.9).
• 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 (Figure 8.9).
Attic
Insulation
Shield
Firestop
Attic
Figure 8.8
Attic
Attic Shield
Collar
Firestop
Figure 8.9
J. 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 com-
bustibles 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 (Figure 8.10). Depending on the
pitch of your roof, trim the Roof Radiation Shields with tin
snips so they provide coverage of the roof framing ex-
posed to the chimney. Secure the Roof Radiation Shields
to the top of the framing members using at least (3) nails or
screws for each shield (Figure 8.10).
Chase
Enclosure
Roof
Radiation
Shield
Figure 8.10
Heat & Glo • RUTHERFORD-50 • 4059-333 Rev C • 06/08