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Step 6
Attic Insulation Shielding: The purpose of Attic Insulation Shielding is to maintain the required 2-inch
air space clearance from debris, electrical wiring and insulation when the chimney passes into an attic. This
vital step can be accomplished with three different methods:
Option 1 –
Use this method when a Square (See note below) has been installed in the ceiling below the attic
floor. If the cathedral ceiling support extends 10 inches or more above the attic floor, this provides the
necessary attic insulation shielding. Once the chimney sections are in place, a square storm collar will be fitted
around a chimney section. Slide the storm collar down to fit against the cathedral ceiling support. This prevents
debris from entering the cavity between the chimney and the cathedral ceiling support.
If the cathedral ceiling support does not extend 10 inches or more above the attic floor, trim the square ceiling
support to be flush with the attic floor. Next, follow the instructions in Option 1 above.
NOTE:
When using a Square Ceiling Support that extends into an open attic space, it is necessary to install an
Attic Insulation Shield directly on top of the Support Box, securing it with four #8 X ½” self-tapping screws.
Then, slide the storm collar down to fit against the Attic Insulation Shield. This prevents debris from entering
the cavity between the chimney and the Attic Insulation Shield and Square Ceiling Support Box.
Step 7
–
Assemble the Chimney:
Secure a universal adapter to the first chimney section. Slide the first chimney section, female end down, into
the ceiling support assembly being used. Continue installing the sections upwards using a minimum of four, #8
X ½” self drilling screws per joint. Never use over-length screws that could penetrate the inner lining of the
chimney. The final chimney height should be determined using the specifications found on Page 3 under the
heading “Termination Above Roof.”
Attic shielding enclosures
:
In certain attic scenarios, typically low attic
installations, where the Attic Insulation Shield
will not fit, you must enclose the attic portion
of the chimney in a framed enclosure. The
chimney within the enclosure must maintain
the
required 2 inch air space to combustibles.
