Installation Instructions

10
RAFTER RADIATION SHIELD:
A Rafter Radiation Shield (RRS) must be installed where the chimney is
enclosed immediately below the roof line as shown in
figure 18. An example of this is when the attic space of a house is being
used as living space (ie. bedroom, guestroom etc.). It must also be
installed when height restrictions will not allow the use of the Attic
Insulation Shield (AIS) and the chimney has been enclosed with an
enclosure around the chimney.
Attach the support brackets to the shield (through one of the three pre-
punched holes) such that once the shield is installed, the shield
protects both the upper and lower parts of the roof joist framing (See
figures 15 & 19).
Rafter Radiation Shield Assembly
FIGURE 15
Shield
Bracket
Screw
FIGURE 16
Roof Support Assembly
Nut
Lock Washer
Support Band
Carriage Bolt
Support
Bracket
Install additional chimney sections and lock together by turning clock-
wise until the two sections lock together snugly. Continue in this
manner until the required height above the roof is achieved.
NOTE: Unlike normal inside installation, a cathedral ceiling installation
provides only one support point for the chimney. This limited support
can allow the chimney to sway slightly or vibrate in high winds
conditions. It is advisable to install additional lateral support such as
the use of a Roof Support or a Roof Guy Kit.
Chimney sections (15 feet max.) installed below the Cathedral Ceiling
Support are locked together from below by turning clockwise until
snugly locked together with each joint being secured by a Locking Band.
These lengths can be painted to match the connector pipe with a high
temperature heat resistant paint. To improve adhesion to the chimney,
degrease, clean, prime before painting. Follow the paint manufacturer's
instructions.
Cathedral Ceiling Support InstallationFIGURE 14
ROOF SUPPORT
The Roof Support may be used on a floor, ceiling or roof and adjusts
to any roof pitch. It may be used above an offset to support the offset
or as a supplementary support when the chimney height exceeds that
of the primary support.
The Roof Support will support a total height of 50 feet of chimney
sections of which 20 feet may be suspended beneath it. All chimney
sections below the support must be secured with Locking Bands.
Install the Support Band on the chimney length at the desired position
by tightening the Support Band bolt and by screwing four stainless steel
sheet metal screws through the Support Band (pre-punched holes) and
into the outer casing.
Once the box is at the desired position, ensure the box is level and
nail the box to the framing using four 2” spiral nails or #8 x1-1/2"
wood screws per side. The excess material sticking above the roof can
either be trimmed off before attaching the box to the framing or, after
it is installed the corners can be cut and the excess material folded down
onto the roof deck.
The bottom chimney length(s) must protrude through the opening of the
Cathedral Support Box into the living space so that proper clearances
are maintained from the stove pipe connector to the lower side of the
ceiling. Refer to Chart 3 on page 16 at the back of these instructions for
proper clearances. Do not offset the chimney below the Cathedral
Support.
Lower the chimney length down through the opening in the bottom of
the support so that the Support Band makes contact with the bottom of
the Support Box. (See Figure 14).
NOTE: The male coupler of each chimney length must be up.
NOTE: To reduce cold air infiltration into the dwelling you
can install the optional Universal Shielding Insulation (JUSI)
into the Cathedral Support Box. See separate installation
instructions packaged with the JUSI.
4 painted ceiling trim angles (2 short & 2 long) are supplied with
fastening screws to finish off the Cathedral Support Box at the ceiling
level. The 2 long pieces are trimmed off to match the pitch of the ceiling.
Storm Collar
Chimney Sections
Rain Cap
Ventilated Flashing
Support Box
Support Band
Ceiling Trim Angles
Ceiling Trim Angles
Stove Pipe Adaptor
The Roof Support is mounted directly on the roof sheathing with its feet
resting over rafters or a framed opening to form a solid base.
Frame a rectangular roof opening to provide a 2" minimum air space
clearance from combustible material. The framing dimension is
measured in the horizontal plane.