Installation Instructions

ADJUSTABLE INTERMEDIATE
WALL SUPPORT
If the total chimney height exceeds the Wall Support limitations an
Adjustable Intermediate Wall Support must be installed. Use of an
AIWS will support an additional 38ft. of chimney. Slide the assembled
Intermediate Wall Support over the protruding length of chimney.
Fasten the Intermediate Wall Support to the wall using four 1/4” by 2”
wood screws through the pre-punched slots in each bracket. Install the
draw band around the protruding chimney length securely against the
support plate. Install four stainless steel sheet metal screws firmly into
the outer casing of the chimney, through the pre-punched holes in the
draw band. Cover the heads of the screws with a non-hardening
waterproof caulking.
From outside the building, slide the assembly (Chimney Length installed
on the Tee branch) through the Wall Thimble ensuring the male coupling
on the Tee is facing upward. Insert and twist lock the Adaptor Ring in
the female coupler of the Insulated Tee (bottom of Tee). Place the
assembled Wall Support against the wall (support plate facing up) directly
below the Tee. Slide the Wall Support up to the Tee ensuring that the stub
of the Adaptor Ring (Figure 12) is inserted into the opening of the
Support Plate.
To complete a proper Cathedral Ceiling Support installation, the
following parts will or may be required:
- Cathedral Ceiling Support (CCS): For sloped or angled ceiling.
- Stove Pipe Adaptor (ASE): Transition from chimney to flue pipe.
- Roof Flashing Assembly: Required when the chimney penetrates a
roof.
- Suitable lengths of chimney: The chimney diameter should be sized to
suit the appliance.
- Universal Shielding Insulation (JUSI): To stop cold air infiltration.
- Locking Bands (SLB): For added security at all joints.
- Rain Cap: Standard or Deluxe model.
The SuperVent/SuperPro Cathedral Ceiling Support will support a total
of 38 feet of chimney of which 15 feet of chimney can be suspended below
the support. The Cathedral Ceiling Support is screwed or nailed into
framing installed between the roof rafters. Chimney joints made below
the support must be secured with Locking Bands.
CATHEDRAL CEILING SUPPORT
9
Lock securely into the Tee branch by twisting clockwise. A Locking
Band must then be installed to secure the connection. Make sure the
nut and bolt are facing down to prevent any water from collecting in the
Locking Band. The Tee branch extension must protrude a minimum of
3" into the room.
NOTE: Ensure that you have set aside the Tee Plug, if not, do so
now as you will require it later.
After framing in your opening to the dimensions specified in Table 1
found in the Framing Details section (measured in the horizontal plane),
slide the Cathedral Support Box into the framed opening.
Use a non-hardening high-temperature silicone sealant (500°F) to seal
around the horizontal chimney length where it enters through the
exterior of the Wall Thimble or the concrete wall.
Prior to securing ensure that the Insulated Tee assembly is plumb, level
and sitting flush on the Support Plate. Secure to the wall through the
pre-punched holes located on each side of the Wall Support Brackets
using eight (8) #14 x 1/2" hex head lag screws or #10 x 2" wood screws.
Make sure they go into solid bracing. If the support is properly
positioned, these lag bolts will go into wall studs placed on 16” centers.
For concrete block or poured foundation use suitable fasteners.
Twist lock a 12" section into the Female Coupler beneath the Support
Plate. Twist lock the Tee Plug into the bottom of the section. You can
substitute an Insulated Tee Plug (ITP) for the 12" section.
Chimney Lengths above the Insulated Tee are simply stacked on and
locked with a 1/8 clockwise turn.
For lateral stability of the chimney above the Wall Support, a Wall Band
must be installed along an outside wall. Install the first Wall Band
midway up the first Chimney Length above the Insulated Tee. Any
additional Wall Bands are to be installed at 8 foot intervals above this
point.
The nut and bolt supplied will fasten the band around the chimney.
Wall Band
Figure 13
Fasten securely the Wall Band around the chimney with the supplied
nut and bolt. Check for clearances and plumb as you fasten the Wall
Bands to the wall. Use a level against the chimney section at each
support stage to keep the assembly plumb.
If the chimney penetrates an eave or overhang (soffit) cut an opening
with 2" clearance all around. To find the exact spot where the chimney
will pass through the eaves, drop a plumb line from the underside of the
eaves to the outer edge of the leveled chimney. Mark 5 or 6 points to
give an outline of the hole. Remember that the hole will need 2"
clearance to the chimney surface. Install an Attic Insulation Shield if
space permits on the under side of the overhang. If it is not possible,
the overhang area can be enclosed and a Rafter Radiation Shield
installed at the roof level and a Finishing Plate on the underside of the
soffit. If the Attic is open to the overhang, close off the access with
suitable building materials ensuring that a 2" air space clearance is
maintained. From above, install the Roof Flashing and Storm Collar
by following the Roof Flashing section in these instructions. If the
overhang is not deep enough to allow the chimney to be fully installed
within the overhang, it will be necessary to cut into it.
DO NOT INSTALL AN OFFSET TO CLEAR THE
OVERHANG!
Ensure that a 2"air space clearance all around the chimney is respected.
Framing and flashing the sides of the opening will be required. Install
a Wall Band at this level.
NOTE: Interior chimneys installed with a Wall Support must use
Firestop Joist Shield (FRS) in place of Wall Bands if extending through
floor/ceiling penetrations and an Attic Insulation Shield when passing
through an unoccupied attic space.
Secure the Wall Band bracket to the wall using two 6d (2”) spiral nails
or #8 x 2" wood screws or longer if required through the pre-drilled holes
(see Figure 13). For concrete or brick veneer walls use suitable masonry
fasteners.