Instruction

17
3. Install a Firestop Radiation Shield below the
nished ceiling or framing members. Trim the
‘tube’ portion of the Firestop Radiation Shield
as needed if it interferes with the Roof Support
Installation (Fig.22).
4. Follow steps B5 and B6 from the Roof
Support section.
Note: Non-combustible insulation is not
approved for use with Roof Supported
installations.
METHOD 3: TEE-SUPPORTED
INSTALLATIONS
Tee-Supported installations are used when
passing through a wall to a chimney. The
Tee Support can hold a maximum of 60’ of
DuraTech Chimney (Table 2). The various
support components are adjustable in length
from the wall to better t your installation.
There are two options when installing a Tee-
Supported installation: the Tee Support above
the Tee, or the Tee Support below the Tee.
The required parts and general conguration
are as shown in Fig.24, 25, 26 and 27.
1. Place Appliance: Follow Step 1 from
“Ceiling-Supported” method detailed earlier.
2. Locate, Cut & Frame Opening: Determine
the location where the chimney will pass through
the wall. The chimney should pass through
the wall, centered between two studs. The
height of the penetration can be determined
by positioning sections of stove pipe until you
have the desired conguration (refer to the
appliance manufacturer’s installation instructions
for restrictions on stove pipe). Cut and frame
an opening in the inner and outer walls at this
location. Refer to Table 1 for the appropriate
framing dimensions.
3. Install Wall Thimble: The Wall Thimble
is a two-piece component which includes
the Interior half and the Exterior half. On the
outside wall, install the back portion of the Wall
Thimble. Center the back portion of the Wall
Thimble (with shield inside wall) in the framed
opening of the outside wall (Fig.24). Be sure
to seal the ange of the Wall Thimble around
the wall by using a non-hardening waterproof
sealant. Attach the back portion of the Wall
Thimble to the outside wall using at least (4)
8-penny nails or (4) #8, 1-1/2” wood screws.
There must be a continuous shield within the
wall. If the two halves of the Wall Thimble do not
overlap, a eld-fabricated extension constructed
out of 26-gauge galvanized or stainless steel is
needed. Non-combustible insulation that adheres
to the specications outlined on page 4 may
be inserted into the Wall Thimble. Do this by
wrapping an insulation blanket around the pipe
between the thimble sleeves. Ensure the butting
edges of insulation are pointing downward.
Smaller pieces of insulation may be used to ll in
the corners of the thimble pass-through. Do not
compress the insulation more than 25% or you
may adversely affect the thermal resistance of the
insulation.
4. Install Tee Support: Install the Tee Support
on the outside wall. Position Tee Support so that
the chimney Tee will be centered inside the Wall
Thimble (Fig.24, 25, 26 & 27). The Tee Support
may be installed either above the Tee or below
the Tee (within one pipe section), as seen in
Fig.25. See Table 2 for weight bearing values of
components. Important: Verify that Tee Support
is level, and secure the Support to the wall using
(4) #8, 2-1/2” screws for each side. Slide support
base over leg brackets to adjust for desired
clearance to wall, and secure by tightening bolts
(Fig.24 & 25).
5. Install Tee and Cleanout Chimney Section:
Twist lock the Tee onto a desired length of
Chimney to be used as the cleanout section.
Use only one chimney section (any length) to
attach to bottom of the Tee. Tighten support
band around chimney section at proper height