10
Note:
a Firestop Radiation Shield is not
installed where the chimney penetrates
through the roof. Instead, you will need to
install Roof Radiation Shields (required for
18”-24” diameters only - see
Step 7
) around
the roof joist members. The Firestop Radiation
Shield is installed on the underside of the
ceiling/floor framing, with the cylindrical “tube”
portion of the shield pointing upward
(Fig 7)
.
Use a minimum of either (1) 8 penny nail or (1)
1-1/4” wood screws per corner. Refer to Table
2 for framing requirements.
7. Install Roof Radiation Shields:
Roof
Radiation Shields are included with the
Flashing for 18”-24” diameters. Roof
Radiation Shields provide protection for roof
framing members.
Note: Combustible materials will still need to
be a minimum of 2” away from the chimney.
Roof Radiation Shields must be installed with
their face 1/2” off of the roof framing joists
(Fig
8)
. Depending upon the pitch of your roof, trim
the Roof Rafter Shields with tin snips so they
provide complete coverage of the roof framing
exposed 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
(Fig 8)
.
8. Assemble Chimney Sections:
Lower the
female end of the first Chimney Section in the
Support Box
(Fig 9)
. Sheet metal screws are
not required between the first Chimney Section
and the Support Box. For each additional
Chimney Section use the (6) Sheet metal
screws provided to make a secure connection
between the chimney sections
(Fig 9)
. Do not
penetrate the inner liner of the chimney.
9. Install Attic Insulation Shield:
Install
the Attic Insulation Shield where the chimney
passes into an attic. It’s purpose is to prevent
debris and building insulation from getting too
close to the chimney
(Fig 10)
. An installed
Figure 8
Figure 9
Figure 10
ATTIC
INSULATION
SHIELD
SUPPORT
BOX WITH
SQUARE
TRIM
CHIMNEY
SECTION
SITS INSIDE
SUPPORT
BOX
INSTALL ROOF RADIATION
SHIELDS WITH A 1/2"
CLEARANCE FROM ROOF
JOIST FACE.
NAILS OR SCREWS
ROOF
JOISTS
ROOF
RADIATION
SHIELDS
