Table of Contents
Advertisement
6
EXTERIOR INSTALLATION (CONT'D)
WALL SUPPORT
INSTALLATION INSTRUCTIONS
Step 1. Determine where the chimney will pass
through the wall.
• For concrete walls cut an opening slightly larger
than the chimney.
• For combustible walls cut and frame a hole 4"
larger than the chimney, midway between the wall
studs (see Table 8 below for sizing).
Normally wall studs are placed at 16" on center.
With the hole midway between them, the support
will fasten to these studs and thus ensure a strong
attachment to the wall (see Figure 20).
Step 2. Wood walls: Place the exterior half of the Wall
Thimble (WTI) in the opening from the outside.
Nail in place using (4) 2'' nails or 1'' screws.
This Wall Thimble is adjustable from 7'' to 12''
(see Figure 21). Make sure the insulation pad
is cut to the desired length according to the
wall thickness. Place the interior half of the
Wall Thimble inside the exterior half of the Wall
Thimble. For a wall requiring more than 12", a
shield extension can be field fabricated using
galvanized sheet metal 26 gauge minimum.
Ensure the opening for the chimney to pass through
is straight and level. Screw the outer thimble in place
with the provided screws (see Figure 22).
NOTE: The cavity surrounding the wall thimble metal
shield can be filled with insulation (see Figure 22).
CHIMNEY SIZE
COMBUSTIBLE
5"
11-3/8'' x 11-3/8''
6"
12-3/8'' x 12-3/8''
7"
13-3/8'' x 13-3/8''
8"
14-3/8'' x 14-3/8''
10"
16-3/8'' x 16-3/8''
OPENING SIZE
CONCRETE
7-3/4''
8-3/4''
9-3/4''
10-3/4''
12-3/4''
Table 8
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Adjustable TSA
RESU
Figure 19
Figure 20
EXTERIOR
Adjustable 7" to 12"
Figure 21
INSIDE
LEVEL
INTERIOR WALL THIMBLE
1" SCREWS
Figure 22
WALL STUD
Adjustable TSAC
WALL FRAMED OPENING
WALL STUDS
FRAMED BOX (SAME
SIZE WOOD AS STUDS)
INTERIOR
WTI
OUTSIDE
HOUSE INSULATION
(CORNERS OF WOOD FRAMING)
EXTERIOR WALL THIMBLE
2" NAILS
17
Advertisement
Table of Contents
