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Figure 9
Insulated Chase Construction
Figure 11
Floor
Ceiling
Wall
• Must have the same firestopping
resistance as adjacent wall.
• Must have the same insulation as
adjacent ceiling.
• Follow local rules regarding framing
construction.
Attic Radiation
Shield
Roof Support
Storm Collar
Flashing
Drywall or Any Rigid
Material
2” x 4”
FIREPLACE
1/2” Plywood
Firestop
1
3
4
5
6
2
1
2
7
3
4
1. Fireplace
2. Front of fireplace
3. Wood frame (2” x 3” min)
4. Drywall
5. Tiles
6. Rock board or other
7. Brick
Fireplace Frame Section
(Top View)
Figure 10
Mantel
Rock Board
or Other
Noncombustible
Facing
Drywall
Spacer
Mantel and Facing
(Side View)
Insulate Joists
Same As Ceiling
Draft Stops
Firestop
CTDT
Termination
Note: Non-
Combustible
Chase
Flashing
Must Be
Used To
Cover
Chase
Opening
Optional
Insulation
In Outside
Walls Of
Chase
Solid
Continuous
Surface
Outside
Base
Insulation
(Thermal Barrier)
8'
Level
7’
(2.1 m)
Min.
6’ 8”
(2 m)
Min.
8’
(2.4 m)
Level
42” (1067mm)
2” X 3” Min.
(51mm x 76mm)
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Rock Board
or Other
Noncombustible
Facing
Drywall
NOTE: It is recommended that the
chase walls and floor be insulated
in the same manner, using the
same insulation, as the rest of the
building, below the attic.
SEE NOTE
Mantel and Facing
The mantel must be installed at least 42”
(1067 mm) above the base of the fireplace
(Figure 11).
Nailing Flanges
Four nailing flanges are provided to secure the
fireplace to the floor (see figure below). Bend
the nailing flanges down so that each flange is
flush with the floor, then using nails or screws,
secure the fireplace to the floor (2 places each
side). The heads of the screws or nails must
be large enough to completely cover the holes
in the nailing flanges.
Fireplace Side
Nailing Flange
(2 places each side)
Unbend to floor
and nail/screw
12”
MAX
NOTE:DIAGRAMS&ILLUSTRATIONSARENOTTOSCALE.
9