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Figure 9
Insulated Chase Construction
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.
7’
(2.1 m)
Min.
Note: Floor and wall below the attic must be
insulated using the same insulation.
Attic Radiation
Shield
Roof Support
Storm Collar
Flashing
Drywall or Any Rigid
Material
2 x 4
FIREPLACE
1/2” Plywood
6’ 8”
(2 m)
Min.
Firestop
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
8’
(2.4 m)
Level
Facing
1. Combustible material must be installed flush
with the fireplace. It may not project in front
of and on the fireplace (i.e. the steel facade
of the fireplace) (Figure 10).
2. Non-combustible materials such as brick,
stone or ceramic tile may project in front of
and onto the fireplace facing up to the tiling
flange (Figure 13).
Mantel and Facing
The mantel must be installed at least 39’’ (990
mm) above the base of the fireplace (Figures
7b and 11
).
1
5
3
4
1. Fireplace
2. Tiling flange
3. Wood frame (2” x 3” min)
4. Drywall
5. Tiles or brick
Fireplace Frame Section
(Top View)
Figure 10
Figure 11
Mantel
Rock Board
or Other
Noncombustible
Facing
39’’ (990 mm)
Drywall
2” X 3” Min.
(51mm x 76mm)
Spacer
Mantel and Facing (Side View)
2
Rock Board
or Other
Noncombustible
Facing
Drywall
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
10