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INSULATED CHASE
CONSTRUCTION
NOTE: It is recommended
that the chase walls and floor
be insulated in the same man -
ner, using the same insulation, as
the rest of the building, below the attic.
Figure 12A
TOP STAND-OFF ASSEMBLY AND NAILING FLANGE POSITIONS
NOTES:
- Top standoff assembly must be installed during installation.
- Adjustable stand-off and nailing flanges allow for 1/2" of adjustment
front to back for desired installation. See Figure 12b.
Side Nailing Flanges
Figure 12B
12
Roof Support
Attic Radiation
Shield
Firestop
6' 8" Min.
7 Ft. Min.
Adjustable
Standoffs
1/2" Plywood
Top Standoff
Assembly
See Detail A for
Installation
Options
Adjust standoff
And nailing flanges
To rear position
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Storm Collar
Flashing
Floor,
Ceiling &
Wall
Fireplace
Drywall or
Any Rigid
Material
2" x 4"
Proud Installation
Insulate Joists
Same As Ceiling
Draft Stops
Floor
Ceiling
Wall
Firestop
CTDT
Termination
• Must have the same firestopping
resistance as adjacent wall.
• Must have the same insulation as
Note: Non-
adjacent ceiling.
Combustible
Chase
• Follow local rules regarding framing
Flashing
construction.
Must Be
Used To
Cover
Chase
Opening
8'
8'
(2.4 m)
Level
Level
Insulation
(Thermal Barrier)
Flush Installation
DETAIL A
Optional
Insulation
In Outside
SEE NOTE
Walls Of
Chase
Solid
Continuous
Surface
Outside
Base
Bend mounting
flange back-
ward as shown
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