Lennox Hearth Cambria - Manual (Page 12)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
12
Figure 16
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.
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
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
7’ 10”
(2.4 m)
Min.
7’ 6”
(2.3 m)
Min.
8’
(2.4 m)
Level