Lennox Hearth Products Ladera-BK Installation And Operation Instructions Manual page 10

Insulated Chase Construction
Note: Floor and wall below the attic must be
insulated using the same insulation.
Figure 9
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).
10
Roof Support
Attic Radiation
Shield
Firestop
6' 8"
(2 m)
Min.
7'
(2.1 m)
Min.
1/2" Plywood
1. Fireplace
2. Tiling flange
3. Wood frame (2" x 3" min)
4. Drywall
5. Tiles or brick
Figure 10
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Storm Collar
Flashing
Drywall or Any Rigid
Material
2 x 4
Fireplace Frame Section
(Top View)
3
1
5
2
Insulate Joists
Same As Ceiling
Draft Stops
Floor
Ceiling
Firestop
Wall
CTDT
Termination
• Must have the same firestopping
Note: Non-
resistance as adjacent wall.
Combustible
• Must have the same insulation as Chase
Flashing
adjacent ceiling.
Must Be
Used To
• Follow local rules regarding framing
Cover
construction.
Chase
Opening
8'
8'
(2.4 m)
Level
Level
Insulation
(Thermal Barrier)
Mantel and Facing (Side View)
Mantel
39'' (990 mm)
4
Rock Board
or Other
Noncombustible
Facing
Rock Board
or Other
Noncombustible
Facing
Figure 11
Optional
Insulation
In Outside
Walls Of
Chase
Solid
Continuous
Surface
Outside
Base
Drywall
2" X 3" Min.
(51mm x 76mm)
Spacer
Drywall