Nailing Flanges; Facing And Mantel - Lennox Hearth Products Montecito Installation And Operation Instructions Manual

Insulated Chase Construction
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.
7'
(2.1 m)
Min.
Figure 9 1/2" Plywood

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)
Mantel and Facing
The mantel must be installed at least 42"
(1067 mm) above the base of the fireplace
(Figure 11).
Roof Support
Attic Radiation
Shield
Firestop
6' 8"
(2 m)
Min.
Fireplace Frame Section
1
2
1
Unbend to floor
and nail/screw
2
1. Fireplace
2. Front of fireplace
3. Wood frame (2" x 3" min)
4. Drywall
5. Tiles
6. Rock board or other
7. Brick
Figure 10
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Storm Collar
Flashing
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.
Drywall or Any Rigid
Material
2" x 4"
(Top View)
3
4
5
6
3
4
7
Insulate Joists
Same As Ceiling
Draft Stops
Firestop
CTDT
Termination
Note: Non-
Combustible
Chase
Flashing
Must Be
Used To
Cover
Chase
Opening
8'
8'
(2.4 m)
Level
Level
Insulation
(Thermal Barrier)
Mantel and Facing
(Side View)
12"
Drywall
MAX
2" X 3" Min.
Mantel
(51mm x 76mm)
42" (1067mm)
Rock Board
or Other
Noncombustible
Facing
Drywall
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Rock Board
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or Other
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Noncombustible
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Facing
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Figure 11 ... .. ...
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Optional
Insulation
In Outside
SEE NOTE
Walls Of
Chase
Solid
Continuous
Surface
Outside
Base
Spacer
9