36
IMPORTANT!
Hearth extension design must be
determined before installation of fireplace.
Floor
Non-combustible
Framing Material
Non-combustible
Finishing Material
Protective Metal
Hearth Strips
1/2 in. Micore
or equivalent
insulation
Non-combustible
Material
Figure 11.3 Raised Platform Hearth Extension Detail
Raised Hearth Extension Framing
WARNING! Risk of Fire.
A raised hearth extension built
flush with the fireplace opening (Figure 11.3) or less than
4 in. (102 mm) below the fireplace opening requires the
fireplace be installed on a non-combustible surface.
The hearth framing must be constructed of non-combus-
tible materials (Figure 11.2) and placed on 1/2 in. Micore,
or equivalent material (Figure 11.4). When creating the
platform, allow for the thickness of the non-combustible
finishing materials (Figure 11.5).
Non-combustible
Framing Material
1/2 in. Micore or
equivalent insulation
Figure 11.4 Raised Platform Hearth Extension-Framing Materials
2 in. (51 mm) of the Protective
Metal Hearth Strip is required
under the front of the fireplace
Tile, stone or other
non-combustible material
Floor constructed of wood or
other combustible material
Fireplace
Opening
4 in.
(102 mm) min.
Continuous, non-
combustible sealant
1/2 in. Micore Hearth
Extension (or
equivalent insulation)
See Table 11.2.
Figure 11.2 Hearth Extension Construction
B
A
C
C
D
4 in. (102 mm)
minimum between
bottom of fireplace opening
and finished surface of hearth extension
Figure 11.1 Hearth Extension Dimensions
Model #
A
B
C
D
ODVILLA-36
in.
36
52
8
16
mm
914
1321
203
406
ODVILLA-42
in.
42
66
12
20
mm
1067
1676
305
508
Outdoor Lifestyles by Hearth & Home Technologies • ODVILLA Wood Owners/Install • 4072-345 Rev A • 08/22