Heat & Glo Wood Burning Fireplace RH-36 Series Owner's Manual page 39

4 in. (102 mm)
minimum between
bottom of fireplace opening
and finished surface of hearth extension
C
B
Figure 11.1 Hearth Extension Dimensions
Continuous, non-
combustible sealant
1/2 in. Micore Hearth
Tile, stone or other
Extension (or
non-combustible material
equivalent insulation)
See Table 11.2.
Floor constructed of wood or
other combustible material
Figure 11.2 Hearth Extension Construction
A
C
D
Fireplace
Opening
(102 mm) min.
2 in. (51 mm) of the Protective
Metal Hearth Strip is required
under the front of the fireplace
Heat & Glo • RH-36/RH-42 • 4044-153 • Rev W • 11/08
Raised Hearth Extension Framing
WARNING! Risk of Fire. A raised hearth extension built
fl ush with the fi replace opening (Figure 11.3) or less than
4 in. (102 mm) below the fi replace opening requires the
fi replace 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
fi nishing materials (Figure 11.5).
IMPORTANT! Hear th extension design must be
determined before installation of fi replace.
Noncombustible
Finishing Material
Noncombustible
Framing Material
Figure 11.3 Raised Platform Hearth Extension Detail
4 in.
Noncombustible
Framing Material
Figure 11.4 Raised Platform Hearth Extension-Framing Materials
Noncombustible
1/2 in. Micore
Protective Metal
or equivalent
Hearth Strips
insulation
1/2 in. Micore or
equivalent insulation
Material
Floor
39