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B. Decorative Facing
After completing the framing and applying the facing material
(drywall) over the framing, a bead of non-combustible seal-
ant must be used to close off any gaps at the top and sides
between the fi replace and facing to prevent cold air leaks.
Large gaps can be bridged with fi berglass rope gasket.
The metal face of the fi replace can be covered with non-
combustible fi nishing material.
These surfaces
may be covered
with non-combustible
material.
Figure 8.11 Finishing
Finished combustible wall
Combustible material
Non-combustible
decorative facing
(up to full brick depth)
High temperature
(300°F min.) continuous,
non-combustible sealant
Tile, stone or other
non-combustible material
HX3 or HX4
Hearth Ext
or equivilent
insulation
Figure 8.12 Decorative Facing
32
High temperature
sealant.
Hearth
Refractory
Metal strips are placed 2 in. (51 mm)
under the front of the fireplace and must
extend beyond the front and sides of
fireplace opening by 2 in. (51 mm)
Heat & Glo • RH-36/RH-42 • 4044-153 Rev S • 06/07
C. Finishing Material
• Non-Combustible Materials
Material which will not ignite and burn. Such materials
are those consisting entirely of steel, iron, brick, tile, con-
crete, slate, glass or plasters, or any combination there-
of.
Materials that are reported as passing ASTM E 136,
Standard Test Method for Behavior of Materials in a Ver-
tical Tube Furnace at 750° C, shall be considered non-
combustible materials.
Fire Risk
Finish all edges and fronts to clearances and
specifi cations.
•
Metal fi replace front may be covered with
non-combustible material only.
•
Do NOT overlap combustible materials onto
fi replace front.
•
Install combustible materials up to specifi ed
clearances on top front and side edges.
•
Seal joints between the fi nished wall and
fi replace top and sides using only a 300° F
minimum sealant.
Flat 2 x 4 stud wall
2 x 4 header, flush with
front of stand-offs
4 in. (102 mm) min.
between bottom of fireplace
opening and finished hearth
Floor constructed of wood or
other combustible material
WARNING
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