Hearth Extension 4" Or More Below Fireplace Opening; Fireplace Opening - Vermont Castings BE36 Installation Manual

WARNING! Risk of Fire. A raised hearth extension
built flush with the fireplace opening or less than 4 in.
(102 mm) below the fireplace opening requires the fire-
place be installed on a non-combustible surface.
1. Hearth Extension 4" or more Below Fireplace
Opening
Continuous,
non-combustible sealant
1/2 in. Micore Hearth
Tile, stone or other
Extension (or
non-combustible material
equivalent insulation)
Floor constructed of wood or
other combustible material
Figure 7.4 Hearth Extension Construction
2. Hearth Extension Less Than 4" Below Fire-
place Opening
The hearth framing must be constructed of non-com-
bustible materials (such as metal framing or equivalent
material) and placed on HX3(s), HX4(s), or equivalent
material. See Figures 7.4 and 7.5.
When creating the platform, allow for the thickness
of the non-combustible finishing materials.
Seal gaps between the hearth extension and the front
of the fireplace with a bead of non-combustible sealant
or grout.
Note: The bottom of the fireplace
opening is 7.5 in. (191 mm)
above the bottom of the
fireplace. Finished hearth must
NOT extend above this level.
Non-combustible
Finishing Material
Non-combustible
Framing Material
1/2 in. Micore
Protective Metal
or equivalent
Hearth Strips
insulation
Figure 7.5 Raised Hearth Extension Detail
VCG Royalton Series • BE36/42 • 4044-197 Installation Manual • Rev A • 02/18/15
Fireplace
Opening
4 in.
(102 mm) min.
2 in. (51 mm) of the Protective
Metal Hearth Strip is required
under the front of the fireplace
Non-combustible
material must be used
under the fireplace if
top of hearth is less
than 4 in. (103 mm)
below the fireplace
opening.
Floor
or platform
Noncombustible
Framing Material
Figure 7.6 Raised Platform Hearth Extension-Framing
Non-combustible
Finishing Materials
Figure 7.7 Raised Platform Hearth Extension-Finishing
HX4 or
equivalent
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