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3. Fireplace Opening and Hearth Extension
Flush with the Floor
Non-combustible flooring a minimum of 20 in. (762 mm)
in front of and 12 in. (305 mm) to each side of the fuel
opening is required on the BE36 and BE42.
The hearth framing must be constructed of non-
combustible materials (such as metal framing or
equivalent material) and placed on HX3(s), HX4(s), or
equivalent material.
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 1/2 in.
(191 mm) above the bottom
of the fireplace. Finished
hearth must NOT extend
above this level.
Finished
20 in. Min.
Floor
Hearth Extension
Micore
Noncombustible Material
Figure 7.8
Flush Hearth Extension Side View
30
Majestic Royalton Series • BE36/42 • 4044-197 Installation Manual • Rev J • 09/18
Non-combustible
material must be
used under the
fireplace if top of
hearth is less than
4 in. (103 mm)
below the
fireplace opening.
Protective Metal
Hearth Strip
C. Non-Combustible Sealant Material
After completing the framing and applying the facing
materials over the framing, a bead of noncombustible
sealant must be used to close off any gaps at the top
and sides between the fireplace and hearth.
Non-combustible Sealant
Figure 7.9
Place Non-combustible Sealant
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