33
VCG Biltmore Series • SB100 • 4013-303 Installers Manual • Rev A • 02/19/15
3. Fireplace Opening and Hearth Extension
Flush with the Floor
Non-combustible flooring a minimum of 30 in. (762 mm)
in front of and 12 in. (305 mm) to each side of the fuel
opening is required.
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.
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.
Noncombustible Material
Protective Metal
Hearth Strip
30 in. Min.
Hearth Extension
1/2 in. Micore
or equivalent
insulation
Finished
Floor
Note: The bottom of the
fireplace opening is 8 3/4 in.
(222 mm) above the bottom
of the fireplace. Finished
hearth must NOT extend
above this level.
Figure 7.9 Flush Hearth Extension Side View
C. Non-Combustible Sealant Material
After completing the framing and applying the facing
materials over the framing, a bead of non-combustible
sealant must be used to close off any gaps at that top
and sides between the fireplace and hearth.
WARNING!
Risk of Fire!
Vermont Castings Group is not responsible for
discoloration, cracking or other material failures of
finishing materials due to heat exposure or smoke.
• Choose finishing materials carefully.
Non-combustible Sealant
Figure 7.10 Place Non-combustible Sealant