Heatilator Birmingham BIR50-B Installation Manual page 30

Note: The bottom of the fireplace
opening is 3-3/4 in. (95.3 mm)
above the bottom of the
fireplace. Finished hearth must
NOT extend above this level.
Noncombustible
Finishing Material
20 in. Min.
Hearth Extension
Noncombustible
Framing Material
1 in. Micore and
1/2 in. Durock
or equivalent
insulation
Figure 6.6 Raised Platform Hearth Extension Detail
Noncombustible
Framing Material
Figure 6.7 Raised Platform Hearth Extension-Framing
Non-combustible
Finishing Materials
Figure 6.8 Raised Platform Hearth Extension-Finishing
 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev AA • 06/23
Floor
Protective Metal
Hearth Strips
HX4 or
equivalent
2. Raised Hearth Extension and Raised Fire-
place
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or grout.
Note: The bottom of the fireplace opening is 3-3/4 in. (95.3mm) above the bottom of the
fireplace. Finished hearth must NOT extend above this level.
Continuous,
non-combustible sealant
Tile, stone or other
non-combustible finishing
material
20 in. minimum
Hearth Extension
Protective Metal
Hearth Strips
1 in. Micore or
equivalent insulation Non-combustible
& 1/2 in. Durock Framing Material
Figure 6.9 Raised Hearth Extension and Fireplace Framing
Materials
3. Fireplace Opening and Hearth Extension
Flush with the Floor
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or grout.
Bottom of
fireplace opening
Platform must be built
to raise the bottom of
the fireplace opening
to the level of the
desired hearth height.
Floor and platform constructed of
wood or other combustible material