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Floor
Non-combustible
Framing Material
Non-combustible
Finishing Material
Protective Metal
Hearth Strips
1 in. Micore or
equivalent insulation
& 1/2 in. Durock
Note:
The bottom of the
fireplace opening is 3-3/4 in.
(95.3mm) above the bottom
of the fireplace. Finished
hearth extension must NOT
extend above this level.
Platform must be built
to raise the bottom of
the fireplace opening
to the level of the
desired hearth height.
20 in. Min.
Hearth Extension
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* 2 in. (51 mm)
Continuous,
non-combustible sealant
Tile, stone or other
non-combustible material
Floor constructed of wood or
other combustible material
1 in. Micore or
equivalent
insulation
(see Table)
Fireplace
Protective
Metal Hearth
Strip
1/2 in. Durock
*
*
Note:
The bottom of the fireplace opening
is 3-3/4 in. (95.3mm) above the bottom of
the fireplace. Finished hearth extension
must NOT extend above this level.
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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.
Non-combustible
Finishing Material
Protective Metal Hearth Strip
Continuous, non-combustible sealant
between hearth & fireplace
30 in. Min.
Hearth Extension
1 in. (25.4 mm)
Micore and
1/2 in. (13 mm)
Durock
Combustible
Finished
Floor
Bottom of
Fireplace Opening
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