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IMPORTANT!
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.
Continuous,
non-combustible sealant
1/2 in. Durock
Tile, stone or other
non-combustible material
1 in. Micore or
equivalent
insulation
(see Table)
Floor constructed of wood or
other combustible material
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.
20 in. Min.
Hearth Extension
Non-combustible
Finishing Material
1 in. Micore or
equivalent insulation
& 1/2 in. Durock
Non-combustible
Protective
Metal Hearth
Strip
*
*
* 2 in. (51 mm)
Platform must be built
to raise the bottom of
the fireplace opening
to the level of the
desired hearth height.
Protective Metal
Hearth Strips
Floor
Framing Material
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.
Combustible
Finished
Floor
30 in. Min.
Hearth Extension
1 in. (25.4 mm)
Non-combustible
Micore and
Finishing Material
1/2 in. (13 mm)
Durock
Continuous, non-combustible sealant
between hearth & fireplace
Bottom of
Fireplace Opening
Protective Metal Hearth Strip
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