1/4"
1"
MAX
WINDOW
FRAME
HEARTH
EXTENSION
WINDOW
TRACK
SUB-
FLOOR
While a hearth extension is not required for this fi replace, one is recommended for aesthetic
reasons. The hearth extension should be noncombustible and must not be any more than 1"
above the bottom of the fi replace. If thicker, fi replace must be raised up accordingly.
Caution: Hearth extensions thicker than 1" will interfere with the window frame.
Fig. #20
12
TC36_CSTE 071010-44
Hearth Extension
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