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8
53D9042. Rev 1 03/03
FLOOR PROTECTION
If this fireplace is installed on a combustible floor, the floor area 16 inches in front of, and 8 inches either side
of the fireplace opening must be protected by an insulating noncombustible hearth extension. See Figure 7
With either type hearth extension minor shifting of the supporting floor or expansion and contraction may
eventually cause a crack to develop between the hearth extension and the face of the fireplace. To help
prevent the crack from developing, the hearth extension materials must be firmly fastened in place. Wall ties
should be screwed to the face of the fireplace and imbedded in the mortar joints of brick, stone, or other non-
combustible materials. The metal safety strip packed with the fireplace must be placed beneath the fireplace
and extended under the hearth extension or into a mortar joint of the hearth extension as shown by Figure 9.
In the event a crack does eventually develop, the metal safety strip will serve as a barrier to prevent sparks or
embers from falling from the fireplace onto combustible flooring materials.