Matrix Insert Installation and Operation Manual
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9.4.1
INSTALLATION RAISED OF 5" AND LESS
If non-combustible material floor protection needs to be added in front of and level with the
hearth extension of the masonry fireplace (F = 5" or less), an R-value equal to or greater than 1.00
is required and should extend at least 23" (584 mm) in front of the unit (B).
9.4.2
INSTALLATION RAISED OF MORE THAN 5"
If the extension of the masonry hearth is raised at least 5" (127 mm) from the floor protection, a
non-combustible material, without an R-value, must extend at least 16" (406 mm in USA) or 18"
(457 mm in Canada) in front of the unit.
