The non-combustible finishing
material across the top of the
fireplace opening will be even
with the lower edge of the metal
face.
Non-combustible finishing
materials MUST extend past the
side faces by 1 1/4 in. (32 mm)
to cover the edges of the
refractory. Finished opening
should be 38 x 50 in. (965 x
1270 mm) to allow for door
installation.
Mortar should be applied
after the finishing material
is installed. Mortar will be
applied between the
finishing materials and the
refractory edges, bottom
and sides.
The seam between the
finishing materials and
firebox top must be sealed
with a high-temperature
silicone sealant.
The surface of the finished hearth extension and
the surface of the hearth refractory should be level.
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