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D. Finishing Material
Refer to Sections 11.A. and Sections 11.B. for combus-
tible/non-combustible materials. Refer to Figure 11.9 for
non-combustible zone.
WARNING! Risk of Fire! You must maintain clearances.
• Use only non-combustible framing material below
standoffs.
• Sheetrock, wood or other combustibles must NOT be
used as sheathing or facing in the non-combustible
zone.
• DO NOT cover metal replace front with combustible
materials.
• Install combustible materials only to specied clearances
on top front and side edges.
• Complete framing and apply facing material (drywall)
over framing.
• A bead of 300-deg F minimum non-combustible sealant
must be used to close off any gaps at the top and sides
between the replace and facing to prevent cold air
leaks.
• Large gaps can be bridged with fiberglass rope
gasket.
• Only non-combustible materials may be used to cover
the metal replace front.
These surfaces may be
covered with non-
combustible material.
High temperature
sealant.
Figure 11.2 Non-combustible Facing
Metal strips are placed 2 in. (51 mm)
under the front of the fireplace and must
extend beyond the front and sides of
fireplace opening by 2 in. (51 mm)
High temperature
(300°F min.) continuous,
non-combustible sealant
Floor constructed of
wood or other
combustible material
HX3 Hearth
Extension or
equivilent
insulation
Finished combustible wall
Combustible material
Non-combustible
decorative facing
(up to full brick depth)
2 x 4 header, flush with
front of stand-offs
Tile, stone or other
non-combustible material
Flat 2 x 4 stud wall
Figure 11.3 Decorative Facing
Heat & Glo • HST-42D • 27177 • Rev AG • 7/12