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01/04 4039-150 Rev B 19
MONTANA INSTALLATION INSTRUCTIONS
Figure 23 - Position the Hearth Extension
15. Position the Hearth Extension
Position and secure the hearth extension over the protective
metal strips that have been placed partially under the fireplace
front. These strips should be protruding approximately 2 from
under the fireplace front and 2 on both sides of the fireplace
opening. Seal the crack between the hearth extension and
fireplace with a bead of noncombustible sealant. See
Figure 23. Apply a noncombustible finishing material of your
choice to the hearth extension.
16. Finishing Material
Do not install combustible materials over the face of the
fireplace! This poses a safety hazard and may start a fire.
You may only use noncombustible material over the face of
the fireplace.
a. Combustible Material
Material which is made of or surfaced with wood,
compressed paper, plant fibers, plastics, or any material
capable of igniting and burning, whether flame proofed
or not, plastered or unplastered.
b. Noncombustible Material
Material which will not ignite and burn. Such materials
are those consisting entirely of steel, iron, brick, tile,
concrete, slate, glass or plasters, or any combination
thereof.
c. Noncombustible Sealant Material
Sealants which will not ignite and burn; General Electric
RTV103 Black (or equivalent), Rutland, Inc. Fireplace
Mortar #63 (or equivalent).
After completing the framing and applying the facing
material (dry wall) over the framing, a ½ wide (maximum)
bead of noncombustible sealant must be used to
close off any gaps at the top and sides between the
fireplace and facing to prevent cold air leaks.
Only noncombustible materials may be used to cover
the metal fireplace front.
17. Mantel
A combustible mantel may be positioned no lower than 12
above the top of the fireplace opening. See Figure 6, page 9.
The combustible mantel may have a maximum depth of 12.
Combustible trim pieces that project no more than 1½ from
the face of the fireplace can be placed no closer than 6 from
the top of the fireplace opening. Combustible trim must not
cover the metal surfaces of the fireplace. This mantel
clearance is in accordance with Section 7-3.3.3 of ANSI/
NFPA211.
18. Glass Doors
This fireplace has been tested and listed for use with doors
as specified in Section C, Fireplace System Components.
Please refer to the manual packed with each set of doors for
installation instructions.
19. Chase Top
Construct a chase of desired materials maintaining a minimum
2 air space around the chimney.