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B. Finish the Wall
Use a wet or dry towel or a soft brush to remove any dust
or dirt from the non-combustible facing material.
Apply a non-combustible adhesive to attach tile, stone or
other non-combustible finishing materials per manufactur
-
er’s instructions.
1. Stone, Brick Finish
WARNING! Risk of Fire! DO NOT
apply tar paper or water
resistive barrier over non-combustible board.
• Apply metal lath to the 1/2 in. thick non-combustible
board with corrosion resistant self-tapping screws
capable of penetrating the metal surface behind the
non-combustible board.
• HHT recommends using type N or type S mortar.
Due to high temperatures, review polymer modifiers
specification sheet before using.
2. Tile, Granite, Marble Finish
• Due to high temperatures, HHT recommends using
unmodified thinset when applying tile.
• When applying granite or marble, HHT recommends
using thinset to adhere. If using a different adhesive,
review specification sheet for application in high
temperature areas.
C. Mantel and Wall Projections
A combustible mantel may be positioned no lower than 66
in. (1676 mm) at 12 in. (305 mm) deep from the base of
the fireplace.
Minimum clearance faceplate to sidewall is 16 in.
The combustible mantel may have a maximum depth of 12
in. (305 mm). Combustible trim pieces that project no more
than 3/4 in. (19 mm) from the face of the fireplace can be
placed no closer than 6 in. (152 mm) from the side of the
decorative front. Surround legs that project more than 3/4
in. (19 mm) must be 16 in. (406 mm) away from the side
of the decorative front. Combustible trim must not cover:
• the metal surfaces of the fireplace
• where the non-combustible board is placed over the
metal surfaces
• the space between the metal face of the fireplace and
framing members
Figure 7.4 Mantel Specifications - Combustible Mantel
A noncombustible mantel may be positioned no lower than
46 in. (1168 mm) from the base of the fireplace. See Fig
-
ure 7.5.
Figure 7.5 Mantel Specifications - Non-Combustible Mantel
66 in.
(1676mm)
Mantel
Clearances are from
bottom of appliance to
lower edge of mantel
or trim
Trim
54 in.
(1372 mm)
36 in. (914 mm)
Ceiling/enclosure
Trim 3/4 in.
max
12 in.
(305 mm)
Noncombustible
Mantel
Clearances are from
bottom of appliance to
lower edge of mantel
or trim.
12 in.
(305 mm)
deep
46 in.
(1168 mm)
2 x 4 header
Seal joint with
non-combustible
sealant to prevent
heat from being drawn
into the wall cavity
12 in.(305 mm)
3/4 in./
(19 mm)
maximum
Grid represents
1 in. squares
66 in.
(1676 mm)
Measured up from
the base of the
fireplace.
Non-combustible
Decorative Facing
such as: Steel, iron,
brick, tile, concrete,
slate, tile, plasters.
DO NOT cover any
air openings in the
face of the fireplace.
54 in.
(1372 mm)
Measured up from
the base of the
fireplace.
Non-combustible board
Combustible mantel
may be positioned
anywhere within the
grid area.
62 in.
(1575 mm)
Measured up from
the base of the
fireplace.
8 in.(203 mm)
Figure 7.3 Mantel Height
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Quadra-Fire • PIONEER - III • 4182-901 Installation Manual • Rev C • 07/19
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