Quadra-Fire 7100FP-BK-B Owner's Manual page 56

Raised Hearth Extension Framing
The hearth framing must be constructed of non-com-
bustible materials (Table 10.2) and placed on an HX4,
or equivalent material (Figure 10.2). When creating the
platform, allow for the thickness of the non-combustible
finishing materials (Figure 10.5).
IMPORTANT! Hear th extension design must be
determined before installation of fireplace.
High temperature
(300°F min.) continuous,
non-combustible sealant
2 thickness of HX4
Hearth Ext
or equivalent insulation
Tile, stone or other
(see Table below)
non-combustible material
Floor constructed of wood or
other combustible material
Figure 10.2 Hearth Extension Construction
The construction of, and materials used for a hearth exten-
sion are shown in Figures 10.1 and 10.3. A hearth extension
of this construction may be covered with any non-combustible
decorative material and may have a maximum thickness as per
Figure 10.2 Seal gaps between the hearth extension and the
front of the fireplace with a bead of non-combustible sealant.
1. Fireplace and Hearth Extension are flush on the
floor:
Non-combustible flooring 20 in. (508mm) in front of and 8 in.
(203mm) to either side of the fuel opening with a minimum
thickness of 1 in. (25mm) and ("k" value = 0.49). See Figure
10.1 on page 55 and Figures 10.3, 10.4, and 10.5.
NONCOMBUSTIBLE
DECORATIVE MATERIAL
1/2 in. (13mm)
(2) HX4 MICORE FACTORY
BUILT HEARTH EXTENSION
(Each HX4 = 1/2 in. (13mm) thick)
Figure 10.3 Side View of Factory Built Hearth Extension
4/12
Protective
Metal Hearth
Strip
2 in. (51 mm)
required
GAP (SEAL WITH NONCOMBUSTIBLE SEALANT)
UP TO BOTTOM OF FASCIA
HEARTH METAL STRIPS
Outer Can
Flange
Ember Strip (Seal gap with
High temp, noncombustible
sealant able to withstand
300°)
Figure 10.4 Fireplace and Hearth Extension Flush on the Floor.
Outer Can
Flange
Ember Strip (Seal gap with high
temp, noncombustible sealant able
to withstand 300°)
Figure 10.5 Hearth Extension Flush on Floor but on Raised Platform
2. Fireplace is installed flush on the floor and Hearth
Extension is raised to the bottom of the Fascia:
Raised hearth must be constructed of non-combustible
materials such as cement block or equivalent material. Non-
combustible flooring on the raised hearth
mm) in front of and 8 in. (203 mm) to either side of the fuel
opening with a minimum thickness of 1 in. (25 mm) and ("k"
value = 0.49). See Figure 10.6.
Outer
6 in. (152mm)
Can
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flange
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 x 4
Ember Strip
(Seal gap with
noncombustible
sealant)
Figure 10.6 Raised Hearth Extension to Bottom of Fascia
433-1390K
Fascia
Tile or
Marble
Minimum 20 in. (508mm) in front and
8 in. (203mm) on sides to fuel loading doors
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum 4 in. (101.6 mm) Cement Board or
equivalent, (or two 1/2 in. pieces)
and "k" value = 0.49. Micore 300
Fascia
Tile or Marble
Min 20 in. (508mm) in front and 8 in. (203mm)
on sides to fuel loading doors
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 x 4
Minimum 4 in. 101.6 mm)
Cement Board or equivalent, (or
two 1/2 in. pieces) and "k" value
= 0.49.
Micore 300
Fascia
Min 20 in. (508mm) in front and 8 in.
(203mm) on sides to fuel loading doors
Minimum 4 in. (101.6 mm)
Cement Board or equivalent,
(or two 1/2 in. pieces) and
2 x 4
"k" value = 0.49. Micore 300
Combustible Floor
Tile or
Marble
Combustible Floor
3/4 in. (19mm)
Plywood
2 x 4
must be 20 in. (508
Tile or Marble
Non-combustible
framing materials
Combustible Floor
3/4 in.
(19mm)
Plywood
Page 56