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Flush Wall Fire Brick Finish Detail
Recommended Fire Brick Detail: When drywall is
the wall nish at the rebox face and ush with the rough
face of the rebox and damper beam, it is recommended
when installing the required re brick lining to the interior
of the rebox, that the leading edge of the re brick - at the
oor and at the side walls of the rebox - be set ush with the
rough rebox front. This will aid in the overall t and nish
of the replaces front when the code required noncombustible
nished facings are applied.
This alignment of re brick application as shown,
(Figure 35), allows the re brick lining to be in the same plane
with the room’s wall nish surface. With the re brick set in
this fashion the noncombustible nish facing material can be
set tight against the leading edge (or, “room edge”) of the re
brick at the sides of the replace opening. At the same time
the nished facing material can lay at against the room’s
nished wall surface.
Important: Since there is no re brick set along the top of
the rebox opening, when setting the noncombustible nished
facing material (code required and supplied by others) across
the top of the rebox opening there may be a gap between
the back of the noncombustible nish material and the rough
front face of the replace damper beam.
Be sure to check for and ll any such gap with
noncombustible Earthcore Mortar in conjunction with
placement of the code required noncombustible nish facing
material set across the top of the rebox opening. (Figure 36)
WARNING: Avoid false chimneys.
Important: Failure to seal any gaps between the front face
of the damper beam and the back of the noncombustible
nished facing material will create what is known as a “false
chimney”. A “false chimney”, in this case, is the narrow gap
(mentioned above) between the back of the noncombustible
facing material at the top of the rebox opening and the rough
front of the replace damper beam. If left unlled this gap
creates a “false chimney” which can draw smoke, heat and re
out of the rebox into the space behind the noncombustible
nish facing and on up into overhead framed spaces causing
a re hazard.
It is acceptable to apply noncombustible nish
facing to the front and below the rebox opening to create
an arched look, etc. When doing so, make sure to check
for and ll any such gap with noncombustible Earthcore
Mortar in conjunction with placement of the code required
noncombustible nish facing material.
NOTE: You must still keep a minimum 8” from the rebox
opening to any combustible materials.
FIGURE 35
Drywall Flush With
Firebox Front
Noncombustible
Facing Material
1 1/2”
1 1/2”
8”
Min
FILL ANY GAPS
WITH EC MORTAR TO
AVOID FALSE CHIMNEYS
FIGURE 36
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