22
Finish Facing Detail
Important:
Since there is no fire brick set along the top of the STANDARD’s firebox opening, when setting the noncombustible
finished facing material (code required and supplied by others) across the top of the firebox opening there may be a gap between the
back of the noncombustible finish material and the rough front face of the STANDARD damper plate.
Be sure to check for and fill any such gap with noncombustible Earthcore Mortar in conjunction with placement of the code required
noncombustible finish facing material set across the top of the firebox opening. (Figure 35)
WARNING
:
Avoid false chimneys.
Important:
Failure to seal any gaps between the front face of the STANDARD damper plate and the back of the noncombustible
finished 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 firebox opening and the rough front
of the STANDARD damper plate. If left unfilled this gap creates a “false chimney” which can draw smoke, heat and fire out of the
firebox into the space behind the noncombustible finish facing and on up into overhead framed spaces causing a fire hazard.
FIGURE 35
