FIREBRICK FLOOR
AND BACKWALL
(BUILT FIRST)
1/2” EXPANSION
GAP
(BOTH SIDES)
FIREBRICK FLOOR
AND BACKWALL
(BUILT FIRST)
16
Assembly Instructions - Fire Brick Installation
Fire Brick Installation:
The manufacturer requires that the STANDARD
Series fireplace firebox be lined with a minimum one and one-
eighth (1-1/8”) thick rated fire brick. The pattern for the fire
brick lining is an owner option. Standard N-Type brick mortar
is a suitable fire brick mortar for the Standard fireplace and
good masonry practices should be followed.
All required through-wall accesses (gas and electrical
line feeds and combustion air supply access holes) should be
drilled before the required fire brick lining is installed.
It takes a total of about five gallons of N-Type brick
mortar mix (dry measure) to fire brick line a STANDARD
fireplace.
Face joints of one quarter inch (1/4”) to three-eights
inch (3/8”) give a good appearance to the finished brickwork
however, this is just a suggestion and other face joint
dimensions are also acceptable.
Step 1. Wet mop the inside of the STANDARD fireplace with
a damp sponge to remove dust and loose particles from the
interior before installing fire brick.
Step 2. Start the fire brick at the front edge of the floor of the
Isokern firebox, proceeding inward toward the back.
HINT:
Dip each firebrick into water before applying.
Step 3. Next, apply fire brick to the back wall of the unit start
-
ing at the bottom of the back wall and working upward to the
top of the back wall.
Step 4. Finally, set the side wall fire brick by starting at the
front edge of the unit’s side wall and working inward toward
the back wall fire brick.
Isokern makes no claims as to the performance
of fire brick or fire brick mortar(s). It is typical for heat
stress cracks to appear in the fire bricks in wood burning
fireplaces.
FIGURE 23
FIGURE 22
FIGURE 21
