EarthCore 80B36 Installation, operation, maintenance and owner's manual - Firebrick Installation
23
Earthcore Industries
08/2017
BVETTO B-Vent Gas Fireplace
The manufacturer requires that the fireplace fireboxes be
lined with a minimum one and one-eighth (1-1/8”) thick
firebrick for the Floor, Backwall and Sidewalls. Thicker
firebrick may be used as an option. The pattern for the
firebrick lining is an owner option. The ISOSET mortar by
Earthcore is to be used when lining the Isokern Fireplace.
The ISOSET Firebrick Mortar Application:
• Add .75 quarts of water per 10lbs of dry product until
completely blended.
• Only mix what can be utilized within 15 minutes
• Do not retemper (the addition of water after the
chemical reaction has begun).
• The use of warm water will accelerate setup
• Joint thickness should be thin (1/16”-1/8”)
• Complete set time is between 48 & 72 hours.
• For best results, please allow seven days before heat
is applied.
• Approximately 35 to 40 lbs of prepared mortar will
lay up one hundred 9x4½x2½” Straights.
• DO NOT add additives such as fireclay, sand,
cement, or other accelerators.
These instructions may vary because of different
climates and conditions. The use of good masonry
practices for your area should also be considered.
Installation Instructions:
1. Wet mop the inside of the fireplace with a damp sponge
to remove dust and loose particles from the interior before
firebricking.
For Best Results:
1. After wet sponged interior of firebox apply a 1/4
notch bed joint on rear sides and floor.
2. Dip each firebrick in a pale of water before applying
mortar to one side for adherence to firebox.
2. Face joint dimensions of 1/8” to 3/8” in the brick work
is recommended and has the best appearance. Other face
joint dimensions are acceptable however smaller joints
may not leave room for heat expansion of firebrick.
3. Start the firebrick at the front edge of the floor of the
Isokern firebox, proceeding inward toward the back. Let
the floor brick gap approximately 1/2” off the back wall
and side walls. This air space allows heat expansion of the
firebrick and is to be left empty of mortar. (Figure 24)
4. Next, apply firebrick to the back wall of the unit. The back
wall firebrick covers the 1/2” expansion gap left at the brick
floor along the back wall of the firebox. (Figure 25)
5. Set the side wall firebrick by starting at the front edge
of the unit’s side wall and working inward toward the back
wall firebrick. The side wall firebrick, when completed,
Firebrick Installation
Expansion
1/2” Gap
Expansion
1/2” Gap
Fire Brick Floor
(Built First)
No Gaps
Fire Brick Floor
and Back Wall
(Built First)
FIGURE 24
FIGURE 25
FIGURE 26
covers the 1/2” expansion gaps where both the floor
firebrick and the back wall firebrick were held off the units
side walls. (Figure 26)
All required through-wall accesses (gas and air intake
supply access holes) should be drilled before the required
firebrick lining is installed. Do not cover these areas with
firebrick.
Earthcore makes no claims as to the performance
of firebrick or firebrick mortar(s). It is typical for heat
stress cracks to appear in the firebrick in fireplaces.