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Earthcore Industries
01/2020
Isokern Maximus Linear Series Gas Fireplace
Firebrick Installation - General Information
The manufacturer requires for the Maximus Linear Series fireboxes be lined with a minimum one and one-eighth (1-1/8”)
thick firebrick for the Backwall and Sidewalls and 2-1/4” thick firebrick on the Floor.
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.
ISOSET FIREBRICK MORTAR APPLICATION:
• Add .75 quarts of water per 10 lbs of dry product until completely blended.
• Only mix what can be utilized within 15 minutes.
• Do not re-temper (the addition of water after the chemical reaction has begun).
• The use of warm water will accelerate setup.
• Joint thickness should be thin (1/4”- 3/8”)
• Complete set time is between 48 and 72 hours.
• For best results, please allow 28 days before heat is applied.
• Approximately 35 to 40 lbs of prepared mortar will lay up one hundred
9 x 41/2 x 21/2” straights.
•
DO NOT
add additives, such as fire-clay, 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
installing firebrick. Keep the fireplace damp while installing firebrick.
For Best Results:
•
After wetting sponged interior of firebox, apply a 1/4 notch bed joint on rear sides and floor
•
Dip each firebrick in a pale of water before applying mortar to one side for adherence to firebox.
2.
Facing joint dimensions of 1/4” 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.
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.
