Chimney Doctors' Homeowner's Guide

• "Smoke chambers lined with firebrick must be at least 6 inches thick if not 8 inches thick"
• "Smoke chamber height shall not be greater than the inside width of the fireplace opening"
• "Smoke chamber depth shall not be greater than the depth of the fireplace fire chamber"
• "Inner surfaces of the smoke chamber shall be smooth and not inclined more than 45° from vertical"

• Hard starting and smokey until draft is established
• Smoke problems
• More susceptible to draft flow reversal due to cooling of flue gases
• Creosote generates and condenses to smoke chamber walls
• Combustible material in contact with exterior of smoke chamber
• Harder to clean

• Seals holes and gaps; creates a durable coating to acids, vapors, water, and temperatures up to 30000P
• Smoothes smoke chamber without removing damper frame or any brickwork
• Improves operation of fireplace, increases safety
• Material sticks to any masonry
• Easy to clean
• Easier, faster, and much more cost effective that other method
• Reduce air turbulence and improve flow capacity of the fireplace
• Often corrects mild smoke problems and odors
• Reduce creosote formation by keeping smoke warmer
• Can be built up to any thickness