No wood burning system is 100% safe and fire-proof. A safe installation and extra care help prevent fire, but accept the idea that there could be a fire, and be prepared to handle it. Chimney fires are most likely to occur during a very hot fire, as when cardboard or Christmas tree branches are burned or even when a stove burns normal wood but at a higher than normal rate.
Make certain everyone in the house is familiar with the warning signs of a chimney fire --- sucking sounds, a loud roar and shaking pipes. Instruct everyone on what to do in case of fire. Practice fire drills and instruct all adults on how and when to use a fire extinguisher. Put the fire department phone number in an obvious place near the phone.
If you have a chimney fire:
a) Call the fire department immediately.
b) If all the stove pipe joints are tight and no other appliance is connected to the same flue, close all openings and draft controls if you have an air-tight stove. Close the stove pipe damper in a non-air-tight stove.
c) You can attempt to cut off the air supply to a fireplace by using a wet blanket or sheet metal to seal off the fireplace opening. Be careful since a strong draft can make this difficult and dangerous. Use only non combustible materials.
d) If you have a leaky stove or fireplace you may have to wait for the fire to burn out.
e) Get everyone out of the house, and put them to work watching for sparks or signs of fire on the roof or nearby. One adult should stay in the house to check the attic and upper floors for signs of fire.
f) Discharge a class ABC dry chemical fire extinguisher or throw baking soda into the stove or fireplace if the chimney is not sound or there is a danger of the house or surroundings catching on fire. The chemical travels up the chimney and often extinguishes the flame.
g) Throwing water in a stove will cause the metal to warp, but if it's a choice between the house or the stove, use water.
h) Check the chimney after a fire. A chimney fire can range from 2000 to 3000 degrees F which is hot enough to cause deterioration of metal or cause masonry to weaken. Metal chimneys can deteriorate after 2 or 3 fires.
i) If a chimney fire occurs once, chances are that it will occur again. Find the cause.
A problem with frequent chimney fires is the possibility of the framing catching on fire. The ignition temperature of new house framing is about 500 degrees F. Over a period of years, as this wood is repeatedly heated by chimney fires, the wood will ignite at a much lower temperature.