If it is burning in the chimney. The three most common fire causes, tips on chimney fire, soteld and first action if it burns in your chimney.

Chimney fire, if it burns in the chimney

Chimney fire, if it burns in the chimney

Chimney fire, or soteld as you say, may appear to be less dramatic and dangerous than other types of fires. But unfortunately it is not. When soot and tar rock in the chimney catch fire, flames can spread rapidly indoors to surrounding wood constructions and outdoors to ceilings, trees and shrubs. Even ground fires can occur.

In case of a fire, temperatures up to +1 200oC can be developed. What a heat it may be, you first understand when you know that a chimney is usually designed for a maximum flue gas temperature of + 350oC. Additionally, the firepiles that break out of the chimney at a silt can be 2-3 m high, under unfortunate circumstances even higher. Against this background, it is easy to understand what serious consequences a chimney fire can have and that it is obvious that the fire brigade is as soon as possible. In contrast to many other fires, it is also necessary to understand the importance of trying to prevent the spread of the fire.

The main reason for this is that fires are most common in forest-rich sparsely populated areas, where the escape routes of the fire brigade are often both long and difficult. You must therefore assume that it may take a while before professional firefighting is in place. During the waiting period, it is important not to put your hands in the pants and wait.

For example, if you have a cardboard box, it's easy that the fire gets stuck in this and it blows when a multi-meter high flame curls the chimney, Flames and spark showers can quickly be thrown over to surrounding buildings and trees. In such situations it is important that you have effective extinguishing tools readily available. Your own roof can be protected by means of the garden hose, ie if the water pressure is high or you can connect the hose to a nozzle that causes the water jet to reach the roof.

The first action if it burns in the chimney

1 . Alarmer fire brigade by calling 112. Answer calmly and sensibly on the questions you receive.
2. Close any gaps and damper to reduce oxygen supply.
3. Clean up around the house so that the firefighter can easily come up and get up on the roof of the house.
4. Spray water or foam on fire heats that can occur around the chimney - inside out.
5. Beware any fireplaces on the roof of the house and nearby ceilings. Water spray and spray gun even these.
6. Trees and shrubs nearby, as well as surrounding dry land, may also be in danger zone.

The three most common fire causes

As soon as we burn with solid fuels, such as firewood or wood chips, the risk of fires increases, especially fires. Therefore, statistics also show that elevated rates on oil and electricity are reflected in an increasing number of fires.

Fireboxes arise for many reasons, often with clean fissure, but in the case of fires,
are three main causes:
1. Lack of ignition technology.
2. Incorrectly constructed fireplaces and smoke ducts.
3. Bulk or ignorance of the rules applicable to the installation of fireplaces.

If you do not burn properly, the combustion is poor and results in something called "poor efficiency" in the trade language. This results in, among other things, health hazardous emissions and tar formation in the chimney, which soon or later ends with a chimney fire.

One of the most important fires is therefore to always fire with dry wood. Because such wood does not have more than about 20 percent moisture content, it does not cause combustion problems and hence no saucers. If, on the other hand, a boil on the fresh air is used, which usually has a 70 percent moisture content, the combustion is so bad that there is a tar formation in the smoke duct. It's like ordering a saucepan.

When talking about malformed facilities, there is no need for a direct construction error. For example, most double boilers are primarily intended for oil fire, but can also be burned with wood-but only if the flue gas duct is dimensioned for it. In the event of oil fires, the flue gas temperature will normally be 200-300 oC. It is then common for the chimney to have a construction that exceeds this temperature at about 50oC.

However, this margin is not sufficient for wood burning, as this fuel can raise the flue gas temperature to 800 oC. In order to prevent such deficiencies, the building standards give a clear indication of what is happening when building or installing fireplaces and smoke ducts.

The illustration shows the acceptable chimney height above the roof of a typical house that is heated with a standard wood pan with a heat output of not more than 60 kW .

Worth knowing

When burning firewood in a wood pan, dry fuel should be used and kept within a safe distance from the fireplace. The fuel amount should be adapted to the boiler and heat demand. In order not to risk soteld you should sow the entire plant every five weeks. You should preferably use the electricity bill every week. You should take out the ashes every day.

It is popular and quite easy to install wood burning stove and independent fireplaces that can be directly connected to a smoke duct. Just remember that you have to comply with certain minimum requirements for so-called protection distances for different wall and ceiling materials. The beam layer must also withstand the weight of the fireplace and the smoke duct and you should choose type-approved fireplaces. Building law is always required. A new fireplace must not be used until the installation has been inspected and approved.


Never cook with fresh or for some other reason. Keep well in the stove and let the fire burn out before refilling with new fuel. Gather a good glow bed before closing the damper. Otherwise tar is deposited both in the fireplace and in the chimney. The tar is stored while soot is filled with other combustible substances. When the damper is then opened for a fire, there is a risk that the soot deposits will ignite. Garbage, especially plastic waste, can form flammable substances in the flue gas and contribute to soteld.


There are two ways to perform a chimney sweep. If the chimney is sufficiently spacious inside, you can insert a steel tub. If it is too tight you can seal and surface with refractory use. Regardless of method, isolation is required.

Video: Honey wake up, we got a chimney fire!|