Essex Chimney Sweeps

Essex Chimney Sweep Articles

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Chimney and Thatch Fires

What causes a chimney fire with reference to thatched properties, particularly when a chimney liner is installed?
  • Having a spark guard or similar on top can cause soot to build up due to sudden cooling and slowing of the flue gasses. Should the cowl get sooty and catch fire it can drop sparks onto the thatch. A spark arrestor cannot be cleaned properly unless removed. Please check with your insurer whether they require you to have one or not.
  • If a chimney liner is installed into a very tarry chimney and the liner is installed in such a way that it comes close to the internal tarry surface of the chimney, the heat from the liner can cause the tar to spontaneously combust causing a chimney fire.
  • If a chimney liner is not swept often enough or properly this can obviously cause a chimney fire.
  • When the heat travelling up the liner goes into the narrowing of the chimney (through the roof), the heat from the liner can be transmitted through the brickwork and out under the thatch. Thatch is an excellent insulator and the heat can increase. This can cause a thatch fire.
  • If register plates are made of combustible material or there is combustible material within the chimney a fire or other dangerous situation can occur.
  • Installing the wrong type of liner for the fuel type being used can cause chimney fires.
  • Burning wet wood in can cause chimney fires due to increased tar / creosote deposits inside the chimney. Use logs with a moisture content of less than 20%.
  • Using the fire to dispose of waste
  • If the flue liner or any other part of the system is installed incorrectly the result can be chimney fire or leakage of poisonous gasses.
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Carbon Monoxide Be Alarmed!

If you suspect that you or someone you know is suffering from carbon monoxide poisoning get urgent medical advice and do not use your appliance until it has been checked by a competent person.

Beware of the silent killer, HSE’s reminder during CO Awareness week
Carbon monoxide awareness
Law and HSE enforcement

Carbon Monoxide and solid fuel

Many people think that carbon monoxide only comes from gas appliances but the truth is that ANY fuel that burns creates carbon monoxide.

By now we should all know that carbon monoxide is a very dangerous, colourless, odourless gas, all appliances installed since 1st October 2010 must have a carbon monoxide detector fitted in the same room.

But for a little better understanding, let’s take a quick trip back to high school chemistry class. The fuels you burn for home heating are mostly compounds known as hydrocarbons (hydrogen + carbon). In your appliance these hydrocarbons are mixed with oxygen and burned to produce heat. When your appliance and chimney are working properly, the fuel is burned more or less completely and the resulting fumes are mainly carbon dioxide (carbon + 2 oxygen atoms) and water vapour. If your appliance doesn’t get enough oxygen, either because the house is too air tight or the chimney isn’t functioning properly, carbon monoxide (carbon +1 oxygen atom) is produced instead. It’s the lack of that one little oxygen atom that causes all the trouble.

What carbon monoxide does to you

Too much carbon monoxide in your blood will kill you. Most of us know we should avoid this. Less well known is the fact that low-level exposure to this gas also endangers your health.

In the body the red blood cells transport oxygen around the body. It can do this because the chemical bonds between the oxygen and the hemoglobin are weak enabling the red cells to easily drop the oxygen where it is needed. Carbon monoxide forms a more permanent bond with hemoglobin which cannot normally be broken and prevents the blood transporting oxygen to the body tissues.

The side effects that can result from this low-level exposure include permanent organ and brain damage. Infants and the elderly are more susceptible than healthy adults, as are those with anemia or heart disease.

The symptoms of low-level carbon monoxide poisoning are so easily mistaken for those of the common cold, flu or exhaustion that proper diagnosis can be delayed. Because of this, be sure to see your doctor about persistent, flu-like symptoms, chronic fatigue or generalized depression.

Why chimney maintenance is important

When fuels burn in an appliance, the fumes that are the by-products of combustion-including carbon monoxide – are released into the chimney. Removing these fumes from the living area is the main purpose of a chimney. In addition to carrying off toxic gases, chimneys also create the draught (flow of air) that provides the proper air and fuel mixture for efficient operation of the heating appliance. Unfortunately, many chimneys in daily use in homes throughout the country either are improperly sized or have conditions that make them unable to perform their intended function.

Chimneys servicing gas appliances need to be cleaned annually

As well as making sure that all gas appliances are serviced annually it is also the landlord’s responsibility to make sure that the flue ways are cleaned annually by a qualified chimney sweep. To help stop the vast amount of people dying each year from carbon monoxide poisoning, the health and safety executive has documentation stating that all gas flues need to be swept annually by qualified chimney sweeps and that this responsibility cannot be passed on to the tenant.

Additional info
Carboxyhaemoglobin % Symptom
0-10 None
10-20 Tightness across forehead
20-30 Headaches
30-40 Severe headache, weakness, dizziness, nausea and vomiting
40-50 Coma, intermittent convulsions
60-70 Depressed heart action, death possible
70-80 Weak pulse, slowed respiration, death likely
>80 Death in minutes.
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Landlord and Tenant advice

Should a chimney fire occur then many thousands of pounds could be lost in damage and loss of earning potential while the house is repaired. Not to mention any claim that a tenant may make.

For a long time Landlords / agents have been unable to put a clause in a tenancy agreement stating that the tenant is responsible for maintaining solid fuel heating systems as this is described as a unfair contract term (Office of fair trading 2005). So you cannot get your tenant to discharge your duty of care for you.

If the landlord looks after a solid fuel appliance then they would have discharged their duty of care towards their tenants and would be keeping their own property safe from unnecessary fire risks and unwanted legal claims.

Remember as a landlord you have a legal duty of care to your tenant/s and as such blocked flues that subsequently cause death could result in the landlord being tried for criminal negligence or in extreme cases a manslaughter prosecution may arise.

Law and HSE enforcement

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