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The duct is an essential element of a chimney. Its role is not only to evacuate the smoke but it also helps prevent fires or poisoning by smoke. To ensure that the chimney flue works optimally, a check must be carried out regularly.

Checking and control of the chimney

Checking and control of the chimney

Control of the chimney

Checking and control of the chimney flue is carried out both for economic purposes and for security concern. He is supported by a chimney sweep specialist. This check may be performed at the same time as the annual (or biennial) chimney sweeping of the chimney.

The operation is done in three main stages:

1- The professional conducts a recognition of the chimney

2- He then checks emptiness as well as sealing of the device. For this purpose, he uses a fumigant. It carries out beforehand a series of interventions (sweeping, obstruction of the bottom and the top of the conduit...) This control aims to know the state of the flue.

3- After this smoke test, the professional gives his advice as part of a rehabilitation and before use of the chimney.

Why carry out this check?

Checking a chimney flue is essential in many ways. First, this step makes it possible to detect a possible obstruction. It can especially be a nest of birds or other. The fact that a duct is clogged increases the probability of accidents.

The verification also makes it possible to detect the presence of cracks and to ensure a perfect tightness of the duct, essential to avoid the risks of carbon dioxide poisoning. In all cases, the professional who is in charge of the control ensures that the evacuation is done correctly and that there is no refoulement of fumes.

How is the operation?

In general, the verification and control of the chimney flue uses a smoke cartridge which is placed at the base of the duct. In this way, it is possible to detect any leakage along the length of the conduit.

The first step is to plug the duct by closing the chimney stump at the roof level (thus preventing smoke from coming out). Once the stump is closed, the professional installs himself at the base of the duct. In order for the smoke produced by the smoke to penetrate perfectly into the duct, the specialist creates a rising draft, making a small fire (with some papers for example).
He can then light the smoke before quickly blocking the entry of the duct. The verification can then start. When the smoke test is complete, the upper part of the duct is "released" to evacuate the smoke. Then the base is also uncorked.

Any verification and control of the chimney flue must be carried out by a professional who has the necessary equipment and skills to carry out this regulated procedure.


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