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Don't Neglect Chimney Inspections!


Chimneys are vital to building structures, especially during cold winter months. They help keep the noxious gases produced by a fireplace from coming inside the residence, keeping the inside air clean and safe to breathe. While the chimney is a completely separate structure from the roof, it is important to not neglect its regular inspection and maintenance, as it could easily become a source of dangerous carbon monoxide contamination.

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Why Inspect?

There are plenty of reasons to inspect the chimney. The top end of the structure is basically exposed to various outside elements and the opposite end is constantly exposed to extreme heat, which makes the entire framework more susceptible to damage.

The most common type of damage to occur is cracks, with many different causation factors. Thermal fatigue is one of the most common occurrences. The difference between inside and outside temperatures can cause the structure to crack, creating a passageway for leaks.

The flashing that joins the roof and the chimney can also loosen from thermal expansion of the roofing layers. Even strong winds can cause the flashing to loosen, making it ineffective in the protection it should afford. This could result in leaks around the exterior portion of the structure, allowing water to soak into the underlying roofing layers.

Chimneys are most often used during the cold winter season; however, many things can happen in the interim. A bird could nest inside the flue during the summer months, creating a blockage. Soot could add up over years of use and eventually narrow the passageway, making it ineffective in exhausting harmful gases.

When to Inspect

Most chimneys are made from brick masonry and sometimes cement; a few are made from prefabricated steel. Regardless of what material have been used, it is important to conduct inspections as follows:

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Annually

An annual inspection should be done several months before the winter season beginning so that any repairs can be made with adequate time remaining before when the winter season actually starts. During the months when the chimney is not in use, dirt could have accumulated. Birds have a habit of nesting in the flue, which can cause a partial or even complete blockage. Damage may also have occurred from previous winter's usage and require repairs. An annual examination can help mitigate most of these problems.

Seismic Activity

After an earthquake, it is important to check the chimney for cracks. Even the steel variety should be checked, as it could also be damaged.

Severe Storms

Strong wind and hail can damage masonry and cause gaps in the flashing. Be sure to inspect the exterior of the chimney after every storm to check for any new damage.

Leaking

When evidence of a leak appears on a ceiling, the chimney should be inspected as well as the roof since either could be the source of leaks. A crack may have occurred or the flashing may have loosened, allowing water to seep through into the underlying material.

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Safety Tips

When climbing onto a roof, there is a great risk of falling. When performing a chimney inspection, it would be preferable to do so during clear weather when the roof is not slippery. Wearing rubber-soled shoes for additional traction would be wise as well as having a spotter nearby who could respond immediately in case of a fall. It would also be a great safety precaution to secure a safety line when working on top of the structure. If the angle of the roof is too steep or too high, it is better to leave the job to a professional contractor.

Chimneys are a vital part of a building structure and should never be neglected.