Why Is My Chimney Leaking?

Even when the weather is sunny and warm, attention to chimney maintenance is critical. Chimney leaks are a common problem for homes in Georgia and South Carolina due to our humid climate and frequent rainfall. This moisture can seep into the chimney through the tiniest cracks in the masonry, the flashing, or the crown. Several issues can cause chimney leaking, but the following are the five most common in the Central Augusta River Area and South Carolina Midlands:

Missing or Damaged Chimney Cap

The chimney cap is a metal covering that sits on top of the chimney and helps to protect it from water and debris. Water can leak into the fireplace if the cap is missing or damaged. As the water drips down the sides, it can damage the interior masonry, flue liner, and firebox. This increases the fire risk and exposure to toxic carbon monoxide fumes, rendering your fireplace or stove unsafe.

Cracks In the Chimney Crown

The chimney crown tops the entire masonry chimney structure and is designed to deflect water away from the sides of the masonry like an umbrella. When the porous crown develops cracks, water can seep inside the chimney, damaging the interior masonry and components. A crown sealant will seal small cracks. But if the damage is severe, the crown may need rebuilding to stop the water leak. A custom chimney cap will help protect the crown, prolonging its lifespan and minimizing chimney leaking.

Deteriorating Brick-And-Mortar Joints

The bricks and mortar holding the chimney stack together can become worn and damaged due to years of exposure to weather and environmental conditions. Water can seep into the crevices as the mortar decays, causing further damage to the surrounding bricks and mortar. Eventually, the missing mortar can cause the bricks to become loose and fall off the chimney. It can lead to water leaking into the chimney, which can cause more damage to the entire venting system.

Faulty Flashing

Flashing is the sheet metal that seals the joint between the chimney and the roof. When the flashing is installed improperly, rusting, or damaged, water can seep through the gap into the chimney, ruining the walls, ceiling, attic, and roof deck. Flashing damage is often mistaken for a roof leak.

Rusting chase cover

A chimney chase cover is a metal cap on top of a manufactured chimney chase, like a flue cap covering a masonry chimney. Its purpose is to prevent water from entering the chimney and damaging the flue, firebox, and venting system. However, when the chase cover has damage like corrosion or rust, it can no longer effectively protect the chimney from leaking water.

How Do I Stop My Chimney from Leaking?

If you think your chimney may be leaking, a Certified Chimney Professional® can identify the source and make the necessary repairs to stop the leak. In many cases, the repairs can be made relatively quickly and easily. However, if the damage is extensive, you may need to have the chimney rebuilt.

Advanced Chimney Sweep is your local professional for everything chimney, including inspection, leak detection, and repairs in the Central Augusta River Area and South Carolina Midlands regions, including Augusta, GA; Martinez, GA; Belvedere, SC; and Graniteville, SC. Call (803) 508-3990 or (706) 833-4630 today to schedule an appointment, or contact us online.