Common Chimney Problems And How To Fix Them!

In this guide, we will be providing insights into the most prevalent issues encountered during chimney repair and effective solutions for addressing them.

Chimney's Flashing

To safeguard your home from potential water damage, conduct a thorough examination of your chimney’s flashing. Look out for signs of trouble such as loose, missing, cracked, or damaged flashings. Seal all seams and gaps diligently. Should you encounter deteriorated flashing, promptly replace or repair it using a top-quality elastomeric flashing sealant.

Examine Your Bricks and Mortar Joints

Preventing major repairs starts with addressing minor issues as they arise. Regularly inspect for loose bricks, cracked surfaces, or chipped bricks (spalled). If you notice loose bricks or a multitude of cracked or chipped ones, it’s imperative to engage a seasoned brick mason or a chimney sweep specialized in repair work. For minor cracks (up to 1/8″ wide) in bricks that remain secure, opt for brush-applied crack filler. The same applies to loose or missing mortar joints. Consult with a professional to assess the need for tuckpointing, the replacement of mortar joints. Any minor cracks in sound mortar joints can be easily sealed using the same brush-applied crack filler.

Check Masonry For Water Intrusion

After making necessary repairs and sealing cracks, perform a water test on your chimney. If the surface darkens quickly, and water absorbs into the masonry within seconds, your chimney remains vulnerable to ongoing water damage. Apply a high-quality, breathable water repellent specifically designed for masonry chimneys. Breathability is crucial, as conventional water sealers might trap moisture within the chimney, leading to further harm. Before applying the water repellent, remove any unsightly stains using masonry cleaners known to be safer alternatives to strong acids typically used for this purpose. Always follow label instructions and safety precautions when handling chemicals.

Check Your Chimney's Crown

The crown, or the mortar or concrete on top of your chimney, serves as its roof. In cases of loose or missing pieces, it’s advisable to seek professional guidance. If the crown exhibits cracks but remains structurally sound, consider using a flexible, brush-applied crown repair solution to prevent water damage and potential leaks.

Check Your Chimney's Interior

With a powerful light source, inspect the interior of your chimney for obstructions, combustible creosote, or soot deposits. However, it’s important to note that this task is best left to certified chimney sweeps, as they possess the expertise to identify complex issues. The National Fire Protection Association recommends annual evaluations for chimneys, stacks, and vents. Unsafe chimneys are responsible for numerous injuries, fatalities, and substantial property damage each year. Locate a certified chimney sweep through the Chimney Safety Institute of America’s website at

Invest in a Chimney Cap

Lastly, consider installing a chimney or flue cap to cover the flue opening. These caps act as barriers, preventing animals, debris, and water from infiltrating your chimney. Opt for chimney caps constructed from stainless steel or aluminum for resilience against rust and lasting protection.

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14199 N Interstate Hwy 35

Pflugerville, TX


557 South IH 35  Service Drive, Suite 101B 
Georgetown, TX



2 Mockingbird Cir, 
Houston, TX

CSIA Certified Chimney Sweep
CSIA Certified Chimney Sweep

Houston, TX | Austin, TX | Georgetown, TX

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