What Are Ways to Keep Moisture Out of My Chimney?

What Are Ways to Keep Moisture Out of My Chimney?

August 7, 2023

What Are Ways to Keep Moisture Out of My Chimney?

Chimneys are an important part of a home’s heating system, allowing smoke and other combustion byproducts to safely exit. However, they are also susceptible to moisture-related issues, which can cause damage and reduce the efficiency of the chimney. To keep moisture out of your chimney and maintain its performance, here are some helpful strategies to consider.

1. Install a Chimney Cap

A chimney cap is an essential component that sits atop the chimney and acts as a barrier against outside elements, including rain, wind, and debris. It prevents water from entering the chimney flue, preventing moisture damage. A chimney cap is relatively inexpensive and easy to install, making it a crucial first step in keeping your chimney dry.

2. Regularly Inspect and Repair the Chimney Crown

The chimney crown is the top portion of the chimney that covers the chimney stack. It plays a vital role in keeping water out of the chimney. Regularly inspect the crown for any cracks, gaps, or signs of deterioration. If you notice any issues, hire a professional chimney sweep or mason to repair or replace the crown to ensure its effectiveness and prevent water infiltration.

3. Check and Repair Flashing

Chimney flashing is the metal strip or sheet that seals the joint between the chimney and the roof. Over time, flashing can deteriorate, leading to leaks and moisture penetration. Inspect the flashing regularly for gaps, rust, or other signs of wear and tear. If any problems are found, hire a professional to repair or replace the flashing to prevent future moisture-related issues.

4. Waterproof the Chimney

Applying a waterproof sealant or coating to the exterior of the chimney can provide an additional layer of protection against moisture. Waterproofing products are available specifically designed for chimneys and can help repel water while still allowing the chimney to breathe. Before applying any waterproofing product, make sure the chimney is clean and free of dirt, debris, and loose mortar.

5. Keep Gutters and Downspouts Clean

Clogged gutters and downspouts can lead to water overflow, which can eventually find its way into the chimney. Regularly clean and maintain your gutters to ensure water is effectively directed away from the chimney. Consider installing gutter guards to prevent debris buildup and minimize the need for frequent cleaning.

6. Create Proper Ventilation

Good ventilation is crucial for keeping moisture out of the chimney. Proper airflow helps to prevent condensation and the buildup of moisture inside the flue. Ensure that there is enough space around the chimney for adequate ventilation, and avoid blocking any vents or openings in the chimney structure.

7. Remove Trees and Branches near the Chimney

Trees and branches in close proximity to the chimney can drop leaves and debris, which can block the chimney cap and impede proper airflow. Additionally, branches can rub against the chimney during windy conditions, causing damage to the structure. Trim back any trees or branches to keep them a safe distance from the chimney and reduce the risk of moisture-related issues.

8. Schedule Regular Chimney Inspections and Cleanings

Regular chimney inspections and cleanings are essential to maintaining its performance and preventing moisture-related issues. Hire a professional chimney sweep annually to inspect and clean the chimney, removing any creosote buildup or obstructions that could contribute to moisture problems. A professional can also identify any potential issues early on and recommend appropriate repairs or maintenance.


Keeping moisture out of your chimney is vital for its longevity and efficiency. By implementing these strategies, such as installing a chimney cap, inspecting and repairing the crown and flashing, waterproofing, maintaining proper ventilation, and scheduling regular inspections and cleanings, you can protect your chimney from the damaging effects of moisture. Maintaining a dry and functional chimney not only ensures the safety of your home but also contributes to energy efficiency and reduces the risk of costly repairs down the line.

Got Questions? Let Us Help!

Alaska Fire and Flue LLC has been serving Eagle River and the Mat-Su Borough since 2005 and recently opened a 2000 sq ft showroom at 6445 Blue Lupine Dr in Palmer. We are your full-service dealer for wood stoves, fireplaces, chimney, and all the accessories to keep you burning wood all winter. Come see us today for your new heating system or just to ask any technical questions that you may have. At Alaska Fire and Flue LLC, we carry a diverse range of stoves to meet your heating needs. Come into our showroom and view our gas, pellet, Toyo, oil, and wood burning stoves. We are committed to providing top of the line service and repair for any type and style of stove, chimney, and fireplace. Contact us today to learn more about what we can do for you!

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