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A Complete Guide to Chimney Damper Repair and it’s Cost

A chimney damper is an important component of a fireplace that helps regulate the airflow and prevent heat loss when the fireplace is not in use. It’s a metal plate or valve that sits at the top of the chimney and can be opened or closed to allow or restrict the passage of air.

How to tell if the chimney damper is open or closed?

Knowing whether your chimney damper is open or closed is essential for maintaining proper airflow and ensuring the efficient functioning of your fireplace. Here are some ways to tell if your chimney damper is open or closed:

Use a damper handle:

Some chimneys have a damper handle that allows you to open or close the damper from inside the fireplace. If you can see the handle, you can easily determine whether the damper is open or closed by its position.

Check the temperature:

When the damper is open, the temperature in the room will be closer to the outside temperature. If you feel a draft, it’s a sign that the damper is open. However, if the room feels significantly warmer, it’s a sign that the damper is closed.

Use a smoke test:

Another way to determine whether the damper is open or closed is by performing a smoke test. Light a small piece of newspaper and hold it up near the damper. If the smoke is drawn up into the chimney, the damper is open. If the smoke remains stationary, the damper is closed.

Listen for sounds:

When the damper is open, you will hear the sound of the fire crackling and the flames flickering. If the damper is closed, the sound will be muffled, and you may not hear the fire at all.

How to repair a chimney damper?

Repairing a chimney damper can be a challenging task, especially if you don’t have experience working with chimneys. Here are some steps that you can follow to repair a chimney damper:

Identify the type of damper:

There are different types of dampers, including throat dampers and top-mount dampers. The type of damper you have will determine the repair process.

Inspect the damper: Look for signs of damage, such as rust, corrosion, or warping. Make sure the damper is functioning properly by testing it.

Clean the damper: Remove any debris, soot, or creosote buildup from the damper. Use a brush or vacuum to clean the damper thoroughly.

Repair or replace damaged parts: If the damper is damaged, you may need to repair or replace some of its parts. For example, if the damper hinge is broken, you can replace it with a new hinge.

Install the damper: Once you have repaired or replaced any damaged parts, reinstall the damper. Make sure it is properly secured and functioning correctly.

Test the damper: Finally, test the damper to make sure it is working correctly. Open and close the damper to ensure it is sealing properly and that it is opening and closing smoothly.

How much does it cost to repair a chimney damper?

Chimney damper repair costs can vary depending on the extent of the damage and the type of repair needed. If you can repair it yourself, the cost may be minimal to the cost of replacement parts, depending on the type of damper and the extent of the repair needed. In general, homeowners can expect to pay between $150 and $500 for a standard chimney damper replacement.


One of the most significant factors that affect the cost of chimney damper replacement is the type of damper. There are several types of dampers, including top-mount, throat, and chimney cap dampers. Top-mount dampers are typically the most expensive, with prices ranging from $250 to $500. Throat dampers are less expensive, with prices ranging from $150 to $250. Chimney cap dampers are the least expensive, with prices ranging from $50 to $150. The cost of the damper will depend on its features and the manufacturer.


Another factor that can affect the cost of chimney damper replacement is the size of the chimney. Larger chimneys may require larger dampers, which can increase the cost of the replacement. Additionally, the location of the home can also impact the cost. Labour costs can vary depending on the region and the availability of qualified professionals.

It’s important to keep in mind that chimney damper repairs are important for the safety of your home and family, and it’s often worth the investment to have a professional handle the repair to ensure it is done correctly and safely. Be sure to get multiple quotes from reputable professionals before deciding on a 

chimney damper replacement cost and service, and be aware of any estimates that seem unusually low, as this may indicate a lack of proper knowledge or the use of lousy resources.

It's a messy job, calls the pros

It is advisable to call a professional for the repair of the chimney damper for several reasons:

Safety: Chimney dampers are typically located at the top of the chimney, which can be a dangerous place to work. A professional chimney technician has the necessary safety equipment, training, and experience to work on your chimney damper safely and avoid accidents.

Expertise: Chimney dampers are complex components that require a deep understanding of the chimney system. A professional chimney technician has the knowledge and expertise to diagnose the problem accurately and provide an effective solution.

Cost-Effective: Attempting to do a chimney damper replacement on your own can lead to further damage or even injury, which can be costly to repair or treat. Hiring a professional chimney technician can save you money in the long run by preventing further damage and ensuring that the problem is fixed correctly the first time.

Efficiency: A professional technician has the necessary tools and equipment to repair the chimney damper efficiently. This can save you time and effort, as they can get the job done quickly and effectively.

Warranty: Most professional chimney companies offer a warranty or guarantee on their work, giving you peace of mind that the job will be done right. This protects your investment and ensures that any issues that arise after the repair will be taken care of by the company.

Calling a professional for the repair of a chimney damper is the safest, most cost-effective, and most efficient option to ensure that your chimney system is working correctly and safely. Chimney damper repair cost is always a good factor to consider without any second thought.