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The Daily Insight

How much does it cost to replace a chimney damper

Author

Andrew Mitchell

Published Apr 21, 2026

The average cost to repair or replace the damper in your fireplace or chimney is around $60 for damper door replacement only, with DIY installation. If the frame needs to be replaced as well, plan on $350-$400 and a Pro to do the job.

How much does it cost to replace a flue damper?

Fireplace Damper Cost and Installation A chimney cap damper costs around $200 to $300, not including the screened chimney cap, which runs between $90 and $120. Professional installation of a new damper will likely run around $200 to $400 for labor, in addition to the cost of the new damper itself.

How do you fix a broken fireplace damper?

  1. Remove Debris. Start by cleaning debris and creosote from the damper before removing it. …
  2. Remove the Damper Plate. …
  3. Clean Everything. …
  4. Replace the Damper Plate.

Can a fireplace damper be replaced?

A damper must be in one piece that is snug to the flue in order for it to work properly. … Replacing a fireplace damper by yourself is possible, and you can save yourself some serious money by foregoing professional consultation.

How much do dampers cost?

The cost for a new motorized damper can range anywhere from $100 to $200. The installation process will take a contractor around two hours and will bring between $150 and $250 in labor costs.

How do you get rid of old damper?

You can go about removing the frame in several ways. You could either remove the frame by cutting out the metal, or loosening the mortar around the bricks around the frame. If your frame is cast iron, using a hammer will sometimes shatter the frame.

Is a damper the same as a flue?

A damper is located in the flue of your chimney. The flue is where the smoke escapes when the fire is going. Dampers are placed inside of the flue to help control ventilation. Your damper should have a chain or handle that you can access in order to open and close it.

How much does it cost to install a fireplace flue?

TypeCost Per Linear FootSingle Flue$100 – $300Double Flue$200 – $400

How can I tell if my damper is open?

Feel for a Draft Before lighting a fire, you can tell if the damper is open by placing your hand into the fireplace. If you feel a draft coming down the chimney, it is a good indicator that the damper is open. If you don’t feel any cold air coming down the chimney, it means that the damper is closed.

Do you need a flue damper?

Flue dampers are required on double door stoves when burned with doors open and screen in place. The damper then becomes your only control to slow the fire. It’s good to have one on any stove in case while loading you get a log stuck and can’t shut the door right away while you fight it.

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Where is fireplace damper?

What is a fireplace damper? Think of a chimney damper like a lid for your fireplace. It is located in the flue, which is the air shaft through which smoke and air can travel in and out of your chimney, and is located above the firebox where the fire is made, and is in use both when fireplace is active and inactive.

How do you open a stuck chimney damper?

If the prior two steps don’t cure the stuck damper handle, tap the handle with a sledge hammer after applying WD-40 to the part of the handle that is inside the fireplace. Once you have the damper opening and closing easily, apply some high temperature lubricant to the hinges and you’re done.

How much does it cost to install a stainless steel chimney liner?

The average cost of a stainless steel chimney liner is around $1,980 when installed by a local chimney professional. For do-it-yourself homeowners, expect to pay around $625 for a ready to install, 6″ x 25′ foot flue liner kit and DIY installation.

How much is a fireplace insert?

How much does a fireplace insert cost? Most fireplace inserts and a professional installation cost about $2,000 to $4,000, depending on the state of your existing chimney and the model you select. Some electric models cost significantly less, but they offer less heat output than wood and gas fireplace inserts.

How do I know if my damper is bad?

Manual Control Damper Then, check to see whether the airflow has stopped in the registers. Flip the damper into an open position and inspect the registers once more to see if airflow begins. You probably have a bad damper if, when the damper is closed, you feel limited airflow or none at all.

How often should dampers be replaced?

Some shock absorber manufacturers say you should replace them at 50,000 miles, but that’s more for their benefit than yours. Having the shocks and suspension parts inspected at 40,000 or 50,000 miles, then annually after that, is a better idea.

What is a chimney damper?

A chimney damper prevents conditioned (warmed or cooled) house air from escaping through the flue when you‘re not using the fireplace. You need to open the damper when you start a fire to allow for proper airflow and let the smoke out.

How much does it cost to open a fireplace damper?

The damper should be kept open until all embers are finished burning to prevent smoke from escaping into the home. When the fireplace is not in use, the damper should always be closed. An open damper is like an open window, allowing large amounts of heat from the home to escape.

Do all chimneys have a damper?

Every Fireplace has a chimney damper. This is a movable plate that sits above the fireplace before the flue. If you pull the lever toward you, generally that will open most of the dampers. When the damper is closed, it helps to keep heated air from going up the chimney.

What is another name for a damper on a fireplace?

The damper, or flue damper, is a small device inside of the flue.

How do you clean a chimney damper?

Hold the damper over the newspapers and scrape it with a wire brush to remove the large chunks of soot. Fill a gallon bucket with 6 tbsp. of TSP cleaner, 1 cup of bleach and 1 gallon of warm water. Dip the scrub brush in the mixture and gently scrub the front and back of the damper to remove all the soot.

How much does it cost to close a damper?

Close the damper about two-thirds of the way as the fire begins to catch and coals start to form. As the chimney warms and the airflow increases, it pulls more heat upward and out of the chimney. This flow heats the coals and pushes air through the wood, increasing the heat.

How do you adjust a chimney damper?

  1. Open the fireplace damper all the way when starting a fire.
  2. Let the fire burn for a few minutes then adjust the damper so that it is partially closed (about half way) to see how it affects the fire.

How much does a flue cost?

National Average Cost$2,500Minimum Cost$625Maximum Cost$7,000Average Range$1,500 to $4,000

How much does it cost to have a chimney built?

A traditional masonry chimney can cost between $100 and $200 per linear foot to install. Engineered chimneys are slightly more affordable at a cost of $60 to $100 per linear foot. That means that the average cost for a 10′ chimney can range from $1,000 to $2,000 or $600 to $1,000, respectively.

Does a chimney add value to a house?

Return on Investment A homeowner can often recover over 100 percent of the expenses associated with adding a fireplace upon selling their home. According to the National Association of Real Estate Appraisers, adding a fireplace to home can increase the resale value of the home by as much as 6-12 percent.

Why does smoke billow out of fireplace?

A smoking fireplace is the result of chimney draft issues. … The air inside your home pushes air up the chimney, like a vacuum. Good draft conditions allow vented smoke to travel up the chimney quickly, while poor draft conditions can cause smoke to billow back out into your home instead.

Does closing the damper on a wood stove?

By opening the wood stove damper, it allows air to get into the chimney so the fire can start. If you keep the damper open, the fire will build and the smoke and soot will vent through your chimney. … By closing the damper, it will reduce the oxygen levels in the chimney, and you’ll have a longer fire.

How long does a fireplace damper last?

Average Lifespan of Chimney Liners The average lifespan of a chimney liner is 15 to 20 years.

Can you leave damper open overnight?

Leave the damper open overnight. Yes, you will lose some heat up the flue, but you will save the occupants of the home from poisoning by colorless, odorless carbon monoxide. … Only when they are completely cold to the touch is it safe to shut the fireplace damper.

How many dampers does a fireplace have?

There are three main types of fireplace damper: Fireplace throat dampers. Chimney cap dampers. Flue dampers.