How Much Does a Chimney Cap Cost to Install?

Chimney caps protect your chimney and keep your indoor temperature stable. Chimney cap cost ranges from $75 to $1,000, with an average cost of $300.

By Brionna Farney | Published Sep 12, 2022 2:57 PM

Chimney Cap Cost

Photo: depositphotos.com

  • Typical Range: $75 to $1,000
  • National Average: $300

There are a lot of working parts and pieces in a chimney system, each one important in keeping a home safe and warm. A chimney cap is installed on top of a chimney to keep moisture out and warm air in. How much does a chimney cap cost? According to Angi and HomeAdvisor, chimney cap replacement cost is anywhere from $75 to $1,000, with a national average of $300.

Before installing or replacing a chimney cap, homeowners will want to consider all of the factors that affect the cost, like the cap material, size, and shape. They’ll also want to understand the differences between replacing and repairing a chimney cap and between prefabricated and custom chimney caps. Homeowners who are on the fence about the cost to install a chimney cap can use this guide to understand all of the benefits a chimney cover has to offer as well as learn how to vet and hire a qualified chimney professional for proper installation.

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Factors in Calculating Chimney Cap Cost

It is always a good idea to install a cap on top of a chimney flue. The answer to the question “How much to install a chimney cap?” depends on a variety of factors, including the material, size, and shape of the chimney cap and the size and type of the chimney.

Chimney Cap Material

Chimney caps can be made from a range of metals, including galvanized steel, aluminum, stainless steel, and copper. Each one offers a different level of durability and curb appeal. Galvanized steel and aluminum are the most cost-efficient options at $25 to $200 and $40 to $400, respectively. Stainless steel is a little better quality and therefore costs a bit more at $50 to $500 per cap. Copper is the most expensive at $200 to $800 due to its impressive durability and aesthetic value.

Chimney Cap Size

Chimney caps come in different sizes to fit a wide range of chimneys. The larger the chimney cap, the more expensive it will be. These caps usually fit right over a chimney flue, so the size and number of flues a chimney has will dictate the price. A cap for a chimney with two flues will typically be twice as much as a cap for a chimney with a single flue.

Chimney Cap Shape

Most chimney caps are round or square. These stock shapes cost between $300 and $375 and $340 and $585, respectively. Oval and rectangular chimney caps cost more, as the shape is more unusual and therefore harder to find. Oval chimney caps cost $360 to $625, and rectangular ones run $385 to $650. A custom-shaped chimney cap will be the most expensive at $425 to $845. Historic homes with intricate chimneys might require custom chimney caps.

Chimney Type

The type of chimney on a home also plays a role in the overall chimney cap replacement cost. Most chimneys tend to be made out of masonry—standard chimney caps work in this application. If a chimney is made from metal, an intricate type of stone, or another material, however, the chimney cap may have to be custom-made, which will end up costing more. Additionally, if the chimney has multiple flues, is an unusual shape, or has any other unique characteristics, the cost of the chimney cap will be much more than the average range.

Labor

In addition to the cost of the cap itself, homeowners can expect to pay a chimney cap installation cost of $100 to $200, depending on the labor rates in their area and the complexity of the job. If the chimney has multiple flues or masonry work is required in addition to the cap replacement, the labor cost will increase. Labor costs will also be more if the homeowner is replacing the chimney cap versus just installing a new one, because the professional will need to remove the old cap first.

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Preparation Work

In some cases, a chimney might require additional prep work, including cleaning or preparing the surface, before the chimney cap can be installed. A chimney sweep costs between $129 and $378 on average, so homeowners can factor in this cost if they expect cleaning to be a requirement. Additional prep work can be avoided by employing the best chimney cleaning services to sweep the chimney annually and inspect it to be sure it’s in good condition.

Seasonality

Homeowners can look into installing a chimney cap in the spring or fall for the best pricing. In the winter, the conditions for installing the cap on a roof can be a little more dangerous. The added time and effort to climb and work on a roof in the winter will typically increase the project price. In the summer, a roof could be too hot to work on without damaging the shingles or membranes, so again, the added precautions can add to the overall cost.

Chimney Cap Cost

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Additional Costs and Considerations

How much is it to cap a chimney? In addition to the cost factors listed above, homeowners will want to look into how the following considerations might affect a project. Custom chimney caps and full chimney cap replacements will add to the total cost.

Prefabricated vs. Custom Caps

Homeowners can choose between prefabricated chimney caps and custom ones. Prefabricated chimney caps are typically readily available in stock sizes, whereas custom-made chimney caps are made to order. For this reason, custom chimney caps can cost much more than prefabricated ones, at $200 to $1,000 per cap. The customization includes not only the dimensions but the style, material type, and any decorative finishes. If the size or style of the chimney cap the homeowner needs is not available in a prefabricated version, they will have to purchase a custom cap instead.

Repair vs. Replacement

In some cases, a homeowner might choose to repair their chimney cap instead of replacing it. The chimney cap must be in decent shape to warrant just a repair. Usually, minor dents and cracks can be repaired. A chimney cap repair costs between $100 and $250. If the material has rusted or the cap is deformed from weather and age, it must be replaced. It will cost $300 to $600 to replace an old chimney cap.

Permit and Inspection Costs

Depending on local building codes, a building permit might be required to replace a chimney cap. If a permit is required, a code enforcer will review the project plans and ensure they are up to code. A building permit usually costs between $100 and $600, usually on the lower end for this type of project, and is well worth the expense to ensure the project is done right.

Customizations

Chimney caps can be simple, ornamental, or anything in between. If you want a cap that is more decorative to fit with your home’s current aesthetic, expect to pay $400 to $800. There are a variety of decorative chimney caps available, from swooped style to a bishop’s arch. Any customization that is above and beyond a standard chimney cap will add to the total cost.

Types of Chimney Caps

How much is a chimney cap? That depends on the material it is made from. Chimney caps are typically made from galvanized steel, aluminum, stainless steel, or copper. Each material has its pros, cons, and associated costs not including labor.

Galvanized Steel

Galvanized steel chimney caps are a popular option due to their entry-level cost—between $25 and $200 for the cost of a chimney cap. The lower cost is due to the quality of the galvanized metal. Galvanized steel chimney caps do tend to rust, which can eventually discolor a roof and require a replacement. These chimney caps usually last up to 5 years but sometimes less in a location that experiences a lot of extreme weather.

Aluminum

An aluminum chimney cap costs between $40 and $400. Aluminum is more corrosion-resistant than galvanized steel but tends to be less sturdy; because it is a soft metal, it is more easily bent and damaged. The color is brighter than that of galvanized steel, which might be a reason to choose this over the other options. As is true of galvanized steel, aluminum chimney caps will last about 5 years.

Stainless Steel

Stainless steel chimney cap cost ranges from $50 to $500. These chimney caps are a bit more durable and long-lasting than aluminum and galvanized steel. For this reason, they are usually most often recommended by professionals. Some stainless steel chimney caps come with a lifetime guarantee, but on average homeowners can expect them to last about 10 years total. This is the shiniest of all the metals with the highest level of durability.

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Copper

Copper chimney caps, the most expensive at $200 to $800 each, are considered the best type of chimney cap to install for a number of reasons. The material is very durable and will withstand the elements. Additionally, the copper color can add an aesthetic touch as it gains patina over time. Similar to stainless steel chimney caps, copper caps often come with a lifetime warranty.

Chimney Cap Cost

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Benefits of Chimney Caps

The investment in a quality chimney cap is almost always worth it due to the benefits. A properly installed chimney cap will protect a chimney and help maintain the warm temperature inside a home.

Increased Energy Efficiency

A home’s energy efficiency increases when downdrafts—cold gusts of wind—are blocked by a chimney cap.Chimney caps prevent downdrafts from entering the home and help to keep the indoor temperature stable.

Fire Prevention

Chimney caps prevent fires by controlling sparks that may occur inside the chimney. If any of these sparks escape the chimney, they can easily start grass or brush fires. A chimney cap also prevents embers from exiting the chimney and potentially causing a roof fire.

Moisture Prevention

A chimney without a cap is exposed to lots of water from rainfall. This excess moisture can damage the chimney’s liner, dampers, and mortar joints. The best chimney caps for rain prevent precipitation from entering a chimney. Instead, the rain is diverted, down the roof to the gutters. The cap reduces the risk of moisture-related damage to a chimney.

Animal Prevention

Animals looking for a safe place to call home, especially during the colder months, might just find it inside a chimney. Unwanted animals in a chimney can prevent smoke from exiting the flue, causing smoke damage or even carbon monoxide poisoning. From birds and bats to squirrels and other varmints, a chimney cap will cut off access so these pesky critters can’t come inside, which means the homeowner won’t be frantically searching “how to get birds out of a chimney” in the middle of the night.

Prolonged Chimney Liner Life

A chimney usually has a liner down the interior walls that protect the structure and reduce fire hazards. The lining can be clay, ceramic, or metal. A chimney cap helps to extend the life of a chimney liner by reducing the amount of water and debris that enters a chimney. The less a chimney liner is exposed to moisture, the longer it is likely to last.

Chimney Cap Cost

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Chimney Cap Installation: DIY vs. Hiring a Professional 

Some homeowners may wonder if they can install a chimney cap themselves. While the process of placing and securing the chimney cap is not all that difficult, accessing the chimney is another story. Most chimneys are hard to reach and require ladders or even scaffolding to create a safe work surface. Additionally, if a chimney cap is not installed correctly, the chimney may not exhaust properly. Trapping smoke in a chimney can lead to carbon monoxide inhalation or even chimney fires.

For safety reasons, it is highly recommended that homeowners hire a professional to install a chimney cap. An expert will know precautions to take how to properly and safely access the chimney and the correct height and placement for the chimney cap installation. During the installation homeowners can also request an inspection of their chimney and a recommendation on other repairs. The process should take only a couple of hours for a professional to complete and will give homeowners extra peace of mind knowing that their chimney cap has been correctly installed.

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How to Save Money on Chimney Cap Cost

How much to replace a chimney cap? Installing a chimney cap can be expensive, but there are several ways homeowners can save money on the cost of this project without sacrificing quality or cutting corners. What follows are some money-saving tips to help homeowners complete the project without breaking the bank.

  • Request multiple quotes from qualified chimney cap installers. It is always a good rule of thumb to solicit at least three different pricing quotes to compare the cost of services and choose the best value option.
  • Consider a less expensive chimney cap material. Galvanized steel is the least expensive, followed by aluminum. Both options will work well for a chimney cap; homeowners will just want to make sure they know the pros and cons of the material and that it will work for them.
  • Be on the lookout for sales at retailers that sell chimney caps. Typically, around certain holidays or at the end of seasons, big-box stores will have sales during which homeowners might be able to scoop up a deal on a chimney cap.
Chimney Cap Cost

Photo: depositphotos.com

Questions to Ask About Chimney Cap Installation

Before hiring a chimney professional to install a chimney cap, homeowners will want to make sure they are hiring someone who is qualified to do the job. Ask these important questions to help ensure a quality installation.

  • Are you licensed and insured to perform this type of work?
  • Have you completed this type of work in the past?
  • Do you have previous testimonials you can share?
  • What type of chimney cap do you recommend?
  • Do you have any additional chimney repair recommendations?
  • Are your technicians trained for this type of work?
  • How soon can you complete the chimney cap installation?
  • How long should I expect this type of chimney cap to last?

FAQs

Homeowners may have questions about chimney cap installation cost before they decide to replace or repair theirs. The following are some of the most frequently asked questions that will supplement homeowners’ research and set up their project for success.

Q. Is a chimney cap necessary?

A chimney can work properly without a cap, but having one will help a chimney last longer and perform better. Chimney caps keep moisture and debris out of a chimney and keep embers that can cause fires inside the chimney. They also help prevent downdrafts that interfere with heating a home.

Q. How tall should a chimney cap be?

A chimney cap should be at least 8 inches taller than the chimney flue—more than 8 inches is ideal. This allows enough of a gap so the chimney smoke still exhausts properly while rain, snow, and other items are kept out.

Q. Do chimney caps keep rain out?

Yes, chimney caps do keep rain out of chimneys. Rain falls off the top of the chimney cap onto the roof and into the gutter or drainage system rather than getting inside the chimney flue. This protects the inside of a chimney from moisture-related damage.

Q. Can I install a chimney cap myself?

It is possible for homeowners to install a chimney cap themselves; however, most homeowners choose to hire a chimney expert for the job. Working on top of a roof can be dangerous without the correct equipment and training. Additionally, an improper chimney cap installation can increase the risk of chimney fires.

Q. How long does a chimney cap last?

A chimney cap can last for several years depending on the material and weather conditions. In most cases, a chimney cap will last for 5 to 10 years, but it could last even longer.

Q. How do I know if I need a new chimney cap?

There are several ways homeowners can determine whether their home needs a new chimney cap, including the following:

  • The current chimney has started to rust.
  • The homeowner notices moisture or debris getting into their chimney.
  • The homeowner can feel cool downdrafts entering their home through the chimney.
  • The homeowner can see that the chimney cap has been damaged or blown off.
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