How to Install Chimney Cap: A Step-by-Step Tutorial 2023

Assuming you have a traditional masonry chimney, installing a chimney cap is a relatively easy do-it-yourself project. In this tutorial, we will walk you through the steps of how to install a chimney cap, from gathering the necessary tools and materials to putting the finishing touches on your new installation. 

By following these simple steps, you can help keep your home safe from animals and pests, prevent water damage, and drafty winds.

What is a Chimney Cap?

A chimney cap is a metal cover that fits over the top of your chimney. It has a mesh screen that prevents animals and birds from getting into your chimney, and it also keeps rain and snow from getting in. 

Chimney caps come in many different sizes and shapes, so it’s important to choose one that will fit your particular chimney. 

You can buy a chimney cap at most hardware stores or home improvement stores. If you’re not sure what size to get, you can measure the dimensions of your chimney opening and then consult with a salesperson at the store. 

To install a chimney cap, you’ll need to attach it to the top of your chimney with screws or bolts. Make sure that the cap is securely fastened so that it doesn’t blow off in strong winds.

Why Install a Chimney Cap?

A chimney cap main purpose is to keep rain, snow, and animals from getting into your chimney. 

how to install chimney cap

A secondary purpose of a chimney cap is to increase the draft of your chimney. If you have a fireplace, installing a chimney cap is one of the best things you can do to protect your home. 

A cap helps to prevent water from entering your chimney and causing damage. Without the protective cover of a chimney cap, rain and snow can enter the chimney flue, which can lead to dampness and corrosion of metal parts inside the chimney like the liner or flue. The moisture that accumulates in the flue can even start to cause mold and mildew growth in your home.

In addition, animals such as birds, squirrels, and bats can come into your home through an unprotected chimney stack. A chimney cap stops them from being able to gain access. 

Finally, a cap also helps maintain a strong draft in the fireplace by keeping out wind from entering the top of the flu. This will help your fireplace operate more efficiently since air is not lost through gaps at the top of the stack, resulting in improved heat flow into your home.

Preparing to Install

Before you begin, take a look at the inside of your chimney. If it’s lined with clay tiles, it’s in good enough condition to install a cap. If it isn’t lined or if the lining is in poor condition, you’ll need to have it relined before proceeding.

Next, you’ll need to measure the width and height of your chimney flue. To do this, use a tape measure to find the distance between the two outside edges of the flu. Then, measure the height of the flue from the top of the chimney crown to where the flue meets the smoke shelf. Once you have these measurements, you can purchase a chimney cap that’s the right size for your flue.

Now that you have everything you need, it’s time to get started!

Step by Step Guide for Installing a Chimney Cap

A chimney cap is a great way to keep your chimney clean and free of debris. But before you can start using your new chimney cap, you need to install it properly. 

how to install chimney cap
Via: Aboveandbeyondchimneyservice

Here’s a step-by-step guide for installing a chimney cap:

  • First, measure the opening of your chimney. You’ll need this measurement to choose the right size chimney cap.
  • Next, select the appropriate chimney cap for your needs. There are many different types and styles of chimney caps available on the market today. Make sure to select one that will fit your particular chimney opening correctly.
  • Once you have the correct sized chimney cap, it’s time to install it. Start by attaching the rain diverter to the top of the cap. This will help keep water from entering your Chimney when it rains or snows.
  • Next, use screws or nails (depending on what type of installation hardware came with your particular chimney cap) to secure the base of the chimney cap to the top of your flue liner. Make sure that the Chimney Cap is level as you secure it in place.
  • Attach any screen material to the sides of the Chimney Cap using zip ties or metal strapping. This will help keep birds and other animals out of your Chimney.

Tips for Maintenance and Cleaning

In order to keep your chimney cap in good working condition, it is important to regularly maintain and clean it. Here are some tips to help you with this:

  • Inspect the chimney cap regularly for any damage or wear and tear. If you notice any issues, make sure to repair or replace the part as soon as possible.
  • In order to prevent the build-up of soot and creosote, it is important to regularly clean your chimney cap. You can do this by using a wire brush or a power washer.
  • Make sure to also regularly clean the area around the base of the chimney stack, as this can also become clogged with soot and debris over time.
  • If you live in an area with a lot of wind, it is important to check the chimney cap regularly to make sure that it is securely fastened in place. Also, surely to trim any trees or shrubs near the chimney so that they don’t interfere with the airflow.
  • It is always a good idea to have your chimney professionally inspected and cleaned at least once a year by a certified technician. This will ensure that your chimney is in good working condition and helps prevent any potential problems from occurring.

Alternatives to Installing a Chimney Cap

If you’re not keen on installing a chimney cap, there are a few alternatives you can try. 

Chimney balloon

One is to install a chimney balloon. This is an inflatable device that you insert into the chimney flue and inflate. Once it’s inflated, it seals off the flu and prevents outside air from getting in.

Ductless range hood

Another alternative is to install a ductless range hood. This type of hood vents to the outside without the need for a duct, so it doesn’t require a hole in your roof. It’s important to make sure that the range hood is properly installed and vented so that it doesn’t cause any problems with your home’s ventilation system.

You could simply seal off the opening at the top of the chimney with caulk or another type of sealant. This will prevent outside air from coming in but won’t do anything to keep hot air from escaping out the top of the chimney.


Can you glue a chimney cap on?

Yes, you can glue a chimney cap on if the surface is smooth. We recommend using a strong adhesive such as epoxy or construction adhesive. Apply the adhesive to both the chimney cap and the chimney surface. Press the two surfaces together and hold for several minutes until the adhesive sets.

Why install a chimney cap?

Chimneys are an important part of any home, and they should properly maintain in order to prevent fires and other damage. One way to help protect your chimney is to install a chimney cap. Chimney caps cover the top of the chimney and help to keep debris and animals from entering. They also help to prevent sparks from escaping, which can help to prevent house fires. If you’re thinking about installing a chimney cap, here’s a step-by-step tutorial to help you get started.

Does a chimney cap need mesh?

If you’re looking to install a chimney cap, you will wonder if it needs mesh. The answer is yes, chimney caps almost always come with some form of mesh. The mesh serves two purposes: first, it keeps animals and debris from entering the chimney; and second, it helps support the cap itself. So if you’re thinking about skipping the mesh, think again!

What is the difference between a chimney cap and a flue cap?

Chimney caps are placed on top of the chimney, while flue caps are placed inside the chimney. Chimney caps are usually made of metal, while flue caps are usually made of concrete. It help keep water and debris from entering the chimney, while flue caps help keep birds and small animals from entering the chimney.

Do chimney caps keep water out?

Chimney caps are designed to keep water out of your chimney, and they do a pretty good job of it. There are a few different types of chimney caps, but the most common type is the rain cap. Rain caps are designed to fit over the top of your chimney and keep rain and snow from getting into your chimney. They’re usually made of metal or plastic, and they have a hole in the center that allows smoke to escape. 

If you live in an area that gets a lot of snow, you may want to consider getting a snow cap for your chimney. Snow caps are similar to rain caps, but they have solid sides that prevent snow from getting into your chimney. 

You may not need a chimney cap at all, if you live in an area that doesn’t get a lot of precipitation. However, if you have animals that like to climb on your roof (like squirrels), a chimney cap can help keep them out of your chimney.


Installing a chimney cap is not a difficult process, but it does require a little knowledge and the right tools. With our step-by-step tutorial, you should now have all the information required to successfully install your new chimney cap. If you are still uncertain about performing the installation yourself, we recommend hiring an experienced contractor for this task as they can get it done correctly in no time. Good luck with your project and enjoy being safe from any further rain or snow entering your home through the chimney!