How to Install a Chimney Cap (User’s Guide)

A chimney cap is a great way to protect your chimney from animals, leaves, and other debris. It also helps prevent the need for costly repairs due to water damage. This user’s guide will help you install a new chimney cap on your home.

Chimney caps are an excellent way to keep birds and other animals out of your chimney. They also help prevent rain from entering the flue, which can cause water damage inside your home. In this guide, we will discuss how to install a chimney cap on your roof. This is not a challenging project for homeowners who have basic DIY skills!

What is a Chimney Cap?

A chimney cap is a metal or plastic cover that fits on top of the chimney. It helps keep animals and debris from entering into your chimney, it prevents water from collecting in your flue, and reduces fire hazard.

A cap can be made out of a variety of materials such as aluminum sheeting, galvanized steel sheeting, stainless steel sheeting, copper sheeting , fiberglass reinforced vinyl coating (PVC), colored acrylics sheets.

There are Three Types of Chimney Caps:

  • The Standard Chimney Cap: This is the most common type of cap. It comes in round or square shapes, and features holes for smoke to pass through. The standard chimney cap can be used with any kind of flue lining (e.g., mortar, metal) as well as different types of stovepipe materials (e.g., clay tile, stainless steel). There are various sizes that you need to measure your chimneys before purchasing a new one.
  • Steam Deflector Caps: These caps prevent water vapor from condensing on top of the flue liner shields when hot steam exits your home’s vents into cold outdoor air causing damage over time if it isn’t blocked off by this specific venting system.
  • Rain Cap: This type of cap prevents water from entering into your chimney and protects the flue liner from corrosion over time by letting moisture flow down freely. It helps keep out animals, leaves, debris or anything that can cause a fire hazard as well as block off air drafts so it is important to not use bricks to cover up holes for these vents!

Steps on How To Install A Chimney Cap

  • Measure the thickness of your flue liner. Measure from top to bottom and side to side, so you know how wide or long it needs to be.
  • You will need tools such as a ladder that reaches up high (optional but helpful), wire cutters, screws or nails that are galvanized steel sheeting , primer paint for metal sheets, sealant caulk which is usually colored acrylics with fiberglass reinforcement .
  • Clean off all debris around the cap area using brush scrub pad cleaner solution on spot areas needing extra attention while wearing gloves like dishwashing mitts. Make sure it’s completely dry before installing new caps! You can use compressed air spray cans if needed too which blows away debris from cracks and crevices.
  • Once the area is clean, you can begin installing your caps as well as any other chimney fixtures such as a rain cap or steam deflector if needed. You’ll need to measure everything before doing so for it all to fit! Use screws or nails depending on what type of material your cap is made out of (e.g., stainless steel sheeting requires metal fasteners while colored acrylics sheets require sealant caulk). After that, prime paint with primer spray paint in touch up spots where necessary which helps prevent rust over time!
See also
How to get Bats out of Chimney (User’s Guide)

How to install a Chimney Cap?

A chimney cap is a metal or wood cover that fits on top of the flue to keep out animals, water and debris. Installing one is an easy process as long as you are careful not to damage any existing materials in your home’s roof structure.

Chimneys require regular cleaning for safe operation, so installing a new cap can help protect it from exposure to birds or squirrels nesting inside the chimney cavity. Additionally, caps prevent rainwater from entering through the opening at the top of your chimney which could potentially cause dangerous mold growth within your fireplace if moisture remains trapped within its walls.

To install a chimney cap, first remove any old debris and soot from the flue. Then follow these steps:

  • Clear out an area at least three feet wide around the top of your chimney to accommodate for installation.
  • Use long screws or nails to attach two pieces of galvanized steel mesh onto either side of the opening. Make sure that they are securely attached as you do not want them falling into your fireplace once installed! You can also use other materials such as aluminum flashing or a sheet metal if desired, but make sure it is rust resistant and strong enough to support itself without bowing down under its own weight over time.

Why should I get a Professional to Install my Chimney Cap over the top.

Use screws, nails or bolts to attach it in place by drilling through each of its four corners and into your chimney’s sides. Finally, caulk any gaps with high heat resistant caulking like silicone so that no air can escape in between the materials.

See also
How To Stack Wood In A Fireplace

For detailed instructions on how to install a chimney cap using these methods, watch this video: How To Install A Chimney Cap.

Things you’ll need Before Installation Starts

  • A chimney cap. You can order one on Amazon or at a hardware store near you.
  • Chimney brush, which will help scrub the inside of your flue clean while clearing out any debris that may have accumulated over time.
  • A couple of wrenches or a crescent wrench. It’s not ideal, but you can get away with just one if needed.
  • Gloves to protect your hands from any sharp edges on the chimney cap and prevent falling debris from getting into your skin.
  • A chimney cap. You can order one on Amazon or at a hardware store near you.
  • Chimney brush, which will help scrub the inside of your flue clean while clearing out any debris that may have accumulated over time.
  • A couple of wrenches or a crescent wrench. It’s not ideal, but you can get away with just one if needed.
  • Gloves to protect your hands from any sharp edges on the chimney cap and prevent falling debris from getting into your skin.

Environmental Protection

A properly installed cap is a major step towards protecting the environment from toxins that may escape into air or water. Chimneys can be a number one cause of polluted waterways in some areas, and they are often found to be the primary culprit for elevated levels of mercury contamination in fish living near industrial sites. It’s easy to see why installing caps would benefit both our health and natural surroundings!

Safety Tips

  • Keep kids out of the work area.
  • Protect your eyes, ears and hands with approved safety gear. Don’t forget to wear gloves! Gloves can help protect you from sharp or abrasive metal edges. Always avoid skin contact with caustic chemicals like adhesive remover by wearing protective gloves when removing old adhesives for recycling purposes.
  • Be aware of your surroundings.
  • -Don’t work in wet conditions when you are at risk for slipping and falling. This is especially important when working with ladders, scaffolding or roofs. Be sure to set up the ladder on flat ground that will support the weight of both you and your tools. And never stand on a stackable chair. It just isn’t stable enough to hold full body weight!
  • Installing chimney cap requires preparation which can be done by following simple steps:
  • Steps include: finding out where caps should go; stripping old caulk material; cleaning surface before reusing adhesive tape; measuring size if not using pre cut product…etc…The next step would require installing new cap and running a bead of caulk around the cap.
  • The last step would be to finish by caulking between the chimney cap and roof flashing, as well as along seams in caps, if necessary.chimney
  • Closing off your fireplace from rain or snow is extremely important! Make sure that you have an adequate size chimney cap installed to keep out water and debris like leaves and twigs. This will protect your flue liner (if using one) because it can corrode over time when exposed to moisture; rusting heavy metals which are known toxins into clean air we breathe via smoke stack….etc…It’s also crucial for fire safety since this helps prevent fires caused by embers escaping through open cracks where they can ignite nearby combustibles like wood and dry brush.
See also
How to repair Chimney Mortar?


How do I know what size cap to order?

We currently offer three different sizes (medium, large and extra-large). The medium is best for chimneys that are 14 in diameter. It will fit a few inches inside the top of your flue. If you have questions about sizing please contact us!

What kind of cap should I order?

We recommend either a stainless steel or copper cap. These will be the most durable and long-lasting options, but they also come with an increased price tag. If you’re on a budget we suggest ordering our aluminum caps (which are rust resistant and very affordable). They may not last as long as higher end models, but it does provide some protection for your flue tiles while you save up to buy something better.

Will my stove pipe work with the proper chimney cap?

Yes! The two main kinds of pipes that people use in their fireplace set ups are Type B and K; both types directly to one another. The main difference between these two types is the thickness of the pipe. K-pipes are thicker, often times made from galvanized steel. This means that they tend to be more durable but also heavier and harder to work with when you’re trying to install them in your chimney! Type B pipes are thinner (often times aluminum) which makes it easier for homeowners to handle themselves during installation.


As you can see, chimney caps are an important part of your fireplace. They ensure that rain or snow doesn’t get into the flue and damage it while at the same time protecting birds from getting stuck in there. They also protect other animals like squirrels and raccoons from entering by blocking off entrances to the flue.