Different Types of Chimney Caps: What You Should Know

Chimney caps are designed to protect the flue opening at the top of the chimney from damaging rain and snow. Some types of chimney caps go even further in their protective abilities. Let’s look at the two main types of chimney caps.

Chimney Cap Installation in Amherst, NHGeneric chimney caps

This type of cap adds a solid layer of protection for the flue pipe(s) that extend from the top of the chimney. Well-designed caps not only block water, which could lead to extensive masonry, liner and component damage, but they also prevent larger hot embers and sparks from exiting the flue and landing on the roof.

Generic chimney caps cover only the flue opening. That’s where their protection ends.

Custom outside mount chimney caps

Like generic caps, outside mount chimney caps prevent water from getting into the flue and keep sparks from jumping out onto the roof. They also protect a very critical part of your chimney system: the chimney crown.

Chimney crowns are cement coverings that seal off the entire top of the chimney beyond the extended chimney liner or pipes.

Crowns can become cracked over time, and when this happens, water can infiltrate the cement and cause more extensive damage.

When water freezes, it expands, pushing against the interior cement of the crown and breaking it apart. It doesn’t take long before water is able to bypass the damaged chimney crown and begin to erode the masonry below it. The result can be a seriously damaged chimney structure that is unsafe to use.

A sturdy outside mount chimney cap is the only way to keep water and snow from seeping into a cracked crown and causing decay. Outside mount caps cover the entire crown and provide a complete level of protection. If crown damage needs to be addressed at any time, your chimney technician can easily remove the custom cap to get to the problem areas.

Chimney Cap installation in Concord NHWhy you need a chimney cap

As we noted, both styles of chimney caps serve as barriers to incoming water and outgoing sparks. They also provide another very important protection: keeping out debris.

If you operate your chimney without a cap, all manner of falling tree debris can wind up in your flue and create a drafting obstruction. Additionally, many types of small animals such as birds and squirrels love to build nests inside chimneys. All these obstructions can cause smoke and deadly carbon monoxide to back up into the home.

Professional chimney repair technicians and chimney sweeps will all tell you that each part and component of a chimney system works in tandem with all the other parts to keep the chimney safe and operating at peak capacity. Damage to any element within the system can lead to extensive damage throughout.



For this reason, it’s a smart idea to schedule annual chimney inspections and chimney sweep services from technicians who are certified through the Chimney Safety Institute of America. This is the best way to ensure that your chimney is free of damage and safe to use.

Learn more about the benefits of custom outside mount chimney caps by calling the chimney pros at Black Moose Chimney & Stove of Antrim, NH. We’re here to keep you warm and safe. Reach a certified chimney expert at (603) 525-7905.

First Thing

John RantaJohn Ranta
17:01 22 Mar 24
They arrived on time, worked quickly and showed me the results. Prfessional throughout. jr
william greenwilliam green
23:21 14 Mar 24
Really helped me out can't say enough good things highly recommend!!!! The young man that came to my home was very knowledgeable and friendly great attitude all around answered all my questions and left me stress free best of all left no mess.🤙🏻🤙🏻
Michael Dell'OrtoMichael Dell'Orto
18:39 14 Mar 24
Jaime ConleyJaime Conley
17:13 14 Mar 24
Sarah GilliattSarah Gilliatt
01:46 13 Mar 24
A very thorough and careful job done! Thank you.
Larry CookLarry Cook
15:11 07 Mar 24
I wanted to give 5 stars but they are very busy which meant I had a good wait for both the inspection/cleaning, then for a quote on repairs and then for the repairs. Their prices seemed a little high to me but I have nothing to compare with as they were highly recommended by someone I trust and other companies had plenty of negatives reviews which kept me from getting additional quotes. I am happy with the work and they promptly returned to fix a mistake that had been made. Chris the inspector, Jennifer in the office, and Alex and his repair crew were all pleasant and took the time to answer all of my questions. Alex and his crew even took their shoes off (it was winter) before entering my house without even being asked! So if you are not in a rush and want to ensure you chimney is as safe as possible then I think you'll be happy with Black Moose.
Rebecca DeFuscoRebecca DeFusco
22:35 21 Feb 24
After a recent sweep of our chimney, it was discovered that our flue tiles were cracked. Black Moose techs were hard working, detail oriented and professional! Nice jobs guys! See you next year for my cleaning!
Karen CKaren C
14:52 14 Feb 24
Excellent I highly recommend Black Moose Chimney and Stove; Kelly and Liam are awesome, they did a great job. Extremely professional, arrived early, went through everything with a fine tooth comb ensuring pellet stove was thoroughly cleaned. They also were respectful of my home, conscientious and cleaned up after themselves. Made sure stove worked prior to leaving and told me to call promptly if anything came up afterward. Will definitely use them again.
Denise ClarkDenise Clark
16:32 31 Jan 24
We've had Black Moose clean our chimney for a number of years.But recently, we had an emergency situation at our home involving our chimney & oil furnace flue, which was caked full of soot from a malfunctioning furnace. They came & cleaned out both flues in no time, even going up on the roof with snow on it! They cleaned up after their work in the interior rooms where the oil furnace and the woodstove are located. Great work. Reasonable prices. Very nice people. You can't go wrong with Black Moose.
Joe GJoe G
18:30 24 Jan 24
Goods: The technicians know their business, very efficient in cleaning/inspection along with cleaning up after the 'dirty work'.Others: Communications could be more effective. Despite early coordination about scope of work (multiple flues within same chimney) the estimate provided did not reflect this and the final invoice was significantly more than the estimate provided.Quote for follow-on chimney relining was significantly more than that offered by other companies in the area (and far more than neighbors experienced for similar work accomplished by other companies)