Can a Cold & Rainy Winter Damage My Chimney?

Chimney Masonry Repair In Amherst, NHWeather that’s cold and rainy definitely can get the ball rolling toward chimney damage. Also, that kind of weather can significantly worsen any damage that already exists.
Water and masonry don’t mix well. As solid as the surface of a chimney is, water will eventually erode it. Rain and melting snow can get into cracks in the bricks and mortar and cause serious damage. Very cold weather only accentuates this problem.

What kind of damage can water and cold temperatures do to a chimney?

Infiltrating water can damage chimneys in various ways, depending on where and how the water is getting in.

Cracks in the chimney crown:  When the chimney crown at the top of the chimney has cracks throughout the cement, water can seep into the cracks. Then, when temperatures fall below freezing as they often do in southern New Hampshire, the water will freeze and expand and push outward, which causes further damage to the crown.

Bricks and mortar damage:  Bricks are made of a porous material and easily absorb water. As bricks and mortar age, cracking naturally happens. Any section of your chimney’s exterior masonry can suffer decay due to moisture within the material.

Water at the base of the chimney:  The area where the roof abuts the chimney is another area where water can wreak havoc. If the flashing that seals off the gap is warped or damaged, it won’t be able to prevent rain and melting snow from running down the outside of the chimney and into unseen areas of the home, where it will rot walls and beams.

Water pouring in from the top of the chimney:  If your chimney has no chimney cap, it’s easy for rain and snow to enter the flue. Once there, it can begin to erode the chimney liner or interior masonry. Water also can flow downward and rust out the damper.

Chimney Inspection In Concord, NHHow to prevent and address water damage to your chimney

The first step in preventing chimney damage during a cold, wet winter is to have your chimney inspected. A certified, trained chimney inspector will be able to determine how much if any damage already exists and get to work repairing it.

If you have minor chimney leaks, the compromised areas of the masonry or crown often can be sealed with a waterproof coating to keep water out of cracks. In fact, many homeowners have their entire chimneys seal coated for added protection.

If a cracked crown is the culprit, it also may be able to be sealed or, if the damage is severe, rebuilt. Areas of significant water damage to the chimney’s masonry can sometimes be repaired with a process known as tuckpointing, where a new, strong compound is added to missing sections of brick and mortar.



In cases where the roof flashing is warped and letting water in, the flashing can be replaced. If there’s no chimney cap, one can be installed.

A leaky chimney is nothing to take lightly. When leaks begin, they never reverse themselves but rather keep getting worse. If your chimney is leaking or if you suspect there is damage to any part of the system, a certified professional chimney technician should be the first person you call.

Black Moose Chimney & Stove of Antrim, NH, is ready to help with expert chimney inspection, chimney repair and chimney cleaning services. We’ll get your chimney in top shape so it can keep on weathering our difficult New Hampshire winters year after year. Call (603) 525-7905 for more information or to schedule a visit.

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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)