Facts About Chimney Cracks

Chimney cracks are problems that should not be ignored, and CSIA-certified chimney technicians have the know-how to provide the facts about the cracks. Black Moose Chimney & Stove, for instance, is the most trusted chimney sweep company in Southern New Hampshire. We will diagnose the cause of the cracks in your chimney and provide needed repairs, including a complete chimney rebuild if needed. The following are some basic facts about chimney cracks.

Chimney Masonry Repairs In Keene, NHWater Leaks

Chimney problems in general are caused by water more than anything else. Water leaking into the masonry chimney system is serious. If repairs aren’t made quickly, water intrusion will cause the freezing and thawing cycles of winter to create destructive movement in the masonry, as the water expands and contracts. Cracks are among the ill effects of leaks. Spalling may occur, as well, which means that the brick face crumbles, flakes, and breaks off due to the effects of water intrusion. Effervescence or white staining on the chimney is also caused by water within the chimney system, and it can occur when the masonry contains water-soluble salts.

Improper Construction

There are certain aspects of chimney building that help to ensure a sound structure. If something in the construction is lacking, the result could be a cracked chimney. A common construction error is a failure to leave a thermal expansion gap between the clay flue liner and the sides of the chimney masonry.

The surrounding brick will crack after repeated use of the heating appliance, as the flue expands and contracts.

A Foundation Problem

The specifically-designed footing must be part of the construction of a masonry chimney. In addition to the usual foundation, the footing is needed for chimneys because they are extremely heavy. If the chimney footing and/or the foundation are not secured properly, the chimney may lean and cracks may appear.

Chimney Masonry Repair in Manchester, NHMechanical Damage

Various circumstances can stress a chimney to the point that cracks develop. A chimney-mounted antenna could cause chimney cracks. Nearby site blasting or an actual earthquake can also cause mechanical damage that results in chimney cracks.

If there are cracks in your chimney, it is important not to use the venting system until masonry repairs have been made.

The potential risks of using a cracked chimney include the following:

  • Toxic gases could leak into your home. This includes deadly carbon monoxide, which is known as the “Silent Killer.” Carbon monoxide is tasteless, odorless, colorless, and symptomless. Unless there is an operational carbon monoxide detector in a home where exposure to the deadly gas is occurring, occupants often don’t survive.
  • There is an increased risk of a house fire because if the chimney is split, the sparks could get to combustible parts of the home.
  • When masonry chimneys begin to lean or crack, there is a very real risk of a sudden catastrophic collapse of the entire chimney structure. People could be injured and structural damage could be extensive.
  • At the very least, a cracked chimney could adversely affect the operation of the chimney. When fumes don’t rise up and out of the chimney, carbon monoxide exposure can occur.

If you have chimney cracks, call the chimney leaders in Southern New Hampshire at Black Moose Chimney & Stove Inc. We can diagnose the cause of your cracked chimney and provide needed chimney repairs, including brickwork, masonry repair, and a partial or complete chimney rebuild. Call us today 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)