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Omega Construction of MI

Common Signs Your Chimney May Need Repair

A red brick chimney sits on top of a roof. The sky in the background is very blue with no clouds in the sky.

A chimney looks good on the exterior of your home, but it’s crucial to monitor it regularly. A damaged chimney can quickly compromise your home’s safety and functionality, but it’s easy to spot and fix this damage if you know what to look for. There are some common signs your chimney may need repair—signs you need to stay on top of. When you give your chimney the repairs and maintenance it needs, you can prevent potential hazards and improve the efficiency of your heating system.


A chimney on a home is damaged and weathered. The bricks are worn and there are visible cracks with other wear and tear.

Cracks or Damage


One of the most obvious signs that your chimney needs repairs is visible cracks or damage on its exterior. These cracks come from wear and tear over time, extreme weather conditions, or even structural issues. Cracks can allow water to penetrate the masonry, leading to further deterioration, so you need to stay on top of repairs. Regardless of the cause, it’s important to address these issues as soon as possible to prevent more extensive damage down the line that could compromise your chimney’s structural integrity and even put your home in harm’s way.


Leaning or Tilting

Another sign your chimney may need repairs is leaning or tilting. Any tilting or leaning means there are structural issues at play, whether from:


  • Faulty foundation

  • Shifting soil

  • Poor construction practices


Whatever the cause, it’s important to take action. Ignoring this problem can lead to a potential collapse, resulting in serious damage to your property. Be sure to hire the necessary professionals who can stabilize the chimney and keep chimney disasters at bay.


Efflorescence

Efflorescence, the white or grayish powdery substance that appears on masonry surfaces, is another sign your chimney needs repairs. Efflorescence shows up when water seeps through the chimney, leaving behind salt deposits. While this may seem harmless, it can weaken the structure of your chimney and lead to more substantial issues. Efflorescence is a sign of moisture problems that can cause long-term damage if you don’t address them promptly. Moisture can also cause the mortar to deteriorate over time, compromising the chimney’s stability and effectiveness. Thankfully, regular maintenance and waterproofing can help mitigate these moisture issues.


Water Damage

Efflorescence is one sign of water damage, but other signs to look out for include rusted parts, mold or mildew growth, and damaged bricks or mortar joints. Without proper maintenance, water damage can be a common sight, but it doesn’t have to be. Give your chimney and chimney caps the care they need so you can stop these issues from occurring. Or, if there is already water damage, address it promptly to prevent additional repairs and further deterioration down the line. Additionally, installing proper sealing and waterproofing to prevent water intrusion can extend the life of your chimney and ensure it remains in good working condition.


Smoke Inside Your Home

Smoke coming inside your home when using your fireplace could be another sign that there’s something wrong with the chimney—more specifically, the chimney’s ventilation system. A blockage or improper construction could be the cause, but whatever the source of the smoke is, get professionals in to fix it immediately. Inadequate ventilation can lead to poor air quality and increase the risk of carbon monoxide buildup, which is hazardous to your health.


Damaged Flue Liner

The flue liner is a crucial component of your chimney, as it helps to protect your home from heat and dangerous gases. If you notice any cracks or damage to the flue liner, it’s important to repair it immediately. A damaged flue liner increases the risk of fire or carbon monoxide in your home, two hazards you cannot live safely alongside. If you notice a damaged flue liner, it’s time to replace or repair it. Keeping your flue liner in working order is a key part of chimney maintenance.


Soot Buildup

Soot buildup inside your fireplace or on the exterior of your chimney could be a sign of poor ventilation or an issue with the combustion process. These issues can also lead to creosote buildup, which is highly flammable and can increase the risk of a chimney fire. Instead of letting things get to this point, clean and inspect the chimney regularly to prevent soot accumulation. The buildup of soot or creosote is a major fire hazard that you won’t want to have in your home.


Foul Odor

Another sign of chimney issues is one that you’ll smell instead of seeing—foul odors coming from the fireplace or chimney. These foul odors could signal a lot of issues with your chimney, such as:


  • Water damage

  • Animal infestation

  • Mold growth

  • Creosote buildup

  • Blockages


When you notice a foul odor, address it promptly to avoid further damage and potential health hazards. Ignoring foul odors can lead to respiratory issues or attract pests, compounding the problem.


Cracked Chimney Crown

The chimney crown, also known as the chimney wash, is the top surface of your chimney. This part helps keep water from entering the structure. Cracks or damage to the crown can allow water to seep in, leading to spalling brickwork and further structural damage. If you notice any cracks or damage to the crown, it’s time to bring in chimney repair professionals. With their expertise, they can prevent more serious chimney issues like mold growth or complete chimney collapse.


Animal Nests

Animals, such as birds, raccoons, and squirrels, may see your chimney as a safe and warm place to build their nests, especially during cold weather. While this may seem harmless, these nests can block airflow and lead to significant ventilation issues. Blocked chimneys can cause smoke and toxic gases, like carbon monoxide, to back up into your home.


If you notice any animal nests or signs of animal activity, like droppings or noises, call a professional to check it out. Removing these nests requires care, and in some cases, the animals might be protected by federal laws, so a professional will be your best bet. That’s one of the reasons it’s important to take preventative measures, such as installing a screen to keep animals from nesting there each year.


A red brick chimney is old and out of shape on top of a similarly old home. The sky is cloudy in the background.

Age of Chimney

Like most structures, chimneys have a lifespan and will eventually need repairs or replacement as they age. If your chimney is over 20 years old, it is particularly important to get regular inspections so that you can spot and address any potential issues. Regular inspections can help identify and address age-related issues before they become major concerns.


Your chimney is a crucial part of your home, and it’s important to keep it in good condition. A big part of that is knowing which common chimney repair signs to look for, but it also means knowing when a repair is something you’ll need professional help with. If you notice something wrong with your chimney and need help, let Omega Construction of Michigan take care of you and your chimney. We specialize in Ann Arbor chimney repair, so let the professionals bring back the safety and functionality you’re looking for in your chimney.

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