Seeing Cracks on Your Chimney? 8 Signs It’s Time for a Rebuild

chimney rebuild in Toronto

Chimneys are an important part of a home, providing ventilation for various appliances and heating systems. However, over time, chimneys can become damaged and require repairs. Knowing the signs of a chimney that needs to be rebuilt can help ensure your home is safe and functioning properly. In this blog post, we’ll discuss eight signs of needing a chimney rebuild.


  1. Cracks and Leaks


If you notice any cracks or leaks in your chimney, this is a sure sign you need to rebuild it. Cracks can create openings for cold air to enter your home and an entry point for water or pests. If you notice any cracks or leaks, contact a professional to assess the damage and determine if a rebuild is necessary.


  1. Deteriorating Mortar


The mortar used to hold together the bricks of a chimney can deteriorate over time, allowing water to enter and cause further damage. If you notice any crumbling or missing mortar, it’s important to have it repaired as soon as possible.


  1. Rusting Flashing


Flashing is the metal strip that is used to seal the space where the chimney meets the roof. If the flashing is rusted or corroded, it must be replaced as soon as possible to prevent water damage to your home.


  1. Loose Bricks


If you notice any loose bricks in your chimney, it may be a sign that it needs to be rebuilt. Loose bricks can create openings for cold air to enter, as well as an entry point for pests.


  1. Soot Buildup


Soot is a byproduct of burning wood or other fuels. If you notice a buildup of soot in your chimney, it’s a sign that it needs to be cleaned. If the soot buildup is too severe, it may require a rebuild.


  1. Leaning Chimney


If your chimney is leaning, this is a sign of structural damage and likely means a rebuild is necessary. A leaning chimney can cause the entire structure to fail, so it’s important to take this seriously and consult a professional. 


  1. Missing Chimney Cap


The danger of having no chimney cap is that it can contribute to the deterioration of the chimney. With no cap, rain and other moisture can enter the chimney and cause the masonry to degrade. This can lead to cracks and other damage, which can cause smoke and other gases to enter the home. 


  1. Spalling


Spalling can occur due to exposure to extreme temperatures, water damage, and the normal wear and tear of aging. If the spalling is left untreated, it can lead to further damage and even structural failure.


Signs of spalling can include crumbling bricks, flaking mortar, and pieces of the chimney coming off. If you notice any of these signs, it is important to have a professional inspect your chimney. They can determine the extent of the damage and recommend the necessary repair. It is also important to ensure that your chimney is properly sealed and waterproofed to prevent further damage.




If you notice any of the signs listed above, it is important to act quickly and hire a professional to assess the condition of your chimney.  A chimney rebuild is necessary when the structure is damaged and should not be delayed.  A professional chimney technician is best equipped to determine the extent of the damage and recommend the best course of action for your chimney.  Taking these steps now can save you time, money, and headaches down the road.


Does your home need a chimney rebuild in Toronto? Red Robin Masonry is here to help. Our masonry services include brickwork, chimney work, parging, stonework and much more. Get in touch with us today and let us know how we can help!

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