Why is my Chimney’s Masonry Crumbling?


There are lots of reasons why your chimney’s masonry may be crumbling, and a professional chimney mason will likely be able to take a look at your chimney and determine exactly what has caused the damage based on the way your chimney brick has responded. For instance, spalling brick—characterized by brick faces popping off—usually indicates severe moisture damage.

If you can see damage on the outside of your chimney, just imagine all the damage hiding on the inside. The chimney masons at Pozzi Chimney Sweep want to help make your home safe again so that your family and home are protected.

If you can see damage on the outside of your chimney, just imagine all the damage hiding on the inside. The chimney masons at Pozzi Chimney Sweep want to help make your home safe again so that your family and home are protected.

The most important thing to do is to not ignore your crumbling masonry and to call a CSIA-certified professional to remedy it. Masonry in bad condition will only grow worse and lead to greater problems such as water damage to the interior of your chimney and to the ceiling and walls adjacent to your chimney.

Here are some of the things that may be causing your chimney masonry to crumble:

  • It’s water-damaged – This is the problem we see most often. Mortar is surprisingly absorbent and can draw rainwater into the chimney. The freeze-thaw cycle can worsen this problem.
  • It’s old – If you have an ancient masonry chimney, just think of all the things it has likely had to withstand, sticking out from the top of your roof all these years. Weather, flue gases, and time have surely taken a toll. It’s only natural that your old masonry chimney would eventually need attention.
  • It’s unprotected -All chimneys need to be professionally waterproofed to keep water from seeping into the brick and mortar, while still allowing your chimney to “breathe” so that flue gases won’t be trapped inside the masonry.
  • It was built with the wrong bricks – Different bricks are designed to be utilized in different ways. If your chimney’s masonry seems especially vulnerable, it may be that improper materials were used during its construction.
  • It was damaged by sandblasters or pressure washers -It may seem like a good idea to clean your chimney with one of these high-powered tools, but this can be problematic, as these machines can force water into your bricks, shortening their lifespan.

How We Restore Crumbling Brick Chimneys

At Pozzi Chimney Sweep, we don’t think there are any chimney problems that we have yet to encounter. Our chimney masons are usually able to diagnose the problem with your chimney’s masonry during our initial consultation. We’ll then recommend the best, most affordable and durable method for repairing your chimney.

In addition, there are some great ways to protect your chimney’s brick and mortar from future harm once we get it repaired for you. We always recommend waterproofing following any of the masonry repairs we do.

For information on chimney repairs, contact us today. We serve customers in and around the Hinckley, Illinois, area.