Chimneys might look like a sturdy structure that lasts forever, but like any other part of your home, they wear out. Over time, the masonry—the bricks, mortar, and concrete that hold the chimney together—can break down. When this happens, timely chimney masonry repairs are essential to keep your home safe and your fireplace functioning properly.
What Causes Chimney Masonry Damage?
Moisture Infiltration
Moisture is your chimney’s number one enemy. Brick and mortar are porous materials that absorb water. When rain or snow gets into the masonry, it can freeze and expand during cold weather. This process is called the freeze-thaw cycle. This causes bricks to crack, mortar joints to crumble, and eventually weakens the chimney’s structural integrity. A missing or damaged cap or crown can speed up the process by letting water seep directly into the masonry.
Age and Weathering
Even without harsh winters, years of exposure to sun, wind, and temperature changes take a toll. Mortar joints can erode, and bricks can begin to flake or spall. Older chimneys that haven’t been maintained are at higher risk of degradation.
Settling and Structural Shifts
Houses settle over time, and that movement can impact the chimney. Cracks may appear in the mortar or along the bricks themselves, especially if the chimney wasn’t built on a strong footing. Earthquakes, even minor ones, can also cause structural damage.
Creosote and Smoke Damage
If the interior of the chimney isn’t properly maintained, the buildup of creosote from wood-burning fires can eventually lead to corroding metal parts and flue liner damage. In some cases, it can also affect the surrounding masonry through long-term heat exposure.
Poor Construction or Repairs
Not all contractors are created equal, and sometimes, companies cut corners or make mistakes that lead to long-term problems. Using the wrong type of mortar, for example, can cause the bricks to deteriorate faster. A poorly constructed chimney crown might allow water to pool and seep into the chimney.
Our Expert Chimney Masonry Repairs
If your chimney has seen better days, you can count on Motown Fire for expert repairs. Here’s what we offer.
