Brick is both durable and attractive, capable of lasting many years and even decades with proper care. However, even the strongest masonry can develop cracks over time. Some cracks are cosmetic, but others can signal structural damage that should be addressed by a professional mason in Metro Detroit sooner rather than later.
Michigan homeowners should understand what causes brick walls to crack so they can identify problems early and prevent more extensive and costly repairs later.
Here are some of the most common reasons brick walls develop cracks and what you can do about them.
1. Foundation Settlement
As a home ages, the soil beneath it can shift or settle, causing the foundation to move slightly. Even minor movement can stress out brick masonry, resulting in visible cracks. Some settling is normal, but if you spot large cracks that are quickly growing, it’s time to call a professional.
4 common signs of foundation-related brick cracks include:
- Stair-step cracks following the mortar joints
- Vertical cracks near corners or windows
- Doors and windows that stick or no longer close properly
- Uneven floors inside the home
2. Moisture Damage
Mortar joints are more vulnerable to moisture intrusion than the bricks themselves. Over time, rain, melting snow, and poor drainage can allow water to penetrate the wall.
When temperatures drop below freezing, trapped moisture expands as it turns to ice. This repeated freeze-thaw cycle gradually weakens the mortar, causing both mortar joints and bricks to crack.
You can do your part to reduce moisture damage. Be sure to:
- Keep gutters and downspouts functioning properly.
- Ensure water drains away from your foundation.
- Repair damaged mortar before water can enter.
- Address leaking flashing or roof issues promptly.
3. Aging Mortar
Mortar joints will deteriorate over time. How quickly this happens will depend on the age of your home and environmental conditions. Once the mortar weakens, the bricks lose their structural support, leading to cracks.
Signs of deteriorating mortar include:
- Crumbling or missing mortar joints
- Loose bricks
- Small gaps between bricks
- Fine cracks spreading along mortar lines
Professional tuckpointing in Metro Detroit can replace damaged mortar and restore the strength of your brickwork before more serious damage occurs.
4. Thermal Expansion and Contraction
Brick expands when temperatures rise and contracts as temperatures fall, a cycle that happens over and over throughout the year. This cycle can eventually create stress fractures within the masonry, whether due to improperly designed expansion joints or just years of movement.
Addressing these cracks early can prevent moisture intrusion and additional deterioration.
5. Poor Construction or Repairs
Premature cracks can develop due to improper mortar mixtures, inadequate support, or poor workmanship.
Common construction-related issues include:
- Incorrect mortar composition
- Inadequate structural support
- Poor drainage around the building
- Low-quality repair materials
This is why it’s so important to hire experienced masonry professionals in Michigan to ensure repairs are done right the first time.
6. Tree Roots and Soil Movement
Large trees growing close to your home can contribute to brick wall cracks due to:
- Expanding roots that disturb the soil beneath the foundation
- Drought conditions and excessive rainfall that cause the soil to shrink or expand
This shifting ground places additional stress on your home’s foundation, which can cause cracks in your brick walls. Schedule regular inspections to catch potential issues before they become major structural problems.
Don’t Ignore Cracks
Not every crack means your home has a major structural problem, but you shouldn’t ignore them either. Even tiny openings can invite moisture into your brick walls, causing premature deterioration, mold growth, and more expensive repairs if left untreated.
Contact Mortar City Masonry
If you have noticed new cracks, widening mortar joints, or loose bricks, it’s time to schedule a professional masonry inspection in Metro Detroit. Our team can determine the cause and recommend the appropriate solution, whether tuckpointing, brick replacement, or restoration.
