What Causes Vertical Cracks in Walls - Repair Options and When to Worry

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Homeowners often wonder what causes vertical cracks in walls and when it’s time to worry. Wall cracks sometimes indicate foundation damage that needs immediate attention. However, this isn’t always the case!

What causes vertical cracks in walls:

• Settlement
• Extreme temperature changes
• Water damage
• Structural issues
• Poor construction

Knowing more about what causes vertical cracks in walls helps keep your home in good condition. You’ll know when to call a foundation repair contractor or other specialist to tackle that damage. Also, it’s good to review how to avoid that damage in the first place. You can then forego otherwise unnecessary repair costs around your home.

What Causes Vertical Cracks in Walls, In Detail

There are many issues that risk vertical cracks in walls. In turn, it's essential to understand these underlying causes to properly address and repair the issue. Check out some common causes of vertical cracks in walls:

Settlement

One of the most common reasons for vertical cracks in walls is the natural settling of a building's foundation. As a house or structure settles into the ground, it can create stress on the walls, leading to vertical cracks. These cracks are typically uniform in width and appear near corners or around doors and windows.

Also, when different parts of a building settle at different rates, it can result in vertical cracks. This can occur if the foundation was not properly constructed or if the soil beneath the foundation is uneven. Differential settlement cracks may appear as diagonal or stair-step patterns.

Temperature Changes

Extreme temperature fluctuations can cause building materials to expand and contract. Over time, this thermal movement can lead to vertical cracks in walls, especially in areas with extreme temperature variations.

Water Damage

Water infiltration is a significant contributor to wall cracks. When water penetrates the exterior surface of a wall and then freezes and expands, it creates pressure. This pressure often leads to vertical cracks and other damage to walls. Water damage can also weaken the structural integrity of the wall over time.

Structural Issues

In some cases, vertical cracks may indicate more significant structural problems, such as inadequate reinforcement or load-bearing issues. These cracks may be wider and more pronounced than typical settlement cracks.

Soil Movement

Changes in soil conditions, such as expansive soils that expand when wet and shrink when dry, can exert pressure on the walls, causing vertical cracks. Soil erosion or poor drainage around the foundation can exacerbate this issue.

Poor Construction Practices

Insufficiently designed or constructed walls can develop vertical cracks due to improper materials, techniques, or quality control during construction.

It's important to note that not all vertical cracks in walls are necessarily a cause for immediate concern. Some cracks may be cosmetic and can be addressed with simple repairs, such as patching and painting.

However, if you observe extensive or widening cracks, consult with a qualified contractor. He or she should assess the severity of the issue and determine if it needs immediate repair. Ignoring significant wall cracks can lead to further structural damage and safety hazards.

How Do You Fix a Vertical Crack in a Wall?

First, ensure you’ve pinpointed and addressed the cause of the crack. Second, remember that larger cracks are too big for patching materials. In turn, you might simply replace that drywall panel. However, if you want to tackle a vertical wall crack, consider these step-by-step instructions:

• Always wear safety gear, including safety glasses and a dust mask, when working with repair materials.
• Use a utility knife or chisel to clean and widen the crack slightly. This helps ensure that the patch material adheres properly. Remove any loose debris with a wire brush.
• For drywall cracks, apply a thin layer of joint compound or spackling paste into the crack. Embed a piece of mesh or tape into the compound, and then apply another layer of compound over it. Feather the edges of the compound to blend it with the surrounding wall.
• For concrete or masonry walls, use an appropriate concrete patch material. Follow the manufacturer's instructions for mixing and application.
• After the compound or patch material dries, sand the patched area until it's smooth and flush with the rest of the wall. Use fine-grit sandpaper for this step.
• If you're repairing a painted wall, prime the patched area to ensure that the paint adheres evenly. Once the primer is dry, paint the patched area to match the rest of the wall.

How Do You Avoid Vertical Cracks in a Wall?

Preventing vertical cracks in walls means avoiding otherwise unnecessary repair bills. Here are a few steps you can take to avoid vertical and horizontal cracks in walls in your home:

• Ensure that the building's foundation is maintained and waterproofed correctly. A strong, stable foundation is essential to prevent settlement-related cracks.
• Properly prepare the soil before construction to avoid differential settlement issues. Compacted and well-engineered soil can minimize settling and prevent cracks.
• Properly manage water runoff and drainage around the foundation to prevent soil erosion and water infiltration. Poor drainage can lead to foundation movement and cracks. Install gutters, downspouts, and proper grading to direct water away from the foundation.
• Conduct regular inspections of your property to identify early signs of cracks. Address any minor cracks promptly before they worsen.
• Be mindful of landscaping practices near your walls. Avoid planting large trees or shrubs too close to your home, as their roots can exert pressure on walls and cause cracks.
• Extreme temperature fluctuations can cause walls to expand and contract. Proper insulation and climate control within the building can help mitigate this.
• When building or renovating, ensure that walls are constructed with quality materials and workmanship. Follow building codes and standards to minimize the risk of structural issues.

A Quick Word From Our Foundation Repair Crew

South Bend Basement & Foundation Repair is happy to explain what causes vertical cracks in walls. If you’re in the area, call our South Bend foundation repair contractors for a FREE inspection. We offer expert foundation fixes as well as waterproofing services. For more information, call today.