Wall cracks can be worrying for any homeowner. To fix them, it helps to know what types of cracks there are and why they happen.

Learning About Wall Cracks

Kinds of Wall Cracks

• Hairline Cracks: These are tiny cracks on the surface of the wall, usually less than 1/16 inch wide.
• Vertical Cracks: These cracks run up and down and might mean the foundation is settling.
• Horizontal Cracks: These are more serious and can show foundation problems caused by soil pressure.
• Diagonal Cracks: These cracks run at an angle and can happen due to different parts of the building settling or moving.

Why Wall Cracks Happen

• Settling Foundation: As your house gets older, the foundation might settle, causing cracks in the walls.
• Temperature Changes: Changes in temperature can make materials expand and contract, leading to cracks.
• Moisture and Water Damage: Water getting into the walls can weaken them and cause cracks.
• Poor Construction Practices: Using bad building methods or materials can lead to early cracking.

Why It’s Important to Fix Wall Cracks

Ignoring wall cracks can lead to bigger issues. Here’s why fixing them is important:

• Preventing Structural Damage: Small cracks can turn into big structural problems if left alone.
• Avoiding Water Damage: Cracks can let water into your home, causing mold, mildew, and more damage.
• Maintaining Home Value: Homes in good shape keep their value better than those with visible damage.
• Ensuring Safety: Large cracks can be dangerous, especially in places where earthquakes happen.

How to Fix Wall Cracks Yourself

Things You’ll Need

• Crack Filler or Sealant
• Putty Knife
• Sandpaper
• Paint and Primer
• Safety Gear (gloves, mask, goggles)

Steps to Fix Cracks

1. Clean the Area: Get rid of any dust or loose plaster around the crack.
2. Prepare the Crack: Use a putty knife to widen the crack a bit so the filler sticks better.
3. Apply Crack Filler: Fill the crack with the filler using the putty knife. Make it smooth so it’s level with the wall.
4. Smooth and Sand the Surface: Once the filler is dry, sand it to make it smooth.
5. Paint Over the Repair: Apply primer, then paint to match the wall.

When to Call a Professional

Sometimes, you need a professional to make sure the repair is done right.

Signs You Need a Pro

• Cracks Wider Than 1/4 Inch: Cracks this wide might mean deep structural problems.
• Growing Cracks: If cracks are getting bigger, it’s a sign of trouble.
• Doors/Windows Sticking: If doors or windows are hard to open or close, it could mean the foundation is shifting.
• Foundation Problems: Any crack that seems related to foundation issues needs expert help.

Why a Professional Can Help

• Finding the Root Cause: Pros can figure out what’s really causing the cracks.
• Long-lasting Repairs: They use advanced methods and materials.
• Warranties and Guarantees: Many pros offer warranties, giving you peace of mind.

How to Avoid Wall Cracks

Regular Home Care

• Check for Cracks Often: Regular inspections can catch problems early.
• Keep Gutters Clean: This prevents water from pooling near the foundation.
• Ensure Good Drainage: Make sure the ground slopes away from your home.

Handling Temperature Changes

• Insulation: Good insulation reduces the impact of temperature swings.
• Humidity Control: Use dehumidifiers to keep indoor humidity at good levels.

Foundation Care

• Smart Landscaping: Don’t plant large trees too close to the foundation.
• Foundation Watering: In some areas, watering the foundation can prevent soil shrinkage.

Common Questions About Wall Crack Repair

• Are wall cracks always a sign of foundation problems?
  Not always. Some cracks are just on the surface, but big or recurring cracks can mean deeper issues.

• Can wall cracks be completely prevented?
  It’s hard to stop all cracks due to natural settling and environment changes, but you can reduce the risk with good maintenance.

• How long does a DIY repair last?
  If done well, small repairs can last several years, but bigger cracks may need professional attention.

• What is the cost of professional repair?
  It depends on the damage. Small repairs may cost a few hundred dollars, while big foundation fixes can cost thousands.

• Is foundation repair covered by home insurance?
  It depends on your policy. Some cover foundation issues caused by sudden events, but not regular wear and tear.

More Resources

• Foundation Repair Canada articles: Foundation Repair Canada Articles
• DIY wall repair videos: DIY Wall Repair Tutorials
• Find Local Foundation Repair Pros: Find Local Pros