Is it normal for drywall to crack in corners?

It is quite common for drywall to develop cracks, especially in corner joints. Here are some quick answers about why drywall cracks and what can be done about it:

What causes drywall cracks?

There are a few main reasons drywall cracks can develop:

• Normal house settling – All homes shift and settle over time, which can cause stress on drywall seams and joints. This is the most common cause of drywall cracks.
• Seasonal humidity changes – As wood framing expands and contracts with changes in humidity, this movement can cause drywall fasteners to loosen and cracks to form.
• Poor drywall installation – If drywall corners are not properly supported or fastened, they become vulnerable to cracking.
• Door and window framing – Movement around doors and windows can transfer stress to nearby drywall.

Are corner cracks a problem?

Small cracks and seam separations are generally not a structural concern. However, wide cracks, bulging drywall, or multiple recurring cracks can indicate a more serious issue like:

• Foundation settling
• Roof or framing leaks
• Pest damage

If you suspect any of these problems, it’s a good idea to have a professional inspector determine the root cause.

How can I fix drywall cracks?

Here are some tips for repairing cracked drywall corners:

• Clean out any loose material and debris in the crack using a utility knife.
• Apply joint compound or Spackle paste into the crack and smooth over with a putty knife.
• Allow compound to fully dry and sand smooth.
• Apply 1-2 more thin coats of compound, allowing it to dry and sanding between coats.
• Prime and paint repaired area.

Mesh joint tape can also be embedded in the first layer of compound for wider or more severe cracks to add strength.

How can I prevent future cracks?

It’s virtually impossible to prevent all drywall cracks, but here are some tips to minimize them:

• Use quality, thick drywall rated for humidity resistance.
• Stagger drywall seams when hanging.
• Ensure framing and drywall corners are securely fastened.
• Seal exterior walls properly to limit seasonal moisture changes.
• Caulk and seal where drywall meets other materials.
• Avoid over-tightening drywall screws.

When should I call a pro?

Contact a drywall contractor or handyman for help if:

• You have recurring widespread cracks that won’t stay repaired.
• The cracks are very large, gaping open, or bulging.
• You want to skim coat large areas to hide cracks and imperfections.
• The cracks may indicate a structural issue beyond just the drywall.

Professionals have specialized tools, materials, and techniques for long-lasting drywall crack repairs.

Conclusion

Minor drywall cracks in corners and seams are common in most homes. While annoying, small hairline cracks are typically just a cosmetic issue caused by normal shrinkage and settlement. Larger cracks or cracks that recur after repair may indicate a more serious foundation or structural problem. Basic cracks can often be repaired with some joint compound and paint, but don’t hesitate to call a drywall pro for a long-term fix if DIY efforts don’t do the trick.