Why Drywall Cracks, Ridges, and Beads Happen – and How to Handle Them

Drywall (gypsum panels) is designed to be stable and reliable. But even with the best materials, you may still see cracks, ridges, or “beads” along the joints.

These issues aren’t usually about the drywall itself; they come from what’s happening around it, such as framing shifts, building movement, or improper installation practices.

At Morin Supply, we’ve seen it all. Here’s what causes these problems, how to prevent them, and what to do if they show up in your project.

Common Causes of Drywall Issues

Seasonal Framing Changes

Wood framing naturally expands and contracts with temperature and moisture changes:

  • Cool, damp conditions: Lumber can shrink as the building heats up, pushing panels together and creating ridges or beads.
  • Warm, dry conditions: Wood may later swell in colder months, pulling panels apart and leaving visible cracks.
    These shifts are most noticeable during the first year of occupancy.

Building Movement

No building sits perfectly still. Extreme winds, floods, rapid temperature swings, or insufficient expansion joints can cause slight movement. This motion often shows up as cracked or raised seams in walls and ceilings.

Installation Practices

How drywall is installed matters just as much as the materials used. Issues can arise from:

  • Uneven foundations or framing that isn’t square
  • Panels applied without conditioning the space first
  • Shortcuts such as “belly bands” in walls

Following industry standards and best practices reduces the risk of joint failure and ensures a smoother finish.

How to Prevent Cracks and Ridges

Prevention is the best strategy. Key practices include:

  • Start with level, square framing and a solid foundation.
  • Follow gypsum industry installation standards (GA-216).
  • Use control joints correctly (GA-234) to allow for movement.
  • Plan for extreme weather and avoid shortcuts like belly bands (GA- 236, GA-255)
  • For ceilings, follow GA-227 guidelines to prevent cracking

At Morin Supply, we not only stock the drywall products you need but can also direct you to the right resources to ensure your installation meets these industry best practices.

When Repairs are needed

If you notice cracks or ridges, wait until the building has undergone at least one full heating and cooling season before making repairs. By then, the framing will have adjusted to its environment, and you’ll avoid the same problem from reappearing. For step-by-step methods, the Gypsum Association’s GA-221 guide is a useful reference.

Keeping Your Drywall Looking Its Best

Drywall issues like cracks, ridges, and beads are common — and usually preventable. With the right materials, careful installation, and proper timing for repairs, you can keep your project on track and looking its best.

At Morin Supply, we carry quality drywall products and can connect you with the resources you need to follow industry best practices. Whether you’re a contractor on a large build or a homeowner tackling a renovation, having the right guidance makes all the difference.

Need help with your project? Contact us to speak with our experts or visit one of our showrooms to see our full range of drywall products and supplies.