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How to Repair Damaged Drywall Corners

How to Repair Damaged Drywall Corners

Fixing Drywall Corner Damage

Cracks in drywall corners can be unsightly and even compromise the structural integrity of your walls. Fortunately, repairing them is a simple process that requires only a few tools and materials. In this article, we'll guide you through the entire process, from identifying the cause of the damage to fixing it and preventing future issues. Let's get started!

Why Are There Cracks in the Corners of My Walls?

Natural settling of a building, impact damage, water damage, or general wear and tear can all cause cracks in the corners of walls. You can take appropriate action to repair and prevent future damage if you understand the cause of the cracks. Before we get started on the repair, let's go over the most common causes of damaged drywall corners.

Impact Damage

Accidents happen, and sometimes drywall corners can take a beating. Moving furniture, roughhousing, or even just a misplaced elbow can cause dents, cracks, and holes in your drywall.

Water Damage

Leaks from plumbing or a roof can lead to water damage in your drywall. If left unchecked, water damage can cause mold growth, weakening the drywall and leading to more significant issues.

Wear and Tear

Over time, drywall can wear down, especially in high-traffic areas. The corners are particularly susceptible to chipping, cracking, or peeling paint.

Is it Normal for Drywall Corners to Crack?

Cracks in drywall corners can occur for several reasons, as mentioned above. It is not unusual for drywall corners to develop cracks due to natural settling of a building, impact damage, or wear and tear. However, it is essential to address these cracks to maintain your home's aesthetics and structural integrity.

Damaged Drywall Corner Bead

Tools and Materials Needed to Repair Damaged Drywall Corners

To repair damaged drywall corners, you'll need some essential tools and materials.

Tools Needed for Repair Drywall Corners

  • Utility knife
  • Sandpaper or sanding block
  • Drywall jab saw
  • Metal or plastic drywall corner bead
  • Joint compound knife
  • Drywall screws or nails
  • Hammer or screwdriver

Materials Needed for Repair Drywall Corners

  • Joint compound
  • Corner bead
  • Primer
  • Paint

How to Repair Damaged Drywall Corners

Using the tools and materials listed above, follow these steps to repair your damaged drywall corners.

  1. Assess the Damage: Inspect the damaged area to determine the extent of the damage. This will help you decide whether a simple patch or a more extensive repair is necessary.

  2. Prepare the Area: Clear the area around the damaged corner, and cover the floor with a drop cloth to protect it from debris.

  3. Remove Damaged Material: Use a utility knife or drywall jab saw to cut away the damaged section of the drywall. Be sure to remove any loose or crumbling material.

  4. Apply Joint Compound: Apply a thin layer of joint compound to the exposed edge of the drywall, extending it slightly beyond the edge to create a smooth surface for the new corner bead.

  5. Install Corner Bead: Measure and cut the corner bead to fit the length of the damaged area. Position it over the corner, ensuring that it is flush with the drywall on both sides. Attach the corner bead using drywall screws or nails, spaced about 8 inches apart. Check out our more in depth guide for installing corner bead

  6. Apply Additional Joint Compound: With the corner bead securely in place, apply a layer of joint compound over the bead, extending it onto the adjacent drywall surfaces. Use a joint compound knife to create a smooth, even surface. Allow the joint compound to dry according to the manufacturer's instructions.

  7. Sand the Area: Once the joint compound is dry, sand the area with sandpaper or a sanding block / sanding sponge to create a smooth, seamless finish. Be sure to remove any excess joint compound and smooth out any ridges or bumps.

  8. Prime and Paint: Before painting, apply a coat of primer to the repaired area. This will help the paint adhere properly and create a consistent finish. Once the primer is dry, paint the area to match the surrounding wall.

Metal Drywall Corner Bead

Composite Corner Beads: Levelline and Strait-Flex

Composite corner beads, such as Levelline and Strait-Flex, offer a versatile and easy-to-use alternative to traditional metal or plastic corner beads. These products are made from a combination of materials, making them flexible, durable, and resistant to cracking. Because composite corner beads are flexible, they are easier to install, especially on curved or irregular surfaces, while still providing a professional finish.

Installing Composite Corner Beads

To install composite corner beads, follow these general steps:

  1. Cut the corner bead to the desired length using a utility knife or scissors.
  2. Apply a layer of joint compound to both sides of the corner, ensuring that it extends beyond the corner bead's width.
  3. Press the composite corner bead into the joint compound, making sure it is centered and flush with the drywall.
  4. Use a taping knife to smooth out the joint compound, removing any excess and ensuring a tight bond between the corner bead and the drywall.
  5. Allow the joint compound to dry according to the manufacturer's instructions before applying additional layers, sanding, and painting.

For a more in-depth guide on installing Levelline and Strait-Flex composite corner beads, stay tuned for our upcoming blog post!

Preventing Future Damage

To prevent future damage to your drywall corners, consider installing corner guards or using furniture pads to protect them from impact. Additionally, address any water leaks promptly to prevent water damage.

Frequently Asked Questions (FAQs)

How do you know if drywall cracks are serious?

While most drywall cracks are cosmetic and can be easily repaired, some cracks may indicate a more significant issue, such as structural damage or a water leak. If the cracks are accompanied by other signs of damage, such as bulging walls, mold, or a musty smell, it is essential to consult a professional to assess the situation.

Can I repair a damaged drywall corner without replacing the corner bead?

Yes, you can repair minor damage to a drywall corner by applying joint compound directly to the damaged area, without replacing the corner bead. However, if the corner bead itself is damaged or the damage is extensive, it's best to replace it.

What type of corner bead should I use for my repair?

Both metal and plastic corner beads are suitable for drywall repairs. Metal corner beads are more durable and may provide better protection against future damage, while plastic corner beads are easier to work with and less prone to rusting.

How long should I wait between applying joint compound and sanding?

The drying time for joint compound can vary depending on the manufacturer's instructions, humidity, and temperature. Generally, it's best to wait at least 24 hours before sanding to ensure the compound is completely dry.


Repairing damaged drywall corners is a straightforward process that you can accomplish with the right tools and materials. By following the steps outlined in this article, you can restore your drywall corners to their original condition and prevent future damage. With a bit of patience and attention to detail, you can achieve a professional-looking result. At Timothy's Toolbox, we offer a wide range of drywall tools for both professionals and DIYers to help you complete your drywall repair projects with ease. Check out our selection today!

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