DIY Guide: Easy Steps to Repair Cracked Corners of Walls

Published On: May 27, 20240 Comments on DIY Guide: Easy Steps to Repair Cracked Corners of WallsTags: Last Updated: May 27, 20248 min read
Are the cracked corners of your walls driving you crazy? Don’t worry, you’re not alone. Cracked corners can be a common problem in many homes, but the good news is that you can easily repair and restore them yourself. In this DIY guide, we will share some easy steps to help you tackle this issue and restore the beauty of your walls.

First, you will need to assess the severity of the cracks. Are they minor or more extensive? Once you’ve determined the level of damage, you can move on to the repair process. From preparing the cracked area to applying the right materials and techniques, we will walk you through each step to ensure a successful restoration.

Restoring cracked corners not only improves the aesthetics of your walls but also prevents further damage and potential safety hazards. By following our expert advice and using the right tools, you can fix those cracks and regain the smooth and flawless look of your walls.

Say goodbye to unsightly cracks and hello to beautifully restored corners with our easy-to-follow DIY guide. Let’s get started!

Common Causes of Cracked Corners

Before we dive into the repair process, let’s first understand why cracked corners happen in the first place. There are several common causes that can lead to cracked corners in your walls.

One of the most common causes is settling or shifting of the foundation. Over time, the ground beneath your home can shift, causing the walls to move and crack. Additionally, changes in temperature and humidity levels can also contribute to cracking, as the materials expand and contract.

Another possible cause is poor construction or inadequate structural support. If the corners were not properly reinforced during the initial construction or renovation, they may be more susceptible to cracking.

Lastly, if there is a lot of movement or traffic near the corners, such as furniture being bumped into them or children running around the house, it can put extra stress on the walls and lead to cracks.

cracked wall corner

Now that we have a better understanding of why cracked corners occur, let’s move on to the repair process.

Tools and Materials Needed for the Repair

Before you start repairing the cracked corners, it’s important to gather the necessary tools and materials. Here’s a list of what you’ll need:

  1. Putty knife or scraper: Used for removing loose debris and old paint from the cracked area.
  2. Sandpaper or sanding block: Helps in smoothing the repaired area and blending it with the surrounding wall.
  3. Joint compound: Used for filling and patching the crack.
  4. Mesh tape or paper tape: Provides additional reinforcement to prevent future cracking.
  5. Primer: Prepares the repaired area for painting.
  6. Paint: Matches the color of your walls for a seamless finish.
  7. Paintbrushes and rollers: Used for applying primer and paint.

Make sure to have these tools and materials ready before you begin the repair process. Now, let’s move on to the next step.

Preparing the Cracked Corner for Repair

The first step in repairing cracked corners is to prepare the area for the repair. Start by using a putty knife or scraper to remove any loose debris, old paint, or wallpaper from the cracked corner. This will ensure that the joint compound adheres properly to the surface.

Next, use sandpaper or a sanding block to smooth the edges of the crack and create a slightly rough surface. This will help the joint compound adhere better and create a seamless finish.

Once you’ve prepared the cracked corner, it’s time to move on to filling and patching the crack.

Filling and Patching the Crack

To fill and patch the crack, you’ll need to use joint compound. Joint compound, also known as drywall mud, is a versatile material that is commonly used for repairing cracks and holes in walls.

Start by applying a thin layer of joint compound to the crack using a putty knife or scraper. Make sure to press the compound firmly into the crack, ensuring that it fills the entire space. Then, use the putty knife to smooth the surface, removing any excess compound.

After the first layer has dried, apply a second layer of joint compound to the crack. This layer should be slightly wider than the first layer, extending about an inch on each side of the crack. Again, use the putty knife to smooth the surface and remove any excess compound.

Repeat this process until the crack is completely filled and the surface is smooth. Allow the joint compound to dry completely before moving on to the next step.

patching the crack on wall corner



Sanding and Smoothing the Repaired Area

Once the joint compound has dried, it’s time to sand and smooth the repaired area. Start by using fine-grit sandpaper or a sanding block to gently sand the surface of the repaired area. This will help blend the repaired section with the surrounding wall, creating a seamless finish.

Be careful not to apply too much pressure while sanding, as this can damage the repaired area and create uneven surfaces. Sand in a circular motion, gradually smoothing out the surface until it feels even and smooth to the touch.

After sanding, use a damp cloth or sponge to wipe away any dust or debris from the sanded area. This will ensure a clean surface for priming and painting.

Priming and Painting the Repaired Corner

Now that the repaired area is smooth and clean, it’s time to prime and paint the corner to match the rest of the wall.

Start by applying a coat of primer to the repaired corner using a paintbrush or roller. Primer helps to seal the repaired area, creating a smooth and even surface for the paint to adhere to. Allow the primer to dry completely before moving on to the next step.

Once the primer has dried, it’s time to paint the repaired corner. Use a paintbrush or roller to apply the paint, making sure to blend it with the surrounding wall for a seamless finish. Apply multiple coats if necessary, allowing each coat to dry before applying the next.

After the final coat of paint has dried, step back and admire your beautifully repaired and restored corner. The cracks are now a thing of the past, and your walls look as good as new.

Preventing Future Cracks in Corners

While you’ve successfully repaired and restored the cracked corners of your walls, it’s important to take preventive measures to avoid future cracking.

One way to prevent future cracks is to ensure that your home’s foundation is properly maintained. Regularly inspect the foundation for any signs of settling or shifting and address any issues promptly.

Additionally, consider reinforcing the corners during any remodeling or renovation projects. Adding extra support, such as corner bead or metal strips, can help prevent future cracking.

Lastly, be mindful of any excessive movement or traffic near the corners. Avoid bumping furniture into the walls and encourage children to be careful when playing near the corners.

By taking these preventive measures, you can minimize the risk of future cracks and maintain the beauty of your walls for years to come.

Frequently Asked Questions About Repairing Cracked Corners

Q: Can I use spackling compound instead of joint compound?

A: Spackling compound is not recommended for repairing large cracks or corners. It is best suited for smaller holes and surface-level repairs. Joint compound provides better adhesion and durability for repairing cracked corners.

Q: How long does it take for the joint compound to dry?

A: The drying time of joint compound depends on several factors, such as humidity and temperature. Generally, it takes about 24 to 48 hours for the joint compound to dry completely. Make sure to check the manufacturer’s instructions for specific drying times.

Q: Can I skip the primer and directly paint the repaired corner?

A: While it is possible to skip the primer, it is not recommended. Primer helps to seal the repaired area, ensuring better adhesion and a smoother finish. It also helps to prevent the paint from soaking into the joint compound, which can lead to discoloration.

Q: How can I match the paint color of the repaired corner with the rest of the wall?

A: To match the paint color, take a small sample of the existing wall paint to a paint store and ask them to match it. They can create a custom paint color that closely matches the existing wall color.

Q: Can I repair cracked corners in wallpapered walls?

A: Yes, you can repair cracked corners in wallpapered walls. Follow the same steps of preparing the cracked area, filling and patching the crack with joint compound, and smoothing the surface. However, keep in mind that you may need to carefully remove the wallpaper around the cracked area and then reapply it after the repair is complete.

Conclusion: Enjoy Your Newly Repaired and Restored Walls

Cracked corners can be a frustrating eyesore, but with the right tools and techniques, you can easily repair and restore them yourself. By following the steps outlined in this DIY guide, you can say goodbye to unsightly cracks and hello to beautifully repaired and restored walls.

Remember to assess the severity of the cracks, gather the necessary tools and materials, prepare the cracked corner, fill and patch the crack with joint compound, sand and smooth the repaired area, prime and paint the corner, and take preventive measures to avoid future cracks.

With a little time and effort, you can transform your cracked corners into seamless parts of your walls.

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