Drywall corners are particularly vulnerable to damage, especially in high-traffic areas. When a drywall corner is coming apart, it doesn’t just look messy; it can worsen if left unaddressed. This guide walks you through how to repair a drywall corner that’s coming apart, covering everything from causes to tools and a step-by-step process to help you get a clean, durable finish.
Why Do Drywall Corners Come Apart?
To understand how to repair a drywall corner that’s coming apart, it’s essential to know why it happens in the first place. Drywall corners tend to weaken over time for several reasons:
- House Settling: Houses naturally shift and settle over time, leading to stress on drywall corners and joints.
- Moisture Damage: High humidity or exposure to moisture loosens the joint compound or tape, especially in bathrooms or kitchens.
- Physical Impact: High-traffic areas can take a beating from everyday activities, causing corners to crack, dent, or loosen over time.
Knowing the root cause of a damaged corner will help prevent it from recurring after repair.
Tools and Materials Needed to Repair a Drywall Corner That’s Coming Apart
Proper tools and materials are essential for a smooth, professional repair. Here’s what you’ll need:
- Corner bead (either metal or paper-faced)
- Drywall joint compound (also known as “mud”)
- Drywall tape
- Utility knife
- 6- and 10-inch drywall taping knives
- Sanding block or sandpaper (120-220 grit)
- Primer and matching paint
- Drywall screws (if using metal corner bead)
- Screwdriver or drill
- Drop cloth
- Damp sponge or cloth
Having all these tools and materials at hand will make the repair of a drywall corner that’s coming apart a smooth process.
Step-by-Step Guide on How to Repair a Drywall Corner That’s Coming Apart
Follow these steps to repair a drywall corner that’s coming apart and achieve a solid, professional result.
Step 1: Prepare the Damaged Area
Preparing the area correctly ensures the repair holds well.
- Remove Loose Material: Use a utility knife to carefully cut away any peeling drywall tape, loose joint compound, or damaged corner bead. Be gentle to avoid enlarging the damaged area.
- Smooth the Edges: Sand the rough edges around the damaged area for better adhesion of the new compound.
- Clean the Area: Wipe away dust and debris with a damp cloth or sponge. A clean surface improves the adherence of the compound and tape.
Step 2: Replace or Reinforce the Corner Bead
The corner bead is essential in repairing a drywall corner that’s coming apart since it shapes and reinforces the corner.
Choosing the Right Corner Bead:
- Metal Corner Bead: Very durable and impact-resistant, but slightly more challenging to install.
- Paper-Faced Metal Bead: Easier to work with and adheres well to joint compound, making it a popular choice for DIY repairs.
Install the New Corner Bead:
- Metal Bead Installation: Attach the metal corner bead with drywall screws every 8–10 inches. Make sure the screws sit flush with the wall.
- Paper-Faced Bead Installation: Apply a thin layer of joint compound where the bead will go, then press it into place. Smooth out any extra compound with your taping knife.
Step 3: Apply Drywall Tape and Compound
Once the corner bead is secure, it’s time to add drywall tape and compound, which are key to how to repair a drywall corner that’s coming apart and achieve a smooth finish.
- First Layer of Joint Compound: Apply a thin layer of joint compound along the edges of the corner bead. Use a 6-inch knife to spread it evenly over the bead and onto the drywall.
- Adding Drywall Tape: If the corner bead doesn’t include tape, add a strip along the edges to strengthen the bond. Press the tape smoothly with your knife to avoid air bubbles or wrinkles.
- Second Layer of Compound: After the first layer dries (around 24 hours), apply a second, slightly wider layer with a 10-inch knife. Feather out the compound to blend the repair with the surrounding drywall.
- Final Layer and Feathering: Apply a third, thin layer of compound, feathering it 4–6 inches past the previous layer to achieve a smooth finish. Let this dry completely before moving to sanding.
Step 4: Sand the Surface for a Smooth Finish
Sanding is critical to achieving a seamless repair and ensuring a drywall corner that’s coming apart looks as good as new.
- Use Fine-Grit Sandpaper: With a sanding block or fine-grit sandpaper (120-220), sand down the repaired area to remove any bumps. Sand lightly to avoid damaging the fresh compound.
- Check for Imperfections: Use your hand to feel the surface and identify any areas that need additional smoothing.
- Cleanup: Wipe down the area with a damp cloth to remove dust before priming and painting.
Step 5: Prime and Paint the Repaired Area
Priming and painting finish off the repair and protect the area.
- Apply Primer: Use a drywall primer over the patched area to ensure the paint adheres evenly. Priming also prevents the joint compound from absorbing paint differently than the rest of the wall.
- Paint the Corner: Once the primer is dry, apply two coats of matching paint. Use a small brush for precision and even coverage on the corner. This step completes the look and protects the repaired drywall corner.
Tips for Preventing Future Damage to Drywall Corners
Knowing how to repair a drywall corner that’s coming apart is valuable, but preventing damage can save you from repeated repairs. Here are some practical prevention tips:
- Install Corner Protectors: In high-traffic areas, consider using plastic or metal corner protectors. These provide a physical barrier that absorbs impact and prevents damage to the drywall.
- Monitor Humidity Levels: In rooms with high humidity, like bathrooms, keep an eye on moisture levels to avoid weakening the joint compound.
- Educate on Safe Practices: Inform family members and roommates about the importance of avoiding direct impacts on corners. A little awareness goes a long way.
Frequently Asked Questions About Repairing Drywall Corners
Can I use mesh tape instead of paper tape on drywall corners?
Yes, mesh tape can be used, but paper tape is often preferred for corners due to its stronger bond with joint compound.
What if my drywall corner has mold damage?
Address any mold issues before repairing the drywall. Remove affected drywall sections, treat the underlying area, and then follow the repair steps.
How long does joint compound take to dry?
Drying times vary, but standard joint compounds typically dry in 24 hours. Quick-drying compounds are also available and can set in as little as 45 minutes.
Can I repair a corner without using a corner bead?
While minor repairs might hold without a corner bead, for lasting durability, using a corner bead is strongly recommended.
Final Thoughts on How to Repair a Drywall Corner That’s Coming Apart
Repairing a drywall corner that’s coming apart is a straightforward task that can improve both the look and durability of your home. By following these steps, using the right materials, and taking your time, you can save on repair costs while achieving professional-quality results. Remember, a strong base, proper installation, and careful application of joint compound are the keys to a lasting repair. With these tips, your drywall corners can stay looking sharp and intact for years to come.