How to Repair Drywall Cracks: A Beginner’s Guide

Noticed an ugly crack creeping across your drywall? Left untreated, small fractures can expand into major eyesores that ruin your home’s appearance and even compromise structural integrity. The right drywall crack repair can restore smooth walls permanently. In this guide, we’ll cover step-by-step techniques using affordable tools like joint compound and mesh tape. For stubborn stains after repairs, consider our recommended wall cleaning solutions.

Key Takeaways

• Use fiberglass tape for durable crack bridging
• Layer thin coats of joint compound for seamless blending
• Sand between coats to achieve professional-grade smoothness
• Prime before painting to prevent uneven absorption

1. Assess the Damage

Identify whether you’re dealing with a hairline crack (less than 1/8 inch) or a structural crack (wider than 1/4 inch). Hairline cracks often result from settling, while wider gaps may indicate foundation issues. Check for:

• Crumbling edges
• Moisture stains
• Recurring cracks

For moisture-related damage, resolve leaks before repairs. Structural cracks may require professional evaluation.

2. Gather Your Tools

You’ll need:

• Joint compound (lightweight for beginners)
• Fiberglass mesh tape (self-adhesive for easier application)
• Putty knife (6-inch for small cracks, 10-inch for larger areas)
• Sandpaper (120-grit for smoothing)

Pro Tip: Keep a utility bucket nearby for quick cleanups.

3. Prepare the Crack

Undercut the edges with a utility knife to create a V-shaped groove, improving compound adhesion. Remove dust using a stiff brush or vacuum. For stubborn debris, wipe with a damp cloth—just ensure the area dries completely before proceeding.

4. Apply Tape and Compound

Press self-adhesive mesh tape over the crack. Using a putty knife, spread a thin layer of joint compound over the tape, feathering the edges outward. Avoid common mistakes:

• Applying too thickly (causes cracking)
• Skipping tape (allows cracks to reappear)

5. Sand and Finish

Once dry (typically 24 hours), sand with 120-grit paper until smooth. Apply a second thin coat, extending 2 inches beyond the first layer. After drying, sand again with 220-grit for a polished finish. Wipe away dust with a microfiber cloth.

6. Prime and Paint

Use a stain-blocking primer to prevent joint compound discoloration. Match your wall paint—eggshell or satin finishes hide imperfections best. For textured walls, replicate the pattern using a sponge or specialized roller.

Drywall Crack Repair Comparison

Final Thoughts

With patience and proper technique, drywall crack repairs can be DIY-friendly. For extensive damage or recurring issues, consult a professional. Remember: Quality materials like USG Sheetrock compounds yield longer-lasting results than bargain brands. Need to clean surrounding areas afterward? Explore our floor cleaning solutions for spotless results.