How To Fix Cracks In Drywall?

Dealing with cracks in drywall can be frustrating, but with the right techniques, you can repair them effectively. Whether you’re facing minor hairline fractures or larger gaps, knowing how to fix drywall cracks can save you time and money.

In this comprehensive guide, we’ll walk you through the process, from gathering the necessary tools to applying the final coat of paint. Learn the best practices for repairing drywall and ensure your walls look flawless once again.

Causes of Cracks in Drywall

cracks in drywall

Drywall is most likely to crack at the seams where two sections of drywall meet. These joints are the weakest points of the wall and are particularly vulnerable to various stresses that can cause cracking.

One common cause is temperature changes, which can make the drywall expand and contract, putting pressure on the seams. This is often seen in vacation homes that are not climate-controlled year-round.

Another cause of drywall cracks is the settling of the house itself. This type of damage is typically characterized by vertical cracks along corners, windows, or door jambs, and can occur in both new and older homes as they settle on their foundations.

Faulty installation can also lead to drywall cracking. The narrow, straight cracks in the drywall could be due to seams that were not properly taped or covered with enough drywall mud.

Before repairing the drywall, take the time to investigate the source of the stress to prevent needing to make repairs again.

How to Repair Cracks in Drywall

If the damage is more than a slight crack and is wider than ¼ inch, the entire drywall panel may need to be replaced or a more extensive repair undertaken. Fortunately, repairing minor cracks and hairline fractures in drywall is generally straightforward. Here’s what you’ll need for a DIY drywall fix:


  • Mud pan
  • Utility knife
  • 6-inch putty knife
  • 12-inch taping knife


  • Paper drywall tape
  • Pre-mixed joint compound
  • Setting compound
  • Painter’s tape (optional)

Step-by-Step Drywall Crack Repair

Step 1: Prepare the Area

  • Protect Surroundings: Cover any nearby woodwork or trim with painter’s tape to avoid getting compound on it.
  • Notch the Crack: Use a utility knife to cut a v-shaped notch along the entire length of the crack. Clear any debris from the cut using a shop vac.

Step 2: Apply Drywall Tape

  • Apply Joint Compound: Spread 1/8 inch of joint compound over the crack.
  • Embed Drywall Tape: Press a strip of drywall tape into the compound.
  • Smooth Out Excess: Use a 6-inch putty knife to remove excess compound and air from under the tape.
  • Top Layer: Apply a thin layer of joint compound over the top of the tape, extending a few inches on each side. Allow it to dry completely.

Step 3: Smooth and Finish

  • Scrape and Smooth: Once dry, scrape off any excess or rough spots with the putty knife.
  • Apply Additional Layers: Use a 12-inch taping knife to apply a second or third layer of joint compound over the tape.
  • Feather Out: Smooth the compound with long strokes, feathering it out 5 to 6 inches beyond each side of the tape.
  • Final Prep: Let it dry again, then scrape off or sand any dry particles before painting.

Professional Drywall Repair

A crack in your wall can be a disappointment, but it doesn’t have to ruin your pleasant interior space. By understanding why drywall cracks and identifying the specific cause, you can prevent the need for future repairs. Collect the necessary tools, take your time, and that hairline fracture will be a thing of the past!

Still not sure how to repair drywall cracks? Give the professionals at ROA Drywall a call today or request an appointment online for expert drywall repair and more!

Leave a Comment

Your email address will not be published. Required fields are marked *