How To Fix Cracks in Drywall
You likely don’t pay much attention to your drywall. But all it takes is one hairline fracture snaking across the wall and your entire flawless aesthetic is thrown off. Besides bemoaning, “Why?” you may also be asking yourself, why does drywall crack in the first place? While you may not be able to control the fissure fate of your walls, knowing the cause of your drywall defect can help as you learn how to fix cracks in drywall. Mr Handyman® has put together this step-by-step drywall repair guide to fix cracks you may be finding unsightly in your home.
How to Repair Drywall Cracks
Drywall cracks are not something you want to ignore since they can worsen over time if not properly addressed. The way you tackle the eyesore will depend on its size and shape. If damage is minor and localized, a repair is likely enough and cracks should not return. But if it covers a large area or affects the wall’s integrity, replacement is the better long-term solution.
Repair drywall
- Repair small cracks or hairline fractures that have likely been caused by normal settling, temperature fluctuations, or minor movement with joint compound, drywall tape, and sanding.
- Address small holes (under 6 inches) stemming from nails, screws, doorknob dents, or accidental impacts with a drywall repair kit or joint compound.
- Make screw/nail pops disappear by covering them with joint compound after removing and re-screwing them.
- Determine how to deal with minor water damage that’s caused by leaky pipes, roof leaks, or condensation by pressing on the drywall with your fingers. If the drywall is only stained but not soft, it can be dried out and repainted. If it feels soft or crumbles, replacement is the safest option.
Replace Drywall
Instances where a drywall fix won’t get you far and call for a full replacement include:
- Large holes (Over 6 Inches)
- Extensive water damage (soft, swollen, or moldy drywall)
- Multiple or widespread cracks
- Cracks that keep reappearing
- Structural damage
Tools and Materials Required to Fix Your Drywall
Fortunately, minor cracks in drywall are generally painless to repair. But before you learn how to fix cracks in drywall, you need to know what tools and materials are required. Here’s what you will need for a drywall DIY fix:
Tools
You should gather:
- Mud pan
- Utility knife
- 6-inch putty knife
- 12-inch taping knife
Materials
And these materials:
- Paper, mesh, fiberglass drywall tape
- Pre-mix joint compound (for smaller cracks)
- Setting compound (for deeper cracks)
- Painters’ tape (optional)
How To Fix Cracks In Your Drywall: A Step-By-Step Guide
Once you have everything in hand, follow the simple steps below to learn how to fix cracks in drywall. Whether to use pre-mixed or setting joint compound will depend on the type of crack you’re repairing as outlined above.
Step 1: Prepare the area
If the crack is near any woodwork or trim, cover it with painter’s tape to protect the surface. Next, use the utility knife to cut a v-shape notch the entire length of the crack. Clear any debris from the cut (a shop vac could be handy).
Step 2: Apply drywall tape
Apply 1/8 inch of the appropriate compound over the crack and embed a strip of drywall tape. Use the 6-inch putty knife to squeeze out excess compound and air from the strip of tape. Smooth out a thin layer of compound over the top of the strip, extending a few inches of the compound on each side of the strip. Letting it dry completely may require you to leave taking next steps the following day.
Step 3: Add additional layers and smooth it out
The next day, after the compound has fully dried, scrape off any excess or rough spots with the putty knife. Employ the 12-inch taping knife to apply a second or third layer of compound over the tape. Use long strokes to smooth out the compound. Feather it out 5 to 6 inches beyond each side of the tape. Once again, let dry (possibly overnight,) and then scrape off or sand any dry particles before priming and painting.
As you’re working on fixing your drywall cracks, you may be wondering what led to the damage in the first place.
Why Does Drywall Crack?
Drywall is most likely to fracture at the seams where two sections of drywall converge. These joints are the weakest points of the wall and are the most susceptible to any upsets. There are many stresses that can cause the seams to crack.
Temperature and humidity changes can cause the drywall to expand and contract, exerting pressure on seams. This is common in vacation homes that are not climate-controlled full-time.
The settling of the dwelling itself can also be behind drywall cracks. This type of damage is usually identified by vertical cracks extending along the corners, windows, or door jambs of the room and may be common in either new build or older homes as they settle on the foundation.
Poor or faulty installation may also be the root cause of a drywall fracture. A thin, straight crack in the drywall could be the result of drywall seams that are either improperly taped or were not covered sufficiently with drywall compound.
Take the time to investigate the source of the drywall stress before mending the wall to avoid repeated drywall repairs.How To Prevent Drywall Cracks
Fixing drywall cracks is one thing—keeping them from coming back is another. To prevent future cracks, consider these key strategies:
Control indoor climate
Fluctuations in temperature and humidity cause drywall to contract and expand, which can cause cracking over time. To minimize movement:
- Maintain consistent humidity: Use a humidifier in dry months and a dehumidifier when it's humid to keep indoor moisture levels stable.
- Regulate temperature changes: Avoid drastic shifts by keeping your thermostat at a steady temperature, especially during seasonal changes.
Reinforce high-stress areas
Certain spots—like door frames, window corners, and ceilings—are more prone to cracks due to structural movement. Prevent issues by:
- Using flexible caulking: For minor gaps and stress points, a high-quality, paintable caulk can absorb small shifts.
- Installing mesh or fiberglass tape: When repairing cracks, reinforce seams with fiberglass tape instead of paper tape for added durability.
Ensure proper drywall installation
Poor installation techniques can set the stage for future cracks. If you're renovating or repairing drywall:
- Doors and windows sticking: Secure drywall panels correctly to prevent shifting over time.
- Multiple or widening cracks: Sanding too aggressively can weaken seams, making them more prone to cracking.
Address structural issues early
If cracks keep coming back, they could be a symptom of a larger problem. Watch for signs like:
- Doors and windows sticking: This could indicate foundation shifts affecting your walls.
- Multiple or widening cracks: If cracks are growing or appearing in different areas, consult a professional to assess structural concerns.
Professional Drywall Repair
A fracture in your wall can be a downer, but it doesn’t have to be the demise of your pleasant interior space. Understanding why drywall cracks and narrowing down your particular cause can prevent the need for future repairs. Gather the proper tools, take your time, and that hairline fracture will be history! Still not sure how to fix cracks in drywall? Give the experienced service professionals at Mr. Handyman a call today or request an appointment to handle your drywall repair and more!
What’s more, we’re backed by the Neighborly Done Right Promise® to ensure your satisfaction. Give us a call or request an estimate today.
This article is intended for general informational purposes only and may not be applicable to every situation. You are responsible for determining the proper course of action for your home and property. Mr. Handyman is not responsible for any damages that occur as a result of this blog content or your actions. For the most accurate guidance, contact your local Mr. Handyman location for a comprehensive, on-site assessment.