Notice a line creeping across your wall? It’s probably a drywall crack. Most homeowners see them and wonder if it’s a big problem or just a cosmetic issue. The good news is that many cracks are easy to fix yourself, but some signal deeper issues that need a professional’s eye.
First, know why the crack appeared. The most common reason is movement in the house’s structure. As the foundation settles, the framing shifts a little, and the drywall – which is thin and brittle – cracks. Temperature changes can also cause drywall to expand and contract, especially in rooms with poor insulation.
Humidity plays a big role too. If a bathroom or kitchen gets too moist, the plaster can absorb water and weaken, leading to hairline cracks. Some cracks appear around windows and doors because those openings move with the house’s frame.
Even simple things like hanging a heavy shelf or TV can stress the drywall. When you drill into a stud, the surrounding board can flex and split over time. Knowing the cause helps you decide if a quick patch will hold or if you need to address the underlying movement.
Got a small crack under 1/4 inch wide? You can handle it with a few tools: a utility knife, joint compound, a putty knife, sandpaper, and paint. Here’s the quick plan:
If the crack is wider than 1/4 inch, add a piece of drywall tape before the first coat of compound. The tape holds the two sides together and prevents the crack from reopening.
For cracks that follow a long seam, consider re‑securing the drywall to the studs with screws. Loose screws can cause recurring cracks, so tightening them can stop future damage.
Even after a good DIY job, keep an eye on the spot for a few weeks. If the crack reappears, the movement is probably ongoing and you’ll need a pro.
When you notice cracks near doors, windows, or in corners, it’s a sign the framing is shifting more than usual. In those cases, a professional can assess the foundation, check for moisture issues, and recommend proper repairs – which might include adding bracing or improving ventilation.
Bottom line: small, isolated cracks are usually a quick DIY win. Bigger or repeating cracks mean it’s time to call a qualified plumber or builder who can look at the bigger picture and keep your home safe and sound.
