Introduction
Have you ever patched a crack in your drywall, only to have it reappear a few weeks later? It’s frustrating, isn’t it? The crack keeps returning no matter how well you sand and paint over it.
As a drywall professional, I’ve seen homeowners struggle with recurring drywall cracks far too often. I once helped a couple who had patched the same cracks three times before calling me. The problem? They were fixing the symptom, not the cause.
Not all drywall cracks are the same—some are harmless, while others are warning signs of more significant structural issues. In this article, I’ll explain why drywall cracks happen, how to tell if they’re serious, and—most importantly—how to fix them correctly so they don’t come back!
What Causes Drywall Cracks?
Drywall cracks don’t just happen randomly—there’s always a reason behind them. Understanding why they’re happening is the first step to fixing them permanently.
1. Normal House Settling
- Every home naturally shifts over time due to soil movement and seasonal changes.
- Cracks above doorways and windows are common, as these are stress points in your walls.
- Fix it? These are usually cosmetic and can be patched easily. But if the cracks widen over time, it could be a bigger issue.
Real-Life Example: A homeowner I worked with kept patching a tiny crack above their doorway. The problem? Their house was settling slightly, causing repeated stress in the same spot. The solution? Using flexible joint compound that could handle minor movement.
2. Poor Drywall Installation
- If drywall wasn’t properly secured or too much joint compound was used, cracks can form as the material shrinks and shifts.
- Drywall seams that were improperly taped often crack first.
How to Fix It Right:
Remove loose or bubbled tape and reapply fiberglass mesh tape (stronger than paper tape).
Apply thin layers of joint compound, allowing each to dry before adding the next.
Pro Tip: Never use just one thick layer of mud—it will shrink as it dries, leaving a crack behind.
3. Temperature & Humidity Changes
- Drywall expands and contracts with temperature swings, especially in homes without proper insulation.
- If your home experiences dry winters and humid summers, drywall movement can lead to seasonal cracks.
How to Fix It Right:
Use a flexible, crack-resistant joint compound designed to move with the wall.
Keep humidity levels consistent with a dehumidifier.
Real-Life Example: A homeowner patched seasonal cracks in their living room. The cracks stopped appearing after sealing gaps in their insulation and adding a dehumidifier!
4. Structural Issues (The Red Flag Cracks!)
- Large cracks wider than ¼ inch or diagonal cracks could mean serious foundation problems.
- If cracks are accompanied by sagging drywall, sticking doors, or uneven floors, don’t ignore them.
What to Do:
Mark the crack with a pencil and monitor it for a few weeks—if it grows, call a foundation expert.
If your home is older and settling more aggressively, you might need reinforcement before drywall repairs.
Pro Tip: A sudden, large crack appearing overnight could mean a structural shift—get it checked ASAP!
How to Fix Drywall Cracks the Right Way (Step-by-Step Guide)
If your crack isn’t caused by major structural issues, you can fix it permanently by following these simple steps.
Step 1: Prep the Area
Remove loose debris or old tape from the cracked area.
Sand lightly to create a smooth surface for the patch.
Pro Tip: If the crack runs along a drywall seam, remove any bubbled or peeling tape before proceeding.
Step 2: Apply Fiberglass Mesh Tape (For Seam Cracks)
Why? Fiberglass mesh tape is stronger than paper tape and helps prevent future cracking.
Place the tape directly over the crack, pressing it down firmly.
Alternative: If the crack is isolated and not along a seam, skip this step and proceed straight to the joint compound.
Step 3: Apply Joint Compound the Right Way
Use a 6-inch taping knife to spread a thin layer of joint compound over the tape.
Let it dry completely, then apply two more thin coats, feathering the edges wider each time.
Lightly sand between coats for a seamless finish.
The repair held up for years when they switched to multiple thin layers. Real-Life Example: A homeowner tried fixing their crack with one thick layer of mud, and it cracked again within a month. When they switched to multiple thin layers, the repair held up for years!
Step 4: Prime & Paint for a Flawless Finish
Always prime repaired areas first—paint absorbs differently on patched drywall.
Use matching paint and feather it outward for an invisible repair.
Pro Tip: If your wall has texture, use a sponge or spray texture before painting to match the original finish.
How to Prevent Future Drywall Cracks
Don’t Just Fix the Crack—Prevent It!
Use flexible joint compound in areas prone to movement.
Control humidity with a dehumidifier to prevent drywall expansion/contraction.
Ensure drywall is properly secured—loose screws and nails lead to cracking.
Check for foundation issues if cracks keep returning.
Real-Life Example: One homeowner had the same cracks appear every year. The issue? Their foundation was slowly shifting. Until they reinforced it, the drywall repairs were just temporary.
Conclusion: Don’t Ignore Drywall Cracks—Fix Them Right!
Drywall cracks aren’t just annoying—they can signal bigger issues. Whether it’s from house settling, poor installation, or structural problems, identifying the cause is the key to fixing them for good.
Key Takeaways:
Determine the cause—settling, poor installation, humidity, or structural issues.
Use the right repair method—fiberglass tape for seams, thin coats of joint compound, and proper sanding.
Monitor serious cracks—if they grow, call a professional.
Prevent future cracks with flexible compound, humidity control, and secure drywall installation.
Now that you know how to fix drywall cracks correctly, your walls can stay flawless for years!
Frustrated with drywall cracks that won’t go away? Let the experts handle it!
Call us today for a professional drywall inspection and repair. Whether it’s a minor fix or a sign of a bigger issue, we’ll get your walls looking flawless—permanently!
Don’t wait until a small crack becomes a big problem—schedule your repair today!