Though invisible behind the outer parts of your wall, drywall does a lot to support your home.
And because you don't see it often, drywall damage is one of the most overlooked maintenance issues homeowners face.
Small cracks, dents, or stains might seem harmless at first, but ignoring them can lead to costly repairs and health hazards like mold.
Many surface issues can be fixed with spackle, a good sanding, and a fresh coat of paint, but it's what's caused the damage that deserves your real attention.
In this blog, we'll uncover the top five causes of drywall damage, and why recognizing them early could save you lots of time and money.
Water Damage
Water damage is one of the most serious threats to drywall, and it doesn't take much for moisture to start doing damage.
Drywall isn't waterproof, so even a small leak can cause deterioration over time.
Symptoms
• Stains or discoloration (brown or yellow)
• Bulging or warped sections of the wall
• Crumbling drywall that falls apart when touched
Causes
• Leaky roofs or ceilings
• Burst or leaking pipes
• Poor ventilation in bathrooms and kitchens
• Condensation from high humidity
Damp drywall is a breeding ground for mold and mildew, which can trigger allergies and respiratory problems.
Water-damaged walls weaken the structure and may lead to expensive repairs.
You'll need to call a professional to access the damage. Wet or bulging drywall needs to be replaced rather than patched.
In high-moisture areas, use moisture-resistant drywall for better durability.
It also helps to conduct regular plumbing and roofing inspections to catch leaks early and prevent recurring issues.
Structural Movement
Cracks around door frames and windows start small and widen over time, pointing to problems beyond the surface.
If ignored, they can compromise both the look and safety of your home.
Symptoms
• Thin cracks near doors or windows
• Cracks that expand or lengthen over time
Causes
• Foundation settling
• Structural shifting due to environmental or construction factors
• Poorly taped or finished drywall joints
Beyond being a cosmetic issue, cracks hint at structural issues that can worsen without intervention.
Gaps in drywall can also allow moisture to enter, increasing the risk of mold growth.
To fix this issue, reinforce the area with the right materials and techniques.
That means looking at the way the drywall is installed, which often necessitates a professional.
Impact Damage
Everyday life takes its tolls on your walls, especially in high-traffic areas.
Over time, impact damage can weaken the drywall and create a worn, uneven appearance.
Symptoms
• Scuff marks or surface abrasions
• Small holes from door handles, furniture, or toys
• Minor craters where the outer layer has been compromised
Causes
• Moving furniture too close to walls
• Doors swinging open too forcefully
• Rough play or toys hitting the walls
• General wear and tear over time.
Repeated impact damage can chip away at the drywall's integrity and make it more vulnerable.
A professional patch job keeps repairs blended with the rest of the wall.
Installing door stoppers and keeping furniture slightly away from the walls can prevent damage.
For childproofing tips, check Canada Safety Council – Home Safety.
Pest Damage
Pests, like rodents and insects, can chew through drywall. They can go unnoticed until serious damage is already done.
Symptoms
• Tiny pinholes or gnaw marks on walls
• Hollow-sounding sections when tapped
• Visible tunnels or powdery residue
Causes
• Termites and carpenter ants burrowing through drywall
• Rodents chewing to access food or nesting areas
If left untreated, pests can compromise wall strength and even lead to structural issues.
Worse, infestations can lurk in walls for months before anyone notices.
Always address the root of the issue first, and in this case, hire licensed exterminators to get rid of the pests.
Once the infestation is gone, patch and repair any holes or tunnels left behind.
In older homes or homes in areas prone to infestations, it's best to schedule regular pest inspections to mitigate any damage.
Pro tip: To protect your home, refer to the Government of Canada’s Pest Management Tips for prevention and safe pest control.
Improper Installation
Even if the wall looks fine at first glance, improper installation can set the stage for future problems.
Over time, flaws in technique or materials start to show.
Symptoms
• Nail or screw pops pushing through the surface
• Sagging or wavy sections of drywall
• Warping panels that don't sit flush
• Cracks or gaps from poorly-taped joints
Causes
• Rushed or careless installation
• Skipping studs or using too few fasteners
• Low-quality or inappropriate materials
Drywall that isn't properly installed is more likely to crack, shift, or collapse under pressure.
If the damage is widespread, you may need to tear out and reinstall entire sections.
To avoid these issues, If you're hiring a contractor, the Canadian Home Builders' Association offers a directory of trusted professionals and guidance on finding qualified help.
Final thoughts
Addressing drywall damage early is important—not just for how your home looks, but for its long-term safety.
What seems like a small issue could point to something more serious, like hidden leaks or pest problems.
That’s why calling in a professional for inspection and home repairs can save you time, money, and stress later on.
Need Help With Drywall Repair?
Whether it’s a crack, bulge, or full replacement, Complete Casa Construction has the experience to get it done right. Call (289) 929-8988 or contact us today to schedule a free quote and inspection.
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