If you’ve lived in Canada long enough, you know it’s only a matter of time before a doorknob punches through drywall, a screw hole gets left behind, or a kid finds a way to put a fist through the wall. Calling a professional can cost $125–$200 just for the service call. The good news? Drywall repair is very much a DIY-friendly job — as long as you match the method to the hole size.
⚠️ Before You Start: Check for Electrical Wiring
Canadian homes run electrical wiring, plumbing, and insulation inside the walls. Before cutting or poking around, use a stud finder with AC wire detection to locate wiring. You can pick one up at Home Depot or Canadian Tire for $20–$40.
Tools & Materials You’ll Need
What you need depends on the size of the repair. Here’s a quick reference:
| Item | Purpose | Approx. Cost (CAD) |
|---|---|---|
| Spackling Paste | Fill small holes | $5–$10 |
| Joint Compound (“mud”) | Medium to large repairs | $10–$20 |
| Drywall Patch Kit | Medium holes (mesh + mud set) | $10–$30 |
| Putty Knife / Taping Knife | Applying compound | $5–$15 |
| Sandpaper (120–220 grit) | Finishing | $3–$8 |
| Drywall Saw | Cutting larger holes | $10–$20 |
| Drywall Screws | Securing backing | $5 |
| Primer + Paint | Final coat | $15–$30 |
Repair Methods by Hole Size
① Small Holes — Nail Pops, Screw Holes (under 1 cm)
Tools needed: Spackling paste, putty knife, sandpaper. Done in 10 minutes.
- Clean dust and debris from around the hole.
- Apply spackling paste with a putty knife, pressing it into the hole.
- Smooth flat with the blade.
- Let dry completely (1–2 hours).
- Sand lightly with 120-grit sandpaper.
- Prime and paint to match.
Tip: Apply two thin coats rather than one thick coat — spackling shrinks as it dries and a thick coat leaves a depression.
② Medium Holes — Quarter to Fist Size (1 cm – 15 cm)
Method A: Self-Adhesive Mesh Patch (recommended for holes under 5 cm)
- Remove loose or crumbling drywall around the edges.
- Stick a self-adhesive mesh patch over the hole (larger than the hole).
- Apply a thin first coat of joint compound over the mesh.
- Let dry 24 hours, apply a second coat feathered slightly wider.
- Dry another 24 hours, sand with 150-grit paper.
- Prime and paint.
Method B: California Patch (best for 5–15 cm holes — stronger and flatter finish)
- Cut a piece of drywall slightly larger than the hole.
- Score and peel the plaster off the back, leaving paper flaps on each side.
- Cut the damaged area into a clean square matching the patch.
- Fit the patch in and press the paper flaps against the surrounding wall.
- Apply joint compound over the seam; 2–3 coats, sanding between each.
- Prime and paint.
③ Large Holes — Bigger Than a Fist (15 cm+)
Large holes need backing support behind the drywall.
- Square off the hole with a drywall saw.
- Install backing strips — 1×3 inch wood strips slid inside and screwed to existing drywall on both sides.
- Cut and fit new drywall to exact size; screw into the backing.
- Tape and mud — apply drywall tape on all four seams, then 2–3 coats of joint compound, feathering wider each time.
- Sand through 120 → 150 → 220 grit (wear a dust mask).
- Prime and paint.
Paint Matching Tips
- Check for leftover paint cans from the previous owner — very common in Canadian homes.
- Home Depot and Benjamin Moore offer paint colour matching: bring a wall chip and they’ll scan it.
- Paint the entire wall rather than just the patch for the most seamless result.
When to Call a Professional
- Water damage — mould risk; fix the leak source first.
- Load-bearing wall damage — may need a building permit.
- Large-scale damage — full room replacement is more cost-effective with a crew.
- Large ceiling repairs — dangerous and difficult solo.
DIY vs. Professional Cost Comparison
| Hole Size | DIY Material Cost | Professional Cost (CAD) |
|---|---|---|
| Nail hole (small) | $5–$10 | $125–$200 (service call minimum) |
| Medium hole (5–15 cm) | $15–$40 | $150–$350 |
| Large hole (15 cm+) | $30–$80 | $300–$650 |
Small repairs offer the biggest DIY savings — paying $125+ for someone to fill a nail hole is never a good deal.
Final Thoughts
Drywall repair is more approachable than it looks. Your first attempt might show a visible seam, but after a couple of tries the technique clicks fast. In Canada, drywall condition gets scrutinized closely during rental inspections and home sales — patching damage ahead of time is always worth the effort.
Next up: how to match drywall texture after a repair. If the surrounding wall has a popcorn or orange peel finish, paint alone won’t hide the patch — that deserves its own guide.
📌 Related post: Drywall Installation Cost in Canada: Complete 2026 Guide