Your roof is one of the most important parts of your home—it shields you from rain, sun, wind, and all sorts of unpredictable weather. But over time, even the toughest roofs can show signs of wear and tear. A few missing shingles, a small leak, or water stains on the ceiling may seem minor at first, but if ignored, they can lead to bigger (and more expensive) problems down the road.
If you’ve noticed a few missing shingles, a small leak, or water stains on your ceiling, it might be time for a repair. In this guide, we’ll show you how to repair a damaged roof safely and effectively, when to call in a professional like JDM Roofing, and how to prevent future problems before they start.

Step 1: Identify the Source of the Damage
Before grabbing your tools, you need to pinpoint what’s wrong. Roof damage can come from a variety of sources—storms, falling branches, age, or even poor installation.
Common signs of roof damage include:
- Missing or cracked shingles: These are clear signs of wear or storm damage.
- Water stains on the ceiling: Usually means there’s a leak somewhere above.
- Sagging areas: Indicates water buildup or structural issues beneath the surface.
- Moss or algae growth: While not always a structural problem, they can trap moisture and accelerate deterioration.
- Dented flashing or damaged vents: Common after hail or heavy winds.
If you can safely access your attic, check the underside of the roof during daylight hours. Look for water stains, black spots (mold), or visible daylight shining through—these are clues that you’ve got a leak.
Step 2: Prioritize Safety Above All
It’s tempting to climb up right away and start patching, but roof work can be risky, even for experienced DIYers. Always think safety first:
- Wear rubber-soled shoes for better grip.
- Use a stable ladder and have someone nearby for assistance.
- Avoid working on wet or icy roofs.
- If your roof is too steep or the damage looks extensive, call a professional roofer instead of risking an accident.
If you’re not comfortable with heights—or if your roof has a steep pitch—don’t push it. Ottawa homeowners can rely on JDM Roofing to handle repairs safely and professionally. They’re fully insured and trained for the conditions we face here in Ontario.
Step 3: Gather the Right Tools and Materials
You don’t need a full construction toolkit to fix minor roof issues, but here’s what you’ll likely need:
- Replacement shingles or roofing material
- Roofing nails
- Hammer or nail gun
- Pry bar
- Roofing cement or sealant
- Caulk gun
- Utility knife
- Roofing tape (for temporary fixes)
Having these ready before you start will save you time and reduce the risk of further damage during the repair.
Step 4: Repair Small Leaks or Holes
Not all leaks require major work. Tiny holes or punctures from nails, branches, or screws can be patched with roofing cement:
- Clean the area around the hole with a brush or rag.
- Apply roofing cement using a putty knife, pressing it firmly into the damaged spot.
- Cover it with a patch of roofing fabric if the hole is large enough to warrant extra reinforcement.
- Apply another layer of cement over the fabric and smooth it out.
This kind of repair works well for tiny punctures caused by nails, screws, or minor wear.
Step 5: Replace Missing or Damaged Shingles
If your roof has visible bare spots, replacing shingles should be a top priority. Even one missing piece can let water infiltrate the underlayment.
Here’s how to do it:
- Lift the surrounding shingles gently using a pry bar.
- Remove the nails from the damaged shingle.
- Slide in a new shingle, aligning it with the others.
- Nail it in place and cover the nail heads with roofing cement to prevent leaks.
Pro tip: If you’re unsure of your roof’s exact shingle brand or color, bring a small sample to your local hardware store or ask JDM Roofing for a match—they use professional-grade materials suited for Ottawa’s tough climate.
Step 6: Fix Flashing and Sealant Issues
Flashing—the metal strips around chimneys, vents, and skylights—helps direct water away from joints. If it’s bent, rusted, or missing, leaks are bound to occur.
To repair flashing:
- Remove old flashing and scrape away any old roofing cement.
- Cut and fit a new flashing piece into place.
- Seal it tightly using roofing cement or high-quality caulk.
Check the sealant around vents, skylights, and chimneys as well. If it’s cracked or peeling, scrape it off and apply a fresh layer.
Step 7: Fix Roof Vent Damage
Roof vents allow hot air to escape from your attic, but if they crack or loosen, they can let in water instead.
Here’s how to repair them:
- Inspect the vent flashing for gaps or cracks.
- Use roofing cement to seal small gaps.
- If the vent is broken or the flashing is severely damaged, replace the entire vent to ensure proper sealing.
Good ventilation is key for roof longevity—especially during Ottawa winters when attic condensation can become a silent enemy.
Step 8: Perform a Final Inspection
Once you’ve made the necessary repairs, double-check everything:
- Are all shingles securely fastened?
- Is all flashing sealed properly?
- Do you see any leftover gaps or uneven areas?
Then, do a “rain test.” Lightly spray your roof with a hose while someone checks inside the attic for leaks. It’s the easiest way to confirm your work before the next storm hits.
Step 9: Maintain Your Roof Regularly
Roof repair isn’t just about fixing problems—it’s about preventing them in the first place. Here are a few simple maintenance tips to help your roof last longer:
- Clean your gutters at least twice a year to prevent water buildup.
- Trim nearby tree branches to reduce the risk of falling debris.
- Inspect after heavy storms for missing shingles or signs of leaks.
- Schedule a professional inspection every 2–3 years, especially if your roof is over 10 years old.
Companies like JDM Roofing offer regular maintenance checks that catch small issues before they turn into expensive repairs. Think of it like an annual check-up for your home’s most important shield.
Additional Insight: Understanding Roof Lifespan and Materials
The type of roof you have affects how you repair and maintain it.
- Asphalt shingles (the most common in Ottawa) last about 20–25 years with proper care.
- Metal roofing can last 40–70 years but may require specialized repairs.
- Flat roofs (common on modern homes) need regular sealing to prevent pooling water.
Understanding what’s on your roof helps you make smarter maintenance decisions—and prevents unnecessary expenses later on.
Final Thoughts
Repairing a damaged roof may sound intimidating, but with the right tools, preparation, and knowledge, minor issues can be fixed safely. However, when in doubt—or if the damage is extensive—it’s best to let professionals handle it.
JDM Roofing understands the unique challenges Ottawa homeowners face, from harsh winters to heavy summer rains. Their team provides dependable, affordable roofing repair services that help protect your home for years to come.
So whether you’re patching a few shingles or dealing with a major leak, remember: a strong roof means a secure home—and JDM Roofing is just one call away.
FAQs About Roof Repair
1. Can I repair a roof myself?
Yes, minor issues like replacing a few shingles or sealing small leaks can often be DIYed. But for large or structural damage, hire a professional roofer.
2. What’s the best time to repair a roof?
Dry, mild weather—usually spring or early fall—is ideal for roof work. Avoid rainy or icy conditions for safety reasons.
3. How much does roof repair cost in Ottawa?
Minor repairs can cost $200–$500, while major repairs or replacements may range from $1,000 to $5,000 depending on materials and damage.
4. How do I know if my roof needs replacement instead of repair?
If your roof is over 20 years old, leaking in multiple areas, or has widespread shingle loss, it may be time for a full replacement.
5. How long do roof repairs last?
A quality repair done with the right materials can last 10–15 years, depending on your roof’s overall condition and maintenance.
6. How often should I check my roof for damage?
Inspect it at least twice a year—especially after winter and summer storms.
7. Does JDM Roofing offer free estimates?
Yes, JDM Roofing provides free estimates for roof inspections and repair work across Ottawa. Call (613) 882-7663 to schedule yours.

When to Call the Pros at JDM Roofing
While small fixes are manageable, there are times when you need professional expertise. Call JDM Roofing in Ottawa if:
- Your roof has extensive or structural damage.
- You notice persistent leaks or sagging.
- The roof is over 15–20 years old.
- You’re uncomfortable with heights or roof work.
In these cases, JDM Roofing can inspect the damage, provide a detailed quote, and make professional repairs using durable materials that can withstand Ottawa’s weather extremes.
📞 Contact JDM Roofing: (613) 882-7663
🌐 Service Area: Ottawa and surrounding communities
With years of local experience, JDM Roofing has built a solid reputation for honest advice, top-quality craftsmanship, and friendly service. Whether you need emergency repairs or a full roof replacement, their team ensures your home stays dry, safe, and comfortable all year long.
