Top 7 Signs Your Roof Won’t Survive Another Season — And What It’ll Cost You If You Wait
Your roof is your home’s first line of defense — against rain, wind, heat, and snow. But like anything, it has a lifespan, and if it’s starting to show its age, ignoring the warning signs can lead to big, expensive problems.
At B&B Roofing & Exteriors, we’ve seen firsthand how quickly a small issue can snowball into costly damage when it’s left unchecked. If you’re wondering whether your roof is still holding up, here are the top 7 signs it might not survive another season — and what it’ll cost you if you wait too long.
1️⃣ Missing or Damaged Shingles
What to look for:
Curling, cracking, or buckling shingles
Bald spots where granules are missing
Entire shingles blown off by wind
Why it matters:
Shingles protect the underlying layers of your roof from water infiltration. Missing or damaged shingles leave your roof vulnerable to leaks, mold, and rot. And once moisture gets in, it can damage your attic insulation, drywall, and even your home’s structural framing.
The cost of waiting:
A few replaced shingles might cost a couple of hundred dollars. Ignore it, and you could face a full roof replacement or significant interior water damage repairs starting at $5,000-$10,000.
2️⃣ Interior Water Stains or Active Leaks
What to look for:
Brown or yellow stains on ceilings and walls
Water dripping during or after a storm
Peeling paint or bubbling plaster
Why it matters:
Visible stains mean water has already made it past your roofing system. That means insulation is wet, mold is likely forming, and your home’s structure is at risk.
The cost of waiting:
Ignoring leaks can turn minor repairs (around $500-$1,000) into major mold remediation projects and drywall replacements costing upwards of $5,000 or more — not to mention skyrocketing insurance premiums.
3️⃣ Sagging Rooflines
What to look for:
Sections of the roof that look dipped or uneven
Wavy lines along the edge or ridge of your roof
Why it matters:
Sagging indicates structural issues, typically caused by prolonged water exposure or an aging roof deck. If left untreated, this can lead to a partial or full roof collapse — especially under heavy snow or during high winds.
The cost of waiting:
Correcting a sag early might cost $3,000 to $5,000. If it collapses or severely compromises the roof deck, a full replacement combined with structural repairs could run $15,000 or more.
4️⃣ Clogged or Damaged Eavestroughs (Gutters)
What to look for:
Overflowing water during rain
Sagging, detached, or cracked eavestroughs
Water pooling around your foundation
Why it matters:
Your eavestroughs help divert water away from your home. If they’re not working properly, water can back up under your shingles or settle around your foundation, causing leaks both in your roof and basement.
The cost of waiting:
Replacing eavestroughs is relatively affordable, starting around $10-$15 per linear foot. But water damage to your roof deck or foundation? That can soar to $5,000-$20,000 or more.
5️⃣ Excessive Moss or Algae Growth
What to look for:
Green or black streaks on your roof
Patches of moss between shingles
Why it matters:
While moss and algae might seem like a cosmetic issue, they trap moisture against your shingles, accelerating their deterioration. In Ontario’s climate, this can shorten your roof’s lifespan by several years.
The cost of waiting:
Professional cleaning runs a few hundred dollars. Leaving it unchecked could force you into a premature roof replacement, costing $8,000-$15,000 depending on your roof size and material.
6️⃣ Age of Your Roof
What to consider:
Asphalt shingles typically last 15-20 years
GAF Warranty shingles last 50 years
- Metal roofs can last 40+ years
- Previous repairs or layering over old shingles reduce lifespan
Why it matters:
Even if your roof looks okay from the ground, an aging roofing system can fail suddenly under stress — from a heavy snowstorm, high winds, or a heatwave.
The cost of waiting:
A proactive replacement is usually less expensive than an emergency job. Plan it, and you might pay $8,000-$12,000. Wait until after a failure, and with interior damage, disposal, and rush labour rates, it can easily top $20,000.
7️⃣ Rising Energy Bills
What to look for:
Increasing heating or cooling costs
Hot or cold spots in your home
Attic insulation issues
Why it matters:
A failing roof often means poor insulation and ventilation. In summer, your attic overheats, making your AC work harder. In winter, heat escapes through the roof. Either way, you’re paying for it.
The cost of waiting:
Upgrading your roof and insulation can cut energy bills by 10-30%. Waiting means wasted money month after month and extra strain on your HVAC system, which could lead to premature system failure.
Why London, Ontario Homeowners Trust B&B Roofing & Exteriors
When it comes to protecting your biggest investment — your home — you need a roofing contractor you can trust. At B&B Roofing & Exteriors, we’ve built our reputation on reliable service, honest inspections, and quality craftsmanship.
We don’t just slap on a few shingles and call it a day. Our team performs comprehensive inspections, provides clear, upfront estimates, and uses top-grade materials to ensure your roof is built to last in Ontario’s challenging climate.
From roof repairs and full replacements to siding, eavestrough, and exterior renovations — we handle it all.
Don’t Wait Until It’s Too Late — Get Your Free Estimate Today
If your home is showing any of these signs, don’t put it off. Roofing issues never get better on their own, and the cost of waiting is always higher than acting early.
Book your free, no-obligation roofing estimate with B&B Roofing & Exteriors today.
Get a FREE QUOTE or call 519-495-2339 now to schedule. Protect your home, your wallet, and your peace of mind.
Because when it comes to your roof, it’s not about if it’ll fail — it’s about when. And with B&B Roofing & Exteriors, you’ll be ready.
