Have you been looking up at your roof, wondering if those missing shingles or winter leaks signal it’s time for a replacement? If your home’s roof is over 10 years old, or you’ve noticed signs of winter wear and tear, spring is your golden window for a new roof in Ontario—before the summer heat waves hit.
At T. Simpson Roofing, we’ve been serving Barrie, Newmarket, and communities across Ontario for more than 25 years. Over decades of trusted service, we’ve learned that when it comes to roof replacements, timing is everything. Let’s dig into why Ontario homeowners and property managers choose spring for their roofing projects—and why it leads to better results, more peace of mind, and smart savings.
Ontario weather is never boring, and for homeowners, that’s both a point of pride and a challenge when it comes to home maintenance.
Ontario roofs are tested by the full spectrum of Canadian weather:
These extremes cause materials to expand, contract, and age faster than in milder climates. Most asphalt shingle roofs in Ontario last 15-20 years, rather than the 25-30 you’ll see quoted elsewhere.
Winter can be especially harsh on roofing systems. Come spring, keep an eye out for these warning signs:
If you spot any of these, spring is the optimal time for repairs or replacement—before minor issues grow into major headaches.
Spring temperatures—typically between 7°C and 20°C in Ontario—are perfect for roofing projects. Why does this matter? Shingle adhesives and sealants depend on moderate warmth to bond properly. Too cold, and materials won’t seal; too hot, and they can become too soft or even damaged during installation.
A study showed that roofs installed in spring lasted, on average, 10% longer than those replaced in winter for this reason alone.
| Region | March (°C) | April (°C) | May (°C) | Optimal Roofing Temp |
| Barrie | 3-11 | 8-16 | 13-21 | 7-29°C |
| Newmarket | 3-11 | 9-17 | 14-22 | 7-29°C |
| Toronto | 4-12 | 10-18 | 15-23 | 7-29°C |
Ontario’s freeze-thaw cycles wreak havoc on roofing, especially if you’ve already spotted damage. Replacing or repairing your roof right after winter means:
Spring is often a “best-kept secret” for roofing schedules:
According to Angi, March and April are among the top-three most booked months for roof installations. Jump in early and you’ll beat the crowd.
A new roof isn’t just about curb appeal. Replacing your roof in spring means:
Enjoy a more comfortable home—and start reaping benefits before that first July heat wave.
Protecting your home starts at the top. If you’ve noticed winter roof damage, want to get ahead of the summer heat, or simply know your roof is aging out, don’t wait until it’s too late.
At T. Simpson Roofing, we treat your home like it’s our own. With 25+ years of expert craftsmanship, we’re your one-stop home exterior partner—serving Barrie, Newmarket, and surrounding Ontario communities.
Or call our team to secure your spring roofing project window and explore our full range of exterior home solutions!
What is the best month to replace a roof?
Early spring (March–April) offers moderate temperatures and less rain—perfect for shingle adhesion and contractor access.
Is spring or summer better for a roof replacement in Ontario?
Spring wins! Summer heat can damage shingles during installation and cause worker safety issues. Spring strikes the ideal weather balance.
Do roofers work in winter?
Emergency work is possible, but most installations are safer and longer-lasting in spring.
Your home. Our passion. Built on trust. Backed by experience.
