7 Signs You Need a New Roof (Toronto Homeowner's Checklist)

When Repair Isn't Enough

Every roof has a finite lifespan, and Toronto's harsh climate can accelerate wear. The question most homeowners face is whether to repair or replace. Here are seven signs that point toward replacement.

1. Your Roof Is 20+ Years Old

Standard 3-tab asphalt shingles typically last 15-20 years in Toronto. Architectural shingles can last 25-30 years. If your roof is approaching or exceeding these ages, it's time for a professional inspection even if it looks fine from the ground. Many problems aren't visible without a close-up examination.

2. Shingles Are Curling, Cracking, or Missing

Curling shingles — whether cupping (edges turning up) or clawing (middle rising) — indicate weathering and age. Missing shingles after storms are a clear sign the adhesive seal has failed. A few missing shingles can be repaired, but widespread curling or loss means replacement.

3. Granules in Your Gutters

Those tiny coloured granules on asphalt shingles protect them from UV rays. When shingles age, they shed granules — you'll find them in your gutters and at the bottom of downspouts. Heavy granule loss means your shingles are nearing end-of-life and losing their protective capability.

4. Daylight Through the Roof Deck

Go into your attic on a sunny day. If you can see daylight through the roof boards, water can get in too. This is a serious issue that typically requires immediate attention and often a full replacement.

5. Sagging or Dipping Roof Line

A sagging roof line — visible from the street — indicates structural issues. This could mean the roof deck is deteriorating, there's excessive weight from multiple shingle layers, or there are underlying support problems. This requires urgent professional assessment.

6. Rising Energy Bills

If your heating or cooling costs are climbing without an obvious explanation, your roof may be the culprit. Poor insulation, inadequate ventilation, or a compromised roof membrane can significantly impact energy efficiency. A new roof with proper insulation can reduce energy costs by 10-25%.

7. Moss, Mould, or Moisture in the Attic

Green moss or dark streaks on your roof indicate moisture retention. While surface moss can be cleaned, it often signals underlying moisture problems. Inside, check your attic for mould, wet insulation, or water stains on the underside of the roof deck — all signs of a failing roof system.