Metal vs Asphalt Roofing: 10 Reasons Metal Wins in Ontario
Ontario contractors push asphalt because it's easier to install and generates replacement revenue every 15 years. Here's the honest comparison that the asphalt industry doesn't want you to read.
Most roofing contractors in Ontario install asphalt shingles. Not because asphalt is the best material for Ontario's climate — it isn't — but because it's faster to install, requires less skill, and keeps homeowners coming back for a replacement every 15 years. VAH Construction installs only metal. Here's the honest comparison.
1. Lifespan: 50–70 Years vs 12–18 Years
This is the foundational difference. A standing seam metal roof installed today will likely still be performing when your grandchildren are adults. An asphalt roof installed today will require full replacement in 12–18 years — sooner in exposed Niagara Region and Hamilton properties. Over a 60-year home ownership period, asphalt costs 3–4x more than metal when replacement cycles are accounted for.
2. Performance in Ontario's Climate
Asphalt was designed for moderate climates. Ontario is not moderate. Metal roofing handles freeze-thaw cycling, heavy snow loads, lake-effect precipitation, and severe hail without degradation. Asphalt is actively destroyed by each of these conditions over time.
3. Ice Dam Immunity
Ice dams — the #1 winter roof damage mechanism in Ontario — cannot form on standing seam metal. The smooth surface sheds snow and melt before dam conditions develop. Asphalt roofs are inherently vulnerable to ice damming regardless of underlayment quality.
4. Wind Resistance: 250 km/h vs 130 km/h
Standing seam metal systems are rated for sustained winds exceeding 250 km/h. Premium asphalt shingles are rated for approximately 130 km/h — and frequently fail in real-world conditions below this rating as they age and the adhesive bond weakens.
5. Hail Resistance: Class 4 vs Class 3 at Best
Metal roofing carries a Class 4 UL 2218 impact rating. Even premium architectural asphalt shingles typically achieve Class 3 at best, and this rating applies only to new material — aging asphalt loses impact resistance rapidly.
6. Warranty Quality: Non-Prorated 50-Year vs Prorated 25-Year
Metal roofing warranties are non-prorated — full coverage for the entire term. Asphalt warranties are prorated — your 25-year warranty may only cover 20% of replacement cost in year 20. Read the fine print on any asphalt warranty before comparing numbers.
7. Energy Efficiency
Cool-roof PVDF-coated metal panels reduce attic temperatures by 20–30°C compared to dark asphalt, delivering 10–25% reductions in cooling costs during Ontario summers. Asphalt absorbs solar heat and re-radiates it into the attic space.
8. Fire Resistance: Class A vs Class C
Metal roofing carries a Class A fire resistance rating — the highest available. Asphalt shingles typically carry Class C. In wildfire-interface areas of Ontario, metal roofing may be required or incentivized by insurance.
9. Maintenance: Near-Zero vs Ongoing
Metal roofing requires an annual visual inspection and valley clearing. No recoating, no granule replacement, no periodic repairs. Asphalt requires active management — moss treatment, periodic caulking, shingle replacement after every major wind or hail event.
10. Resale Value and Transferability
A 50-year non-prorated, transferable metal roof warranty is a genuine selling point for Ontario real estate. A real estate buyer who calculates that they won't need to replace the roof for 40 years is a more motivated buyer than one who inherits a 10-year-old asphalt roof with 5 years left. VAH Construction's warranty transfers fully to new owners.
Frequently Asked Questions
Can I switch from asphalt to metal roofing on my Ontario home?
Yes. VAH Construction performs full roof replacement — complete tear-off of existing asphalt, deck inspection and repair, and new standing seam metal installation.
Do I need to replace my asphalt roof with metal, or can it be installed over top?
VAH Construction recommends full tear-off in most cases to inspect the deck, ensure proper ventilation, and install a correct thermal break underlayment. Roofing over existing material can trap moisture and void manufacturer warranties.
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