Roof Replacement in Hamilton, Ontario
GAF Certified quality, honest pricing, and most replacements completed in 1–2 days. Bosani Roofing has protected 5,000+ Hamilton-area homes since 2006.
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Quick answer: A standard asphalt shingle roof replacement in Hamilton, Ontario costs between $7,000 and $18,000 depending on roof size, pitch, and materials. GAF architectural shingles — the most common choice for Hamilton homes — last 30–50 years versus 15–20 years for builder-grade shingles. Most Bosani Roofing residential replacements are completed in 1–2 business days, with the home watertight by end of day one.
Our Work in Hamilton
Three Signs You Need Roof Replacement
🔎 Your shingles are 20+ years old
Ontario's freeze-thaw cycles — averaging 50+ per year in Hamilton — accelerate shingle wear. Most Hamilton roofs need replacement between 20–25 years even without visible damage.
💧 You're seeing granules in the gutters
Heavy granule loss signals the shingles are past mid-life. Within 2–3 years, water infiltration begins at the most exposed areas, typically ridge and eave zones.
🔧 Two or more repairs in five years
Repeated patching on an aging deck costs more than a replacement within 3–4 years. A full replacement now eliminates the repair cycle.
When You Need It
⚡ Multiple leak points
When water appears in more than one ceiling location, the problem is rarely isolated — it's systemic.
⚡ Visible deck rot or sagging
Soft spots visible from outside indicate structural deck damage that patching cannot address.
⚡ Insurance claim after hail or wind
GAF Certified documentation is accepted by Ontario home insurers for damage claims.
⚠️ What Happens If You Wait?
Delaying a failing Hamilton roof costs far more than the replacement itself. Water infiltration into decking adds $2,000–$5,000 in deck replacement. Attic mold remediation in Ontario runs $3,000–$8,000. Every Ontario winter accelerates the damage — freeze-thaw cycles force water deeper into any compromised seal.
6 Steps From Call to Complete
What to expect every time Bosani Roofing shows up at your home.
Free Inspection
We inspect your roof, attic ventilation, decking, and flashing — written report provided same day.
Written Quote
Itemized quote with material specs, timeline, and payment schedule. No verbal estimates ever.
Material Delivery
GAF shingles and underlayment delivered to your property — typically morning of install day.
Complete Tear-Off
Full removal to bare decking. All rotted or damaged boards identified and priced before new material goes down.
GAF Installation
Ice-and-water shield, synthetic underlayment, GAF shingles, and new flashing installed to manufacturer specifications.
Final Inspection & Cleanup
Magnetic nail sweep, full debris removal, walkthrough with you. GAF warranty documentation provided.
"Bosani replaced our entire roof in two days. The crew protected every garden bed, swept for nails each evening, and the GAF warranty documentation was in my email before they left site. This is how roofing is supposed to work."
"Got three quotes — Bosani wasn't cheapest but was the only GAF Certified crew and the only one who showed me the deck inspection results before quoting. Two weeks later, done. No callbacks, no leaks."
Frequently Asked Questions
Honest answers about Roof Replacement in Hamilton, Ontario.