Reliable Roofing Services in Toronto & the GTA

At A-ONE ROOFING, we provide professional roofing solutions for homeowners across the Greater Toronto Area. Whether you need a small repair or a complete roof replacement, we bring honest service, quality workmanship, and fast turnaround times — every time.

📞 Book your FREE inspection today!

Who We Are

A-ONE ROOFING is a locally owned and operated roofing company proudly serving Toronto and the GTA. We specialize in residential roofing, with a strong focus on quality, reliability, and customer satisfaction.

We understand how important your home is — and a secure, leak-free roof is one of its most essential parts. That’s why we treat every project with care, offering dependable service and long-lasting results.

Free roof inspections and honest advice
Fast emergency response for leaks and storm damage
Transparent pricing with no hidden fees
Fully insured, experienced team
High-quality materials and workmanship

Our Services Include

Professional installation of high-quality asphalt shingles for residential roof in Ajax

Close-up of newly installed architectural roof shingles for durability

🛠️ Roof Repairs & Leak Fixes

We quickly and effectively fix common roof problems including leaks, cracked or missing shingles, flashing damage, and more — helping extend the life of your roof.

Detailed installation of architectural asphalt shingles

Completed residential roofing project by A-ONE ROOFING services

🔧 Roof Replacement & Re-roofing

Complete removal of old roofing materials and professional installation of brand-new roofing systems using durable, weather-resistant products to ensure long-term protection and value.

Durable roof shingle replacement by professional roofers

Close-up of residential roof repair and maintenance

🚨 Emergency Roof Repairs (24/7)

Got an unexpected leak or storm damage? We offer 24/7 emergency response throughout the Greater Toronto Area to secure your property and prevent further damage.

Installation of gutter guards to prevent leaf clogs

Fixing sagging gutters and eavestrough repair services

🌀 Gutter Services: Replacement, Cleaning & Repairs

We provide complete eavestrough services — clearing clogged gutters, sealing leaks, and replacing broken or aging gutter systems to ensure proper drainage and roof protection.

A professional roofer on a ladder installing shingles on a residential roof. A large roofing service truck is parked below.

Chimney flashing repair and roof sealing service

🔥 Chimney Repairs & Restoration

We repair cracked masonry, deteriorated flashing, and damaged chimney structures to restore both safety and function — keeping your home secure from water penetration and heat loss.

Expert flat roof replacement showing workers installing roof membrane

Completed residential flat roof repairs and waterproofing project

🏠 Flat Roof Repairs, Replacement & Waterproofing

Skilled in flat roofing systems for homes, garages, and extensions. We repair leaks, membrane issues, and provide professional waterproofing solutions to protect your property from water damage.

Modern home with new siding installation for improved curb appeal

Siding repair in progress on a house exterior using a ladder

🧱 Siding Installation & Repairs

Boost curb appeal and improve insulation with our siding services. We install and repair vinyl, wood, and composite siding — replacing cracked, faded, or damaged panels with precision and care.