4.9 rating · 98 Google reviews
Roof repair, replacement & ventilation in Orillia
A & G Roofing serves Orillia, Simcoe County & Muskoka. Send a few details or call and our office follows up to book your assessment.

4.9 from 98 Google reviews
Consistent five-star feedback from local homeowners across Simcoe County and Muskoka.
CertainTeed 5-Star Select ShingleMaster
The only 5-Star CertainTeed SELECT ShingleMaster™ in the area — verifiable through CertainTeed’s Find a Pro directory.
Fully insured & WSIB covered
Our crews are WSIB covered, including working-at-heights certification, for safe, professional work on every job.
Local since 1967
Based in Severn, protecting homes, cottages and businesses across Orillia, Simcoe County and Muskoka for almost 60 years.
What We Do
Roofing Services in Orillia and Simcoe County
A & G Roofing repairs, replaces, maintains, inspects and ventilates residential roofs. Pick what you need and we follow up.

Roof Repairs
Leaks, storm damage and worn or missing shingles put right.
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Roof Installation & Replacement
Full tear-off and re-roof when a roof has reached the end of its life.
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Roof Maintenance
Preventative maintenance programs that extend the life of your roof.
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Roof Inspections
Structural, material and ventilation checks before small issues get costly.
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Roof Ventilation
Attic and roof ventilation to move air the way your roof needs.
View ventilationRecent Work
Recent A & G Roofs
A look at completed roofing projects across Orillia, Simcoe County and Muskoka.
What Orillia Homeowners Say
Trusted by Homeowners Across Orillia, Simcoe County & Muskoka
“From the quote to the installation, A&G Roofing was outstanding. They even helped me out with my deck design that was to be put on top of the new flat roof. To say I am happy with their service, and workmanship is not enough. If you need to have your roof done, please look no further, they will do an outstanding job.”
— Doug Ronson
“From my first phone call where I reached Violet, to Josh for the quote, then Glenn and his team on site doing the work, I was really impressed with the care and attention to detail everyone took. The team arrived as scheduled, worked quickly and efficiently, noted and fixed problems with the adjacent siding, and cleaned up the site beautifully.”
— Karen Burwell
“We had three roofs done. Very professional. Showed up when they said they would. Explained everything as they worked. Cleaned up everything. When finished you wouldn’t have known they were here. The roofs look great. We are very pleased with the workmanship.”
— Harry Alkema
“I am not in the habit of writing reviews but feel I need to after my experience with A&G Roofing. I owned a large high end roofing company based in Toronto for 35 years before it was sold, so I should know a thing or two about roofing! I chose A&G partly based on reviews, but also on the instant knowledge and credibility Josh and Adam portrayed.”
— Nick Mather
“Promptly on time, right on target with the estimate. Excellent workmanship and attention to detail. Site was cleaned up better than original. Thank you.”
— Stephen Grimes
“A big thank you to Adam and his team from A&G Roofing for coming out to repair the holes in our garage roof caused by the ice storm and replacing the shingles on our roof. They did an amazing job—professional, efficient, and high-quality work all around. We’re so grateful for their help and highly recommend them!”
— Manuela Kerr
Roofing Materials
Compare Roofing Materials
Asphalt shingles, standing seam steel, composite shake and slate, low slope membrane, and cedar — see what fits your home and budget.
View Materials GuideCommon Questions
Roofing FAQs
With almost 60 years of local experience, we’ve built our reputation on quality and transparency. As a CertainTeed 5-Star Select ShingleMaster, our team has undergone the highest level of factory training available — knowledge we apply to every system we install, from Standing Seam Metal to Euroshield Composite and traditional shingles.
Request Information
Request Your Free Estimate
Send your details and our office follows up to book an assessment. Prefer to talk? Call or text us.
- Your property address or postal code
- What the roof needs — repair, replacement, maintenance, inspection or ventilation
- Your timing, and photos if you have them
