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As one of Guelph’s few GAF Master Elite certified contractors, we are committed to customer satisfaction. We use high quality roofing products to bring your vision to life.


Even the best product will fail if it is installed incorrectly. We ensure everything from removing and disposing of the old roofing material, to installing the new roof is done to a high standard, and will last for years to come.


We understand that a new roof is a significant investment, and your satisfaction is our highest priority. We provide free estimates to all of our customers and our highly skilled team are always available to answer your questions.

About Us

40+ Years of Roofing Experience

Our founder, Bill Green, began his career in the roofing business over 40 years ago. Today, he uses that experience to position Wm. Green Roofing as roofing industry leaders in Guelph and area. Our knowledgeable employees will work hard to make your dreams become reality.

We understand that an investment in your roof is a large commitment and undertaking. By working with us, our team will ensure that you are receiving the highest quality of service, craftsmanship and commitment in order to get the most out of your investment to protect your home or asset.

We have been providing professional roofing services to Guelph and the surrounding areas since 1986. We’re experts in shingle and flat roofing systems for residential, commercial, industrial, and institutional projects. Whatever the job is, you’re in good hands with Wm. Green Roofing.

Our Services

Roof Repairs

Our seasoned repair crews have experience ranging from small to large scale roof repairs.

New Construction Roofing

Our experienced team provides roof estimates to both sloped and flat roofs.

Roof Maintenance

Extend the shelf life of your roof with proper roof maintenance.

Roof Replacement

Time for a new roof? We take care of everything from debris removal to installation of your new roof.

Skylight Installation

We are experienced in installing a wide range of skylights for your sloped or flat roof.

Roof Inspections

Our team has a wealth of experience in inspecting a wide range of roofing systems.


We have a wide range of warranty options available to meet your needs. Contact us today to learn more.

Eavestrough, Fascia & Soffit Installation

We repair and install eavestrough, fascia and soffit to keep your home or business watertight and looking sharp.

GAF Master Elite Certified Contractor

Wm. Green Roofing is a GAF Master Elite certified installer, an accreditation awarded to only 3% of roofing contractors in North America. We are fully insured, WSIB certified and as members of the OIRCA, CRCA, and GVCA, we are committed to maintaining our reputation as a leading roofing contractor in Wellington County. Our expertise and quality craftsmanship are evident in each of our roofing projects.

We take great pride in seeing our client’s homes and businesses reach their full potential. Contact us today for a free estimate. We’re excited to work with you!

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