5-Star Commercial Roofing In Pennsylvania

Your Local Commercial Roofing Experts

#1 PA Roofing Contractors Since 1967
One-Stop Shop for all Commercial Roofing Needs
Fast Communication Response Time

Here at G. Cannon Roofing & Siding, our commercial roofing systems are supported by industry-leading warranties, the highest quality of roofing materials and coatings, and years of dedicated experience.

When you choose G. Cannon, you’re partnering with a trusted Pennsylvania roofing company known for superior service and exceptional results. Ready to tackle commercial roof repairs, install a brand new roof, or replace your commercial gutter system? Reach out to the pros today!

Get In Touch With Us!

Trusted by the best

Kevin is an excellent roof inspector, very honest.

Jeannette Shrift

A person with short gray hair and red lipstick smiles while sitting in a car. There is a partially visible orange star badge in the lower right corner of the image. Trees and parked cars are visible outside the window.

“If you want a perfectly done roof with a long warranty at a low price use these guys. These guys are the best.”

Malcolm Collins

A person stands in a snowy landscape, smiling, wearing a black jacket. They are carrying a child on their back in a blue coat and also holding a Corgi dog. The scene is bright with snow-covered trees in the background.

“Great job on our roof! Thank you guys. Experience from start to finish was top notch.”

Concetta Gibbs

Two people relaxing with their feet over a rocky cliff edge, wearing casual shoes. A vast ocean and rugged cliffs are visible in the background. One person wears white shoes, the other blue. An orange star symbol is overlaid in the corner.

“Seamless experience from start to finish. Excellent work and great customer service. Our roof looks better than expected! Will absolutely recommend to anyone.“

Justin Spoont

A golden retriever looks attentively to the side, with a blurred snowy background. The dog wears a plaid collar, and there is an overlaid orange star symbol at the bottom of the image.

“We had a fantastic experience with them. The job and subsequent follow up was handled to our perfect satisfaction. “

Simone Collins

Smiling person with short hair and black glasses, viewed in a circular frame, with an orange star badge in the corner.

Our Promise to You Is Our Best Work Every Time

At G.Cannon, we truly care about our customers. As home and business owners ourselves, we are proud to offer high-quality services and support throughout your next project. With decades of experience, you can count on our certified roofing contractors to deliver on results no matter the scale of your project. Whether you’re looking for a TPO commercial roofing system, a new shingle roof, or precise metal roofing installation for your home or business – we’ve got you covered.

Aerial view of TPO roof system install on pennsylvania commercial building

Commercial Roofing, Siding, Gutters, & More

Rely on the Top Commercial Roof Installers

With a legacy of excellence since 1967, our certified team of roofing contractors are proud to offer decades of expertise to support the longevity of your business. Don’t settle for lackluster roofing materials, shoddy roof installations, or less-than-average Pennsylvania roofing companies. When you’re dealing with roof damages – you want the best.

Our experienced team specializes in a variety of roofing systems, including flat roofing options (EPDM, TPO, & PVC), standing seam metal, asphalt shingles, cedar shake, and slate tile. We also offer advanced flat roof coatings (silicone & acrylic) and comprehensive roof maintenance plans to ensure long-term durability.

Trust us to be your reliable commercial roofing partner, dedicated to providing top-notch service and support for the long haul.

Partner With Us

Our process

Step 1

A person in a red plaid shirt sits using a smartphone in one hand and typing on a laptop with the other. The scene is lit softly, suggesting a casual and focused atmosphere.

Contact Us

Whether via email or telephone, our friendly representative is here to take your call and schedule your free estimate.

Step 2

Two people sit at a wooden table, discussing documents and charts. A yellow construction helmet and tablet are visible in the background, suggesting a meeting related to a construction or engineering project. Sunlight filters through a window.

Free Estimate

Our skilled estimators will inspect your property and provide a clear and detailed estimate for the required services.

Step 3

A man and woman are having a discussion in an office setting. Both are casually dressed, with the woman holding a clipboard and the man holding a tablet. They are surrounded by papers and appear to be engaged in a collaborative conversation.

Submittals & Site Meeting

While the scope of work might change with each job, our commercial project managers will work with you to best understand the necessary materials, scope of work, and logistics for your commercial project.

Step 4

A man wearing a blue work shirt is sitting at a desk, smiling while talking on a phone. He holds a pen and seems to be working on documents. A computer and office supplies are on the desk, with shelves and a window in the background.

Schedule Job

Our representative will communicate with you and you will be added to our work schedule at the earliest availability.

Step 5

A construction site with workers on a roof installing shingles using a lift. Several windows are visible, and green sheathing covers the building. Stacks of yellow and white building materials are in the foreground.

Perform Work

A G.Cannon representative will be available to meet with you at the beginning of the project. A qualified G.Cannon crew will perform the designated work on the scheduled date.