What types of services do you offer?

Services we offer include roofing, siding, windows, and gutters.

How do I know whether I need a repair or a new installation?

With your free estimate, our competent technician will give you the right information to make the best decision for your home and your wallet.

How long will my project take from start to finish?

While not all homes are the same, 98% of roofs up to 3,000 sq ft are finished in one day.

Are you licensed and insured?

Yes, we are licensed and fully insured. PA License: #PA039331.

How soon can you start?

Typically, we can start within 2 weeks from when the contract is signed. Some jobs may take longer due to supply availability.

What payment methods do you accept?

Check, cash, credit card (Visa, Discover, Mastercard).

How does G. Cannon communicate with customers?

You can reach us by phone, email, and text. Our office hours are Monday through Friday, 8:30 AM to 4:30 PM EST.

What types of commercial roofing do you offer?

We are a one-stop shop for all commercial roofing needs. Our installers are highly experienced with all kinds of commercial roofing, including TPO, EPDM, and flat roof systems.

King of Prussia Roofing Services

Roof Replacement and Repair in King of Prussia, PA

GAF Master Elite Installers
Competitive roof warranty options
FREE roof inspections

G. Cannon has been the roofing contractor King of Prussia homeowners call when the job has to be done right. From full roof replacements on the colonials along Gulph Road to storm damage repairs near the King of Prussia Mall and Upper Merion Township, we bring the same crew, the same materials, and the same standard to every project. Our recent roof replacement in King of Prussia is a good example of what to expect. GAF Master Elite certified, licensed in Pennsylvania (#PA039331), and insured. Request your free inspection and see why KoP homeowners have trusted us since 1967.

Get In Touch With Us!

LinkedIn
This field is for validation purposes and should be left unchanged.
First Name*
Last Name*
Your Phone Number*
Your Email*
Address
Preferred Contact Method
What Type of Service Do You Need?*
This Project Is For:*
What Type of Work Do You Need?*
Additional Notes or Comments
Opt-In to Messaging
By submitting this form, you consent to receive text communication from G. Cannon Roofing. Message frequency may vary. Standard message and data rates may apply. Reply STOP to opt out. Reply HELP for assistance. Your mobile information will not be sold or shared with third parties for promotional or marketing purposes. Privacy Policy

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.

What King of Prussia Homeowners Say

At G. Cannon Roofing & Siding, it’s our mission to provide the highest-quality of residential and commercial roofing services to all King of Prussia homeowners. As homeowners ourselves, we want to take the stress off of you when it’s time for roof repairs or replacement — not add to it. Take it from our happy customers — there’s a reason G. Cannon is the go-to roofing company in King of Prussia. Rely on us for all of your siding, gutter, and roofing needs!

Roofing Built for Upper Merion Township

King of Prussia sits in Upper Merion Township, where homes range from mid-century ranch houses near Warner Village to newer construction in the developments off Henderson Road. Each neighborhood has its own roofing challenges. Older homes along DeKalb Pike often have multiple roof layers that need a full tear-off before new shingles go down. Homes closer to the Valley Forge National Historical Park deal with heavy tree canopy and moisture retention that accelerates wear on flashing and valleys.

We have completed projects across KoP, including restoration work at Valley Forge Church and residential replacements with skylight installations. Every project starts with a thorough inspection, not a sales pitch. We document the condition of your decking, flashing, ventilation, and shingle condition before recommending any work.

Get free inspection

Close up of shingles installed on residential roof in king of prussia pa

crew installing tyvek house wrap pittsgrove nj

See All Projects

Customers are Treated Like Family

We understand that a new roof is a significant expenditure, and we will work with you every step of the way to ensure that you are completely happy with your new roof. When it comes to concerns, costs, or timelines, you’ll never be left in the dark. We pride ourselves on providing unbeatable customer service with consistent and transparent communication every step of the way.

Licensed, Insured, and GAF Master Elite Certified

G. Cannon holds Pennsylvania contractor license #PA039331 and carries full liability and workers compensation insurance. We are one of a limited number of GAF Master Elite contractors in the Philadelphia metro area, a designation earned through installation volume, training, and customer satisfaction scores. That certification means your roof is eligible for GAF system warranties that cover both materials and labor. For King of Prussia homeowners, that is real protection, not a marketing claim. Learn about our warranty options.

Get in Touch

A charming two-story suburban house features a brick and siding exterior, complemented by a black front door and white garage. With king of Prussia roofing adding durability, the home boasts a cozy front porch with two chairs, a lush lawn, and a wooden fence under a partly cloudy sky.

Our process

Step 1

customer service rep talking to customer

Phone Call

Our friendly representative is here to take your call and schedule your free estimate.

Step 2

Free Estimate

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

Step 3

An elderly couple sits at a wooden table facing a man in a white shirt. The couple is smiling and holding hands, while the man holds a pen and paper. Shelves with books and plants are visible in the background.

Sales Meeting & Follow-Up

Our estimator will explain the service process and material details and then provide you with all the necessary information to make an informed decision.

Step 4

A person is sitting at a table using a laptop while holding a smartphone. They are wearing a denim jacket. Sunlight enters from the left, casting a warm glow over the scene.

Schedule Job

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

Step 5

G Cannon team performs a residential roof replacement.

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.