About A to Z Roofing & Exteriors

We are dedicated to providing the highest degree of professionalism and craftsmanship to ourselves and our customers.

A to Z Roofing & Exteriors

Since 1994, we’ve sought to maintain the highest level of honesty, fairness, and transparency possible. We have developed an unrivaled service approach that combines our team’s many years of experience in the business to give our clients with industry-best service, products, and installation.

We thrive on providing Colorado with quality roofing services that eliminate the stigma of poor business practices throughout the roofing industry. We work to change the label of the traditional roofing contractor to be one of honesty, integrity, and transparency.

Jim Whelan

Jim Whelan


Jim Whelan has been President of A to Z Roofing since 2007. Prior to his position at A to Z Roofing was in sales and management for JEH and Premier Roofing supply. Jim Whelan has sat on the codes commission for the Colorado Roofing Association and has been an active member since 2007.

With over 18 years of experience in the roofing industry, Jim brings a great deal of knowledge to A to Z. Jim has received extensive training in both product knowledge and applications of various types of roofing. His commitment to quality and service has made A to Z Roofing one of the top roofing companies along the Front Range.

Jim Whelan is a graduate of Colorado State University and has called Colorado his home since 1989. Jim resides in Highlands Ranch with his wife of 22 years and their 3 children.

Eric Brown

Eric Brown

Vice President

We welcomed Eric’s vast experience and success in the roofing and home improvement industry to A to Z Roofing in 2016.

Eric has a proven track record of safe and successful completion of more the thirty multi-family restoration projects. With a passion for providing the highest levels of service, communication, and integrity, Eric has become a trusted resource for Property Managers and Homeowners Associations across Colorado.

Eric’s ability to recruit, train and develop Project Managers for A to Z has allowed us to grow the company without compromising our high standards.

An avid golfer and fisherman, Eric lives in Lakewood with his wife Julie and is a volunteer and proud supporter of the Boy Scouts of America, and Wounded Warrior USA.

Eric Brown
Jennifer Florea

Jennifer Florea

Office Manager

Jennifer Florea is the backbone of our company and has been with A to Z since 2008. With over a decade in the construction industry, Jennifer brings Fortune 500 experience to a small, local, and reputable business.  With a strong belief and professional emphasis on customer service, Jennifer helps to ensure that our customers are our first priority.

From the first phone call; connecting you to a knowledgeable Roofing Professional, to registering manufacturer warranties at project completion, Jennifer works to ensure that your renovation project with A to Z is as seamless as possible.  Working hand-in-hand with our Production and Billing Teams, Jennifer acts as a liaison for our customers and our A to Z team.

Jennifer is a Colorado native and enjoys spending time outdoors traveling the state with her husband, daughter and rescue dog, Blu.

Corey Largen

Corey Largen

Production Manager

Corey started his career as a roofer in Washington State and moved to Denver in 2000. He has been an asset to A to Z Roofing since 2007.

Corey has over 30 years of knowledge pertaining to all aspects of the roofing industry. Corey has hands-on experience roofing from residential projects to large commercial restoration.

Corey’s primary role at A to Z Roofing is our Production Manager but brings much more to the table than just production.

In his free time, Corey enjoys outdoor sports. Such as driving his ATV in the sand dunes, traveling around the world, and completing projects at his home.

Corey Largen

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