We are proud to serve major market & industry verticals


We routinely handle complex projects of any size and scope. Through continuous training and reinvestment in the latest equipment, our capabilities continue to increase and Cornell continues to be a dependable and trusted partner.


Whether it’s new construction, re-roofing or specialized projects, we deliver on time and on budget. The responsibility that comes with ensuring our work will stand up to the elements and provide a lasting solution in critical situations is a Cornell hallmark.


Our expanded capabilities allowed us to install a high quality, new tile roof on Swinney Recreation Center on the campus of the University of Missouri-Kansas City. Cornell works with many area school districts as well, helping keep the elements out and the schools and universities functioning.


We are approved and certified as a supplier to city, state and government institutions. With nearly 100 years of experience, we stand behind the integrity that comes with every Cornell project.



This map identifies all major projects completed from 2007. That’s when Mary McNamara purchased Cornell Roofing & Sheet Metal. It is through 2019. You can use the + & - buttons to move in and see individual projects. Click a project and you’ll see data about it. The colors correspond to the four main areas we work in. Commercial (Green) Healthcare (Blue), Education (Yellow), and Government (Red). As you’ll see as you zoom in, Cornell Does Cover Kansas City!!

About Cornell

Promises Made. Promises Kept.
Our Commercial Roofing and Sheet Metal Expertise Spans Generations

Cornell Roofing and Sheet Metal is founded on the solid bedrock of four key principles:
• Integrity
• Dependability
• Quality
• Responsibility

While our commercial roofing expertise spans nearly 100 years, Cornell continues to expand capabilities, purchase new equipment and always, invest in our most valuable assets – our employees. Our experts can handle projects of any size, scope and complexity.

Cornell is a woman-owned business with WBE and DBE certification from Kansas City, Missouri and WBE certification from the State of Missouri. Mary McNamara, president and owner has nearly 30 years of experience in the industry and has received numerous awards for roofing and sheet metal as well as community and industry involvement.

We steadfastly believe our foundation of values represents our commitment and our promises to our customers.

We call our way “The Cornell Way”. If you choose Cornell, you’ll understand – as our clients do – how our way makes a difference.

As a team, we are committed to certain promises:
• A promise to finish what we start, on time and on budget;
• A promise to pay relentless attention to even the smallest detail;
• A promise to use the very best products;
• A promise to never cut one corner;
• A promise to be the roofing and sheet metal company you can depend on.

  • Integrity.

    Integrity you can trust

  • Dependability.

    You can depend on us

  • Quality.

    You can count on quality

  • Responsibility.

    You can count on responsibility

Client Client Client Client Client Client Client
All logos, brand names and Trademarks are the property of their respective owners. The companies represented are not presented as an endorsement of Cornell Roofing & Sheet Metal Company.


Unmatched Leadership in Roofing & Sheet Metal
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Mary McNamara

Owner and President
Mary has over 15 years of roofing industry experience and joined Cornell in 2006 and bought the company in 2007. In addition, Mary continues to be involved and take leadership roles in industry, business and community organizations.
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Paul Coussens

Senior Vice President, Sheet Metal Project Manager
Paul rejoined Cornell Roofing & Sheet Metal in September 2012. In his prior positions ranging from Apprentice to Vice President he brings the experience of an applicator and that of a senior manager.
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Lenny Austin

Vice President, Roofing Project Manager
Lenny comes to Cornell Roofing & Sheet Metal with over 20 years of experience in the technical services department of Derbigum. Lenny has inspected completed roofing projects throughout the country.

View Management Team


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