Milwaukee, Wisconsin – Commercial Roofing Contractor – F.J.A. Christiansen Roofing Co., Inc.


Monday8:00 AM - 5:00 PM
Tuesday8:00 AM - 5:00 PM
Wednesday8:00 AM - 5:00 PM
Thursday8:00 AM - 5:00 PM
Friday8:00 AM - 4:00 PM
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Commercial Roofing Company in Milwaukee, Wisconsin

When Frederic Julius Andreas (F.J.A.) Christiansen founded the commercial roofing company in 1879, he insisted upon the highest standards of workmanship, service, and quality through a “Results, No Excuses” attitude.  This uncompromising commitment has continued to guide our service to customers throughout the 3-century marks in which we have operated.


Our lineage includes three generations of the Christiansen family (F.J.A., son Fred, and grandson Bob) as well as two generations of the McNamara family. Don McNamara, joined Bob Christiansen as a partner in 1967 and subsequently helped lead Tecta America’s formation; and Don’s son, Rob McNamara, served as FJAC President until March 2020. Don Walter became FJAC President in 2020 after serving as Vice President since 2017. Don has been in the roofing industry for over 15 years with previous experience in the construction industry. Rob McNamara continues to work within Tecta’s vendor relations and assists with operations across the country.


Many have come to know us for our clean, green trucks – a symbol of the things we stand for; quality, dependability, integrity, and a deep concern for the needs of our customers and community.  To our customers, our motto of “dependable service since 1879” has come to mean a company that knows how to provide individualized solutions to your roofing problems.


Today, these same traditions are carried through in our new and expanded family in Tecta America Corp.  As a founding member of Tecta America, F.J.A. Christiansen joined a select “best of the best” in the commercial roofing industry across the nation in 2000.  And our continued growth as the commercial roofing industry’s leader allows us to offer the greatest depth of experience, resources, technology, and capabilities available today.



Single-ply roofing Modified bitumen Metal roofing
Coatings Built-up roofing Waterproofing
Roof replacement New construction Repairs & leak services
Preventative maintenance Roof asset management Emergency response
Customer service Historic restoration Skylight/smoke hatch
Snow removal Cool roof Daylighting
Green/vegetative roof


You will not find a higher quality of work anywhere else. Our field staff has hundreds of years of combined experience in the industry. With every project bid, you’ll get a Project Manager, Estimator, Superintendent, Foreman, and Crew. With every project, we provide hand-picked Roofing solutions that are tailored to your project needs, budget, and timeline.


Tecta America Corporation has grown to over 85 locations nationwide and is the largest commercial roofing contractor in the United States and is an approved applicator of  GAFJohns ManvilleCarlisle, Firestone, and all other major manufacturers roofing material.


At Tecta America, we are Roofing Redefined.

Company News

Commercial Roofing Projects

Our Team

tecta america don

Don Walter


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tecta america brian s

brian schaut

Senior Vice President

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tecta america mark

Mark Hamm


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Tecta america chsit west

Chris West

Accounting Manager

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F.J.A. Christiansen Roofing, a Tecta America Company