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Welcome to Malcor

Three generations and 100 years later, the Theisen family and Malcor have become two of the most respected names in the roofing industry in Chicago’s western suburbs. Providing quality, professional roofing and repair services, Malcor Roofing of Illinois, Inc. specializes in the application of single-ply, built-up and modified roofing systems for industrial and commercial buildings.

Today, and with over 45 years of industry experience, third generation owner Scott Theisen continues the family born commitment of developing quality relationships with local communities and customers. This history of dedication to customer service and quality have earned Malcor the respect that consistently creates repeat business and life-long customers.

100 years after its inception, Malcor is an acknowledged leader in commercial roofing – proving that customer service excellence, paired with reliability, professionalism, and attention to detail continue to stand the test of time.

Proudly serving the Chicagoland area

- Since 1923 -

Dedicated to continuing the family legacy, Scott Theisen shares...


When my grandfather, Harry, then my dad Robert, were at the helm of Malcor, they each committed to delivering impeccable quality and extraordinary customer service. I maintain that commitment to our customers and Malcor has never veered from those principles. It is the core of who we are as a company and why we are 100 years strong.

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