Korellis, US Gypsum roof load, Midwest Helicopter


Being in business since 1960 is only a small part of our overall experience. Korellis has installed millions of square feet of roofing systems. Under difficult conditions, often on projects with structural deck replacements, severe slopes, and poor logistics, work has been completed cost effectively and safely, while at the same time achieving some of the highest honors in the roofing industry.

We have worked at some of the largest steel mills in North America, as well as hundreds of churches, schools, government and office buildings, nuclear power plant and multi-million dollar casinos on Lake Michigan. We’ve completed roofs with a wide variety of shapes, sizes and slopes; used time-tested materials; and established safe environmental procedures during the removal and disposal of asbestos-containing roofing materials (ACRM).

But, Korellis’ real advantage comes from staying on the cutting edge of roofing technology. We keep on top of the new product research and select tested, state-of-the-art materials to add longer life and cost savings to your project.

Mission Statement

The “Korellis Way” goal is to exceed our customers’ expectations through our commitment to safety, performance, workmanship, and consistently outperform our peers in all facets of roofing and related construction services.

The “Korellis Way” requires we respect our associates, provide a secured and safe work environment, and positive working environment workforce. We will provide training and resources for technical and personal skill development. Our associates will be fairly compensated.

The “Korellis Way” treats its vendors with mutual respect. We expect fair and competitive pricing consistent with the highest quality products and services. In return, we will be loyal to our vendors and pay them promptly.

The “Korellis Way” will not allow us to compromise these core values and we realize that by holding these values to the highest standards, we will have the greatest opportunity to retain and maintain loyal customers.

Our Vision: To provide security and peace of mind the “Korellis Way”.


In 1960, George Korellis began a residential roofing business out of his home. Since that time, Pete Korellis, current President and CEO, with the help of many dedicated employees, has grown the business to encompass industrial and commercial sectors, with over 120 employees.

Korellis continues to maintain the company’s original core principles of honesty, integrity and customer satisfaction. By combining industry-leading talent, cutting-edge technology and award winning results, Korellis has earned a reputation as one of the premier roofing contractors in in the Chicagoland area, as well as the honor of being the largest roofing contractor in Northwest Indiana.

Korellis is 100% employee owned through an ESOP. Everyone has a vested common interest in serving customers’ needs and requests. Everyone has the mission to continue to grow the organization.


Korellis is dedicated to being your source for quality workmanship utilizing proven materials. Firestone Building Products Company has honored Korellis with its 2020 Master Contractor Silver and Inner Circle of Quality Awards for Korellis’s commitment to commercial roofing excellence and superior installations. These awards are the commercial roofing industry’s most highly respected accomplishments.

This is the 27th year Korellis has achieved Master Contractor status and the 26th year for the Inner Circle of Quality Award. The Master Contractor designation is bestowed upon roofing professionals for consistent installation excellence and quality craftsmanship based on total square footage and inspection ratings. This award is presented only to those master contractors who have maintained at least two million square feet of Firestone roofs under warranty and achieved an annual Quality Incidence Rating (QIR) of 1.0 or less. The QIR measures the quality performance based on warranty repair incidences per million square feet under warranty.

Every year since 1992, Korellis has been honored by Firestone Building Products Company and now has the distinction of the most Inner Circle of Quality Awards in the Midwest.

On a state and local level, Korellis has received the following accolades:

  • Northwest Indiana Business Roundtable Safety Recognition Awards – Every Year 2012-2020
  • Indiana Half Century Award – 2020
  • Indiana Small Business Development Center – Small Business Person of the Year – 2017
  • National Roofing Contractors Association Gold Circle Award Outstanding Workmanship – 2016
  • Sarnafil Project of the Year – Waterproofing – 3rd Place – 2015