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Gundaker Construction and Restoration Group

About Gundaker Construction & Restoration Group

Mike Kossman and Patrick Devers


We are a family owned business that is licensed, bonded and insured.

Gundaker, a name serving Chesterfield and the greater metropolitan area of St. Louis since 1968. We offer the highest quality construction services, roof installation, roof repair, restoration, and building services for commercial and residential properties through the Chesterfield valley area.


Premier Chesterfield Roofing Contractor

Professional Contractors

Started by business owners Patrick Devers and Mike Kossman in 2013, Gundaker Construction & Restoration Group is the premier roofing company in the Chesterfield area and is dedicated to provide exceptional customer service to each and every valued homeowner or business. With a combined 50 plus years of roofing experience, you can rest assured that your project will be handled professionally and accurately. No job is too big or too small.

Insurance Specialists

Gundaker Construction featured in West News Magazine

GCRG insurance claim specialists are the best in the business and work with all insurance companies to access storm damage and assure everything gets covered.

Filing insurance claims and dealing with your insurance company can be time consuming. GCRG wants to take care of all the details so you don’t have to. Let Gundaker Construction & Restoration Group get the job right the first time.

Gundaker Construction & Restoration Group is a full service general contracting company and Chesterfield roofer specializing in all types of construction, roofing, restoration, and are St. Louis’ insurance claims specialists.

Our team is Missouri’s roofing and restoration experts; we provide professional evaluations of hail, wind, and storm damage to residential homes, apartment complexes/condo associations, commercial properties, churches, and schools.

"Long-time family work ethics, they actually show up on time and get the job done as estimated. Their materials are warranted, they are licensed and bonded. Gundaker is a known name in our area. Plus, if you work with a known, reliable contractor, you will not have to work with storm chasers. Your ins carrier is prone to awarding the cheapest bid. Realize, we all know cheapest is primarily the most inferior materials and workmanship. I have a long history with this family, they give you the quality you deserve." Read More

– Cheryl Siemer - St. Louis, MO

"It was a great experience working with Gundaker. From the customer service I received from the sales team, to the timely manner of the crew, I was all around impressed. The roof looks great and they still check up on me and help me with maintenance around the house. I would highly recommend them." Read More

– Phyllis S., Chesterfield, MO

"Thank you for your professionalism while handling our roof replacement. It was an easy process with you coordinating the details with our insurance company." Read More

– Ken & Chrissy Pruitt - Fenton, MO

"I put off replacing my roof for some time. I expected it to be a hassle. Working with Gundaker Construction was so easy! Gundaker handled all the details for me. The work crew did a great job and left no mess. Very smooth!" Read More

– Judy Horrell - Valley Park, MO

GAF Certified Professional Installers

We are uniquely trained and certified to install GAF materials, representing only 3% of all roofing contractors licensed in the State of Missouri. With our certification, all homeowners and businesses receive an extended warranty that guarantees a 50 year non-prorated coverage for new roofs made using GAF materials.

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