When it comes to residential and commercial roofing in Iowa, Missouri and Illinois, Kosarek Construction Company delivers the craftsmanship, certifications, and accountability that property owners depend on. We serve homeowners, business owners, and commercial property managers across the greater St. Louis metro area, St. Charles County, and Southwest Illinois — including Madison and St. Clair Counties. From residential roof replacements and commercial flat roofing systems to storm damage repair and full insurance claim management, our licensed and GAF-certified crews handle every scope of work with precision and a 100% Satisfaction Guarantee. Select your city below to learn more about our residential and commercial roofing services in your area, or call 1-855-567-2735 to schedule your free roof inspection today.