At O’Hara’s Son Roofing (OSR), we’ve built our reputation on delivering reliable, high-quality commercial roofing services with a focus on safety, craftsmanship, and accountability. Today, through our ownership of a small group of affiliated companies, we’ve extended that same standard of service into more regions—allowing us to self-perform work in more places, with the same people-first approach. These companies were thoughtfully chosen not just for their operational capabilities, but for their shared commitment to the same core values that define OSR: integrity, quality, and pride in every job.
You can learn more about each of these companies by visiting their websites below.
Starkweather Roofing Inc. is the top commercial roofing company serving the Southwest region since 1997. Known for quality workmanship and personal attention to detail, they are certified to install all major roofing systems. With a mission rooted in honesty, integrity, safety, and lasting client relationships, they truly live by their tagline: “So you can enjoy the rain.”
Total Systems Roofing, Inc. is a trusted commercial roofing contractor based in Crystal Lake, IL, with over 20 years of experience serving commercial, industrial, and institutional clients. Known for quality workmanship and dependable service, they are recognized for their commitment to excellence and professionalism in the roofing industry.