Why Choose OSR?
Industry-Leading Certifications
Trusted Experts
As a nationwide commercial roofing contractor, OSR is committed to quality at every stage of a project. Our certifications and industry accolades reflect years of consistent performance, manufacturer-approved training, and attention to detail on every roof we install or maintain. These distinctions aren’t just recognition, they help us secure full manufacturer warranties and source materials efficiently, so building owners get lasting value from their investment.
Chairman’s Circle
A top 2% national honor recognizing OSR’s elite quality, reliability, and customer satisfaction.
PlatinumElite™
Recognizes OSR for exceptional quality and grants access to GAF’s most comprehensive warranty offerings.
ESP Premier
Earned by the top 20 ESP Authorized Applicators who meet Carlisle’s Perfection Award quality standards.
Perfection Award
A top 5% prestigious honor, reflecting a OSR’s commitment to excellence and our role in shaping the future of roofing industry standards.
President’s Club
Underscores OSR’s dedication to excellence and positions us as leaders in the commercial roofing industry (given to the top 25 contractors).
Peak Advantage Pinnacle Council
JM’s highest distinction, underscoring OSR’s leadership and excellence in the commercial roofing industry.
Peak Advantage 5280 Council
Awarded to the top 15 contractors nationwide who demonstrate exceptional performance, quality, and commitment to excellence.
Alliance Member
Signifies that a OSR has met Sika Sarnafil’s rigorous standards and is committed to delivering high-quality roofing installations.
Nationwide Coverage
O’Hara’s Son Roofing (OSR) is proud to provide nationwide commercial roofing solutions with a consistent focus on quality, safety, and communication. With a single point of contact, we ensure clear and consistent communication throughout every project.
No matter the location or team structure, you’ll always experience the OSR difference: exceptional results, delivered by professionals you can trust.
Ask us about our self-perform model and how it could benefit your next project.
Nationwide Coverage
O’Hara’s Son Roofing (OSR) is proud to provide nationwide commercial roofing solutions with a consistent focus on quality, safety, and communication. With a single point of contact, we ensure clear and consistent communication throughout every project.
No matter the location or team structure, you’ll always experience the OSR difference: exceptional results, delivered by professionals you can trust.
Ask us about our self-perform model and how it could benefit your next project.
Delivering Results: Last Year's Projects
Last Year's Projects
REROOFING PROJECTS
SQ FT OF REROOFING
NEW CONSTRUCTION PROJECTS
SQ FT OF NEW CONSTRUCTION
Safety Culture
With the guidance of our dedicated safety leadership and access to hundreds of qualified safety officers across the nation, safety is not just a priority, it is our commitment. We believe every employee deserves a safe, secure work environment, which is why we place the highest emphasis on safety and OSHA compliance.
Avetta-Verified and ISNetworld Member Contractor
Meeting the highest standards in safety, insurance, and compliance nationwide.
Flat Roof Pros Coast to Coast
We specialize in installing various styles of roof applications and coatings. Our expertise spans a wide range of commercial buildings, including data centers, cold storage facilities, manufacturing plants, warehouses, retail spaces, and other commercial properties. Additionally, we offer extensive roof repairs, maintenance, OSHA-compliant safety items, and renewable energy solutions.
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