NATIONWIDE COMMERCIAL ROOFING CONTRACTOR
O’Hara’s Son Roofing (OSR) is a commercial roofing contractor founded in 1987 and based in Chicago. We install, replace, maintain, and repair flat and low-slope roofs for businesses across the continental United States. Our crews put safety first and build roofs that last.
Years in roofing
States served
Sq. ft. installed per year
Emergency leak response
Commercial Roofing Services
Commercial Reroofing
When a roof reaches the end of its life, OSR replaces it with a system matched to your building, climate, and budget. In addition, we plan the work to limit disruption to your operations. As a result, a new roof can also improve energy use and insulation.
New Construction Roofing
OSR installs roof systems on new commercial buildings, working with general contractors from design to final inspection. Common systems include TPO, PVC, EPDM, modified bitumen, and built-up roofing. Done right from the start, your roof needs fewer repairs for decades.
Preventive Maintenance
Regular inspections catch small problems before they turn into leaks. During each visit, our maintenance team clears drains, checks seams and flashing, and makes minor repairs. Over time, planned care helps your roof reach or pass its expected life.
Leak Repair
Leaks can damage inventory, equipment, and insulation fast. That is why our service crews find the source, make the repair, and document what they found. Also, emergency help is available 24 hours a day.
Annual Service Plans
Extend Roof Life With an Annual Service Plan
Most commercial roofs fail early because of small issues that go unnoticed, not because of age. In fact, insurer Chubb advises inspecting commercial roofs twice a year, in spring and fall (Chubb). With an OSR Annual Service Plan, those inspections stay on schedule, with added checks after major storms. Afterward, you get a written report with photos, so you can plan budgets with fewer surprises.
Industries We Serve Across the Continental U.S.
We roof buildings across the continental U.S. where downtime is costly and conditions are demanding. On every job, local crews and project managers run the work. In addition, multi-site owners get one point of contact and the same standards at every location.
Data centers
Roofs that protect critical equipment and support rooftop units
Cold storage and food facilities
Systems designed for temperature control and vapor drive
Retail
Work scheduled around store hours and customers
Industrial and manufacturing
Large roof areas and heavy rooftop equipment
Commercial offices and warehouses
Durable roofs that keep tenants, inventory, and operations dry
Safety
Safety Comes First on Every Roof
Roofing is high-risk work, so we plan for safety before we start. For example, our crews are trained in fall protection and follow OSHA standards (OSHA). Also, OSR is prequalified with ISNetworld and Avetta, which many facility owners require.
Talk to a Commercial Roofing Expert
Tell us about your building, and then we will help you choose the next step. Call (847) 255-3600 or request a quote online. Have a leak now? Request 24/7 emergency service.
24/7 Emergency Response
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