ChatGPT's shortlist: commercial roofing contractors in Ohio

Places ChatGPT showed

• West Roofing Systems, Inc. · 5.0★ · Roofing contractor
• Cotterman & Company Inc. · 4.9★ · Roofing contractor
• Ohio and Indiana Roofing · 5.0★ · Roofing contractor
• Technique Roofing Systems LLC · 5.0★ · Roofing contractor
• Structúr Industrial & Commercial Roofing & Maintenance · 4.9★ · Roofing contractor
• Cleveland Commercial Roofing · 5.0★ · Roofing contractor
• Paramount Commercial Roofing Systems · 5.0★ · Roofing contractor
• Superior Roof Systems · 5.0★ · Roofing contractor
• Platinum Commercial Roofing · 5.0★ · Roofing contractor

If you mean commercial/industrial roofing rather than residential, Ohio has a large field of contractors. I’d start by getting bids from several established commercial specialists rather than treating any directory ranking as definitive.

Commercial roofing contractors worth considering in Ohio

• West Roofing Systems, Inc. — LaGrange/Cleveland area. Strong commercial and industrial focus, including SPF, restoration, repair, and replacement. It currently has a 5.0/5 rating from 83 reviews in the business listing.
• Cotterman & Company Inc. — Minster, with offices serving broader Ohio markets. Commercial/industrial work includes new construction, reroofing, repairs, and maintenance. 4.9/5 from 27 reviews.
• Ohio and Indiana Roofing — St. Henry. Commercial and industrial reroofing, new construction, restoration/life-extension work, and multiple membrane systems. 5.0/5 from 71 reviews.
• Technique Roofing Systems LLC — Helena/northwest Ohio. Particularly focused on commercial and industrial flat/low-slope roofs, including replacement and installation. 5.0/5 from 60 reviews.
• Structúr Industrial & Commercial Roofing & Maintenance — Cleveland/Garfield Heights. Specializes in commercial/industrial low-slope repair, restoration, replacement, and maintenance. 4.9/5 from 52 reviews.
• Cleveland Commercial Roofing — Cleveland. Established commercial contractor offering roofing, sheet metal, waterproofing, restoration, repairs, and replacement. 5.0/5 from 25 reviews.
• Paramount Commercial Roofing Systems — Wilmington/Cincinnati region. Commercial inspections, leak diagnostics, restoration, coatings and reroofing; its listing identifies it as a GAF GoldElite Commercial Contractor. 5.0/5 from 26 reviews.
• Superior Roof Systems — Howard/Central Ohio. Commercial low-slope systems, TPO/PVC/EPDM, coatings, SPF, metal roofing, repairs and maintenance. 5.0/5 from 44 reviews.
• Platinum Commercial Roofing — Amanda/Central and Southern Ohio. Focuses specifically on commercial repair, restoration, coatings and replacement, including larger flat-roof/warehouse projects. 5.0/5 from 19 reviews.

Ohio's BBB directory currently shows more than 1,100 businesses under its commercial-roofing category, so service area and actual commercial experience matter considerably when narrowing the field.

How I'd narrow the bids

For a commercial building, compare contractors on:

• Roof system: TPO, EPDM, PVC, modified bitumen, BUR, metal, SPF, etc.
• Project size: Make sure they've completed buildings comparable to yours—not just residential or small commercial jobs.
• Manufacturer credentials: Particularly important if you want a manufacturer's extended system warranty.
• Maintenance program: Preventive inspections can matter as much as the installation itself.
• Insurance and safety record: Verify current workers' comp, general liability, and appropriate safety documentation.
• Warranty: Separate the contractor's workmanship warranty from the manufacturer's material/system warranty.
• References: Ask for 3–5 comparable commercial projects completed several years ago, not just recent installations.
• Detailed scope: Make sure bids specify insulation, tear-off, decking repairs, flashing, drains, penetrations, edge metal, disposal, and warranty terms.

If you tell me what part of Ohio (Cleveland, Columbus, Cincinnati, Dayton, Toledo, Akron, etc.) and roughly what type/size of building you have, I can narrow this to 5–7 contractors that actually serve your area, including their commercial specialties, reviews, credentials, and contact/website information.

Places ChatGPT showed

• West Roofing Systems, Inc. · 5.0★ · Roofing contractor
• Cotterman & Company Inc. · 4.9★ · Roofing contractor
• Ohio and Indiana Roofing · 5.0★ · Roofing contractor
• Warren Roofing & Insulating Co. · 4.4★ · Roofing contractor
• DCA Commercial Roofing · 4.8★ · Roofing contractor
• Cleveland Commercial Roofing · 5.0★ · Roofing contractor
• Division 7 Roofing · 3.7★ · Roofing contractor
• Structúr Industrial & Commercial Roofing & Maintenance · 4.9★ · Roofing contractor

If by “best” you mean strongest fit for large warehouses, distribution centers, manufacturing plants, and other industrial facilities, I’d put these Ohio contractors on a serious bid list. I’m not ranking them overall; the right choice depends heavily on location, roof system, building size, and whether you need replacement, restoration, or maintenance.

• West Roofing Systems, Inc. — Northeast Ohio/Cleveland area. Focuses heavily on commercial and industrial roofing and large low-slope facilities, with an emphasis on minimizing disruption to ongoing operations.
• Cotterman & Company Inc. — West/Central/Southwest Ohio. A dedicated commercial/industrial roofer with experience in industrial buildings, cold storage, institutional facilities, reroofs, new construction, repairs, and maintenance.
• Ohio and Indiana Roofing — West-central Ohio. Commercial/industrial specialist offering reroofing, new construction, and roof-life-extension programs, with systems including Duro-Last and FiberTite.
• Warren Roofing & Insulating Co. — Greater Cleveland/Northeast Ohio. Particularly relevant for larger industrial and institutional properties; its stated project types include warehouses and manufacturing plants.
• DCA Commercial Roofing — Northeast Ohio/statewide reach. Commercial/industrial flat-roof specialist with a strong emphasis on PVC/Duro-Last and metal-roof retrofit work.
• Cleveland Commercial Roofing — Cleveland/Northeast Ohio. Established commercial contractor covering TPO, EPDM, PVC, modified bitumen, built-up roofing, sheet metal, waterproofing, and restoration.
• Division 7 Roofing — Central Ohio/Columbus. Commercial and industrial work including TPO, EPDM, PVC, BUR and metal, with inspection/reporting and maintenance capabilities.
• Structúr Industrial & Commercial Roofing & Maintenance — Cleveland area. Concentrates on commercial/industrial low-slope repair, restoration, and replacement.

One particularly relevant Ohio example

For a very large warehouse/industrial project, Globe Iron Roofing has documented a Franklin, Ohio warehouse project involving roughly 117,300 sq. ft. of TPO plus 13,000 sq. ft. of custom standing-seam metal, including tapered insulation, skylights, gutters and on-site metal fabrication. That kind of project experience is especially relevant if your building has a complicated roof envelope rather than a straightforward membrane replacement.

What I'd compare in the bids

For a warehouse, I wouldn't choose based primarily on the lowest square-foot price. Ask each contractor for:

• Comparable-project references — ideally 100,000+ sq. ft. warehouses or manufacturing facilities.
• Proposed TPO/EPDM/PVC/metal assembly, including membrane thickness and insulation R-value.
• Whether they're proposing tear-off, recover, or restoration, and why.
• Manufacturer certification and warranty available for the exact assembly.
• Wind-uplift design/fastener patterns, especially at corners and perimeters.
• How they'll address ponding water, drains, curbs, penetrations and rooftop equipment.
• Their plan for keeping the warehouse operational during construction.
• Safety program, insurance limits, bonding capacity and subcontractor usage.
• References from facilities managers who have used them for large industrial roofs.
• A detailed scope so you're comparing apples-to-apples bids.

For example, Innovative Roofing Systems says it has installed 25M+ sq. ft. and specifically cites 100,000+ sq. ft. warehouses and manufacturing plants among its projects; Command Roofing likewise focuses specifically on commercial/industrial work and serves Dayton, Cincinnati and Columbus.

If you tell me the Ohio city (e.g. Columbus, Cleveland, Cincinnati, Dayton, Toledo, Akron), approximate warehouse square footage, and whether it's a flat/TPO/EPDM/metal roof, I can narrow this to 5–7 contractors that are particularly relevant and compare their industrial experience, certifications, service area, reviews, and contact information.

Places ChatGPT showed

• West Roofing Systems, Inc. · 5.0★ · Roofing contractor
• Technique Roofing Systems LLC · 5.0★ · Roofing contractor
• Cotterman & Company Inc. · 4.9★ · Roofing contractor
• Ohio and Indiana Roofing · 5.0★ · Roofing contractor
• Division 7 Roofing · 3.7★ · Roofing contractor
• Innovative Roofing Systems · 5.0★ · Roofing contractor
• Tarheel Roofing and Construction Inc. · 5.0★ · Roofing contractor

If you’re comparing commercial contractors for TPO and flat-roof replacement in Ohio, I’d focus less on generic “best roofer” lists and more on commercial specialization, TPO experience, manufacturer certifications, warranty eligibility, and experience with full tear-offs/re-roofs.

Based on current information I found, these are worth putting on your bid list:

• West Roofing Systems, Inc. — LaGrange / Cleveland area. Commercial and industrial specialist with a strong focus on flat/low-slope roofing and full replacements. A good candidate for larger or technically demanding projects.
• Technique Roofing Systems LLC — Helena / Toledo-area. Commercial/industrial-focused contractor specializing in flat and low-slope replacement work across Ohio.
• Cotterman & Company Inc. — Minster, with Dayton and Columbus presence. Commercial/industrial roofing, re-roofing, new construction and maintenance, making it particularly relevant for larger facilities.
• Ohio and Indiana Roofing — St. Henry / western Ohio. Commercial and industrial roofing with substantial experience in re-roofing and roof asset management.
• Flat Roof Experts LLC — Jeromesville / Northeast Ohio. Particularly focused on commercial flat and low-slope roofs, including TPO, EPDM and PVC replacement.
• Division 7 Roofing — Central Ohio. Commercial/industrial contractor offering TPO, EPDM, PVC, BUR and modified-bitumen systems.
• Innovative Roofing Systems — Columbus / statewide. Specifically advertises TPO, EPDM and PVC, full replacement, maintenance and commercial/industrial work across Ohio. Its site reports more than 1,000 commercial projects and manufacturer certifications.
• Tarheel Roofing and Construction Inc. — Kent / Northeast Ohio. Commercial flat-roof replacement and TPO/EPDM/PVC work; also reports GAF and Carlisle credentials.
• DCA Commercial Roofing — particularly interesting if you're in Northeast Ohio and are open to Duro-Last as well as Carlisle/GAF systems. DCA says it specializes in flat-roof replacement and has held Duro-Last factory certification since 2012, including Platinum Contractor status.
• FPS Roofing — Canfield / Youngstown area. GAF lists it as a GoldElite Commercial Contractor and a single-ply roofer; GAF says GoldElite contractors can offer its Diamond Pledge NDL guarantee on qualifying systems.

What I'd require in the bids

For a TPO replacement, I'd ask each contractor to provide the same written specification:

1. 60- or 80-mil TPO — don't compare a 45-mil bid against a 60/80-mil bid as though they're equivalent.
2. Exact manufacturer — e.g. GAF, Carlisle/Versico, Elevate, Johns Manville, etc.
3. Insulation R-value and thickness, including whether existing insulation is being retained.
4. Cover-board type and thickness.
5. Mechanically attached vs. fully adhered membrane.
6. Tear-off depth and deck inspection/replacement allowance.
7. Details for curbs, penetrations, drains, parapets and edge metal.
8. Wind-uplift specification/engineering.
9. Manufacturer inspection and NDL warranty, if available.
10. Contractor workmanship warranty.
11. Whether the contractor itself is factory-authorized for the specific TPO system being proposed.

That last point is important. Manufacturer certification isn't just marketing: for example, GAF says its commercial certification program evaluates contractor inspection ratings, claim history, responsiveness and reputation, and higher certification levels provide access to enhanced guarantees on qualifying systems.

I wouldn't choose based on Google rating alone. For a commercial roof that could cost hundreds of thousands of dollars, I'd get 3–4 apples-to-apples proposals and compare the actual roof assembly, warranty, exclusions, crew experience and references.

If you tell me the Ohio city/ZIP, approximate roof square footage, and whether it's a warehouse, office, retail, industrial, etc., I can narrow this to 5 contractors that actually serve your area and compare their TPO credentials, warranties, reviews, and commercial experience.

Places ChatGPT showed

• Cotterman & Company Inc. · 4.9★ · Roofing contractor
• Kalkreuth Roofing & Sheet Metal, Inc. · 4.5★ · Roofing contractor
• Kelley Brothers Roofing, Inc. · 4.3★ · Roofing contractor
• Innovative Roofing Systems · 5.0★ · Roofing contractor
• Worner Roofing Co · 5.0★ · Roofing contractor
• Cleveland Commercial Roofing · 5.0★ · Roofing contractor
• Vodika Roofing and Maintenance, LLC · 4.9★ · Roofing contractor
• Simon Roofing · 4.0★ · Roofing contractor

Yes. I found several Ohio contractors that explicitly advertise 24/7 emergency commercial roof leak repair:

• Cotterman & Company Inc. — Minster/Dayton/Columbus. Commercial and industrial roofing; emergency teams are advertised as on call 24/7/365.
• Kalkreuth Roofing & Sheet Metal, Inc. — Central Ohio/Columbus area. Advertises 24/7 emergency commercial roofing, including commercial roof leak repair, storm damage and temporary stabilization.
• Kelley Brothers Roofing, Inc. — Fairfield/Cincinnati area. Commercial roofing contractor with 24/7 emergency leak repair and an emergency line at (513) 678-7238.
• Innovative Roofing Systems — Columbus/Central Ohio. Advertises 24/7 emergency commercial roof repair, including active-leak response and temporary repairs.
• Worner Roofing Co — Ontario/Mansfield and broader North Central Ohio. Advertises 24/7 commercial leak response, including leak tracing and emergency repairs.
• Cleveland Commercial Roofing — Cleveland. Commercial/industrial low-slope roofing with 24-hour emergency response for leaks and storm damage.
• Vodika Roofing and Maintenance, LLC — Fremont/Northwest Ohio. Commercial/industrial flat-roof specialist advertising 24/7 emergency response for leaks and storm damage.
• Simon Roofing — Hilliard/Columbus and national commercial coverage. Commercial roof repair and emergency leak response with a 24/7 service line.
• Ohio Commercial Roofing — Mantua/Northeast Ohio. Explicitly advertises a 24/7 emergency response line and commercial leak services.
• Sentry Roofing — advertises 24/7 commercial emergency leak repair statewide in Ohio, covering TPO, EPDM, PVC, metal, modified bitumen and BUR systems.
• TAG Roofing & Restoration — Cincinnati, Dayton and Columbus. Advertises 24-hour emergency storm service and 24/7 commercial roofing emergency response.

If you need someone right now

For an active commercial leak, I'd call a contractor that specifically describes after-hours dispatch rather than relying on ordinary business hours. For example, Cotterman, Kalkreuth, Kelley Brothers, Innovative Roofing Systems, and Ohio Commercial Roofing all explicitly advertise 24/7 emergency availability.

If you tell me the Ohio city or ZIP code of the building, I can narrow this to the closest contractors, including their emergency phone numbers and approximate service area.

Places ChatGPT showed

• West Roofing Systems, Inc. · 5.0★ · Roofing contractor
• Cleveland Commercial Roofing · 5.0★ · Roofing contractor
• Structúr Industrial & Commercial Roofing & Maintenance · 4.9★ · Roofing contractor
• Warren Roofing & Insulating Co. · 4.4★ · Roofing contractor
• Carey Roofing Corporation · 5.0★ · Roofing contractor
• Willham Roofing Co., Inc. · 5.0★ · Roofing contractor
• Roberts Roofing · 4.6★ · Roofing contractor
• Atlas Roofing Co Inc · Roofing

If by “reliable” you mean contractors with a substantial commercial/industrial focus, established local presence, and solid customer-review signals, I’d put these Northeast Ohio firms on your initial bid list. I’m not treating this as a definitive ranking—the right choice depends heavily on your roof system, building size, and project type.

Commercial roofing contractors worth contacting

• West Roofing Systems, Inc. — LaGrange. Strong commercial/industrial orientation, particularly low-slope roofs and spray polyurethane foam (SPF). Their project history includes manufacturing, schools, churches, and other large facilities. Good candidate for large industrial or institutional roofs.
• Cleveland Commercial Roofing — Cleveland. Family-owned and operating since 1993, with commercial/industrial low-slope roofing, waterproofing, sheet metal, restoration, and high-rise work. They work with EPDM, TPO, PVC, modified bitumen, and built-up systems. Good all-around commercial option.
• Structúr Industrial & Commercial Roofing & Maintenance — Garfield Heights. Focuses specifically on commercial and industrial roofing, including repair, restoration, replacement, and maintenance. Its current business profile shows a 4.9/5 rating across 52 reviews. Worth considering for maintenance and restoration as well as replacement.
• Warren Roofing & Insulating Co. — Walton Hills. Long-established commercial/industrial contractor serving the Cleveland–Akron area, with experience involving warehouses, manufacturing, healthcare, schools, retail and other institutional properties. A particularly relevant option for larger facilities and ongoing maintenance.
• Carey Roofing Corporation — Cleveland. Fourth-generation, family-owned company dating to 1946, specializing in commercial/industrial flat and low-slope roofing. It also identifies itself as an NRCA member. Worth getting a proposal if longevity and roof-asset management are priorities.
• Willham Roofing Co., Inc. — Strongsville. Fourth-generation family business founded in 1954, with commercial/industrial and union roofing work. Its listed commercial systems include EPDM, TPO, PVC and modified bitumen. A good one to include if union labor or traditional commercial roofing is important to you.
• Roberts Roofing — Willoughby. Commercial/industrial specialist serving Greater Cleveland, with flat-roof replacement, repair, maintenance, inspections and restoration. Especially worth considering for properties on the east side of Cleveland.
• Atlas Roofing Co Inc — Northfield. Focused specifically on commercial and industrial roofing rather than residential work, with coverage throughout much of Northeast Ohio. Interesting option for challenging commercial/industrial projects.

A useful way to narrow it down

For a large commercial building, warehouse, manufacturing facility, apartment complex, school, or office building, I'd get 3–4 competitive proposals rather than choosing solely on online reviews.

Ask each contractor for:

1. Three comparable local projects completed in the last 3–5 years.
2. Their proposed roof assembly and manufacturer (TPO, EPDM, PVC, modified bitumen, SPF, coating, etc.).
3. Whether they're manufacturer-certified for the proposed system.
4. The manufacturer warranty and contractor workmanship warranty, separately.
5. A detailed explanation of deck replacement, insulation, drainage and flashing allowances—these can produce major change orders.
6. A preventive-maintenance plan and expected roof life.
7. Proof of general liability, workers' compensation and commercial auto insurance.
8. References from property owners with roofs of similar size and complexity.

BBB currently shows numerous Northeast Ohio roofing businesses with accreditation, but BBB status alone isn't enough to establish commercial-roofing expertise; for example, its Cleveland listings include contractors specifically categorized for commercial and flat roofing.

If you tell me the city, approximate roof size (e.g. 20,000 sq. ft.), building type, and whether it's TPO/EPDM/metal/etc., I can narrow this to 3–5 contractors that are particularly suited to your project and compare their experience, reviews, warranties, and service area.

Places ChatGPT showed

• Kelley Brothers Roofing, Inc. · 4.3★ · Roofing contractor
• Tecta America Zero Commercial Roofing · 4.8★ · Roofing contractor
• Kerkan Roofing, Inc · 4.3★ · Roofing contractor
• TeamCraft Roofing · 5.0★ · Roofing contractor
• TruCraft Roofing · 4.9★ · Roofing contractor
• Paramount Commercial Roofing Systems · 5.0★ · Roofing contractor

If you're looking for commercial roofing contractors in Southwest Ohio, I’d build the bid list around companies with substantial commercial/industrial experience rather than residential roofers that also happen to offer commercial work.

Here are several worth considering, based on their Southwest Ohio presence, commercial specialization, documented project experience, and available customer information:

• Kelley Brothers Roofing, Inc. — Fairfield/Cincinnati area. A long-established commercial contractor dating to 1984, with documented large projects including hospitals, casinos, distribution facilities and industrial buildings. They handle everything from leak repairs and maintenance to large reroofing projects.
• Tecta America Zero Commercial Roofing — Cincinnati. Commercial-focused contractor backed by the broader Tecta America network. Particularly worth considering for larger commercial/industrial facilities and property-management portfolios.
• Kerkan Roofing, Inc — Cincinnati. Commercial/industrial roofing plus architectural sheet metal, making them a useful option for projects with complicated flashing, metalwork, or custom details.
• TeamCraft Roofing — Milford/Cincinnati area. Commercial and industrial specialist offering repairs, replacement, inspections, emergency response and preventative maintenance. Their technical offerings include thermal imaging and wind-uplift testing.
• TruCraft Roofing — Milford. Commercial-focused local contractor serving Cincinnati and Dayton, with replacement, repairs, maintenance and metal-fabrication capabilities.
• Paramount Commercial Roofing Systems — Wilmington. Particularly relevant if you're east of Cincinnati or around the Wilmington/Lebanon corridor. They focus exclusively on commercial roofing and offer inspection, leak diagnostics, restoration/coatings and reroofing.
• Command Roofing — Dayton/Moraine. A particularly relevant choice for the Dayton side of Southwest Ohio. The company says it has 40 years in commercial and industrial roofing and serves Dayton, Cincinnati and surrounding markets. Its systems include TPO, EPDM, PVC, standing-seam metal, SBS and roof coatings.
• Maxim Roofing — Fairborn/Dayton. Focused on commercial facilities throughout Central and Southwest Ohio, with nearly 30 years of experience according to the company. It specifically markets to schools, manufacturing facilities, municipalities and property managers.
• Cotterman & Company Roofing — Dayton–Cincinnati corridor. Commercial/industrial specialist serving communities throughout the corridor, including Centerville, Kettering, Mason, Springboro, Vandalia and Troy. They handle TPO, PVC, EPDM, coatings, repairs and maintenance programs.
• Molloy Roofing Company — Cincinnati/Blue Ash. An established Cincinnati contractor with more than a century of company history and a commercial division serving offices, industrial facilities, warehouses, schools, healthcare, retail and institutional properties.

How I'd narrow the field

For a large industrial/warehouse roof, I'd specifically get proposals from Kelley Brothers, Tecta America Zero, Command, and Maxim.

For a Cincinnati-area commercial building, I'd look closely at Kelley Brothers, Tecta America Zero, Kerkan, TeamCraft, and Molloy.

For a Dayton-area facility, Command, Maxim, and Cotterman are particularly relevant.

For a smaller commercial building or roof where leak diagnosis/maintenance is the primary issue, TeamCraft or Paramount may be worth including.

One important caveat: I wouldn't call any of these objectively "the best" without knowing the project. A 250,000-square-foot manufacturing facility, a 20,000-square-foot retail building, and a small office building require very different contractor capabilities.

If you tell me the city, approximate square footage, roof type (TPO/EPDM/metal/etc.), and whether you need repair, replacement, or a new roof, I can narrow this to 3–5 contractors that fit the project and compare their credentials, reviews, manufacturer certifications, and typical project capabilities.

Places ChatGPT showed

• Cotterman & Company Inc. · 4.9★ · Roofing contractor
• Ohio and Indiana Roofing · 5.0★ · Roofing contractor
• Technique Roofing Systems LLC · 5.0★ · Roofing contractor
• Cleveland Commercial Roofing · 5.0★ · Roofing contractor
• Paramount Commercial Roofing Systems · 5.0★ · Roofing contractor

If by “best warranties” you mean the strongest combination of manufacturer-backed coverage, no-dollar-limit (NDL) protection, workmanship coverage, and long terms, I’d focus on Ohio contractors that hold high-level manufacturer certifications rather than simply those advertising a long “workmanship warranty.”

A few Ohio contractors stand out from the current information I found:

What I'd actually ask for

For a significant commercial reroof, don't settle for “25-year warranty” in the proposal. Ask each contractor to quote a manufacturer-issued NDL system warranty that includes both materials and workmanship.

For example, GAF's top commercial Diamond Pledge NDL guarantee can provide up to 35 years on qualifying systems, with unlimited-dollar coverage for covered repairs, but the highest level is restricted to appropriately certified contractors and qualifying assemblies.

Carlisle similarly offers commercial system warranties up to 30 years, including NDL options and workmanship/labor coverage, with a manufacturer's inspection of warranted roofs.

The important distinction is:

• Material warranty: primarily protects against defective membrane/material.
• Workmanship warranty: contractor stands behind installation.
• NDL manufacturer system warranty: potentially covers the cost of repairing covered system failures—including labor—with no dollar cap.
• Contractor's own warranty: depends on whether the contractor remains financially healthy and what the contract actually says.

So a contractor advertising a 30-year warranty isn't necessarily giving you better protection than one offering a 20-year NDL warranty.

My shortlist for bidding

For a sizable Ohio commercial project, I'd put Cotterman, Ohio & Indiana Roofing, Technique Roofing, and Cleveland Commercial Roofing on the initial bid list, depending on where the building is located and what roofing system you're considering. Cotterman's manufacturer credentials are particularly well documented publicly.

If you tell me the Ohio city, approximate roof size, and whether it's TPO, EPDM, PVC, metal, or a flat roof, I can narrow this to 3–5 contractors and compare their actual warranty terms, manufacturer certifications, and service areas side-by-side.

Places ChatGPT showed

• Cotterman & Company Inc. · 4.9★ · Roofing contractor
• Cleveland Commercial Roofing · 5.0★ · Roofing contractor
• Carey Roofing Corporation · 5.0★ · Roofing contractor
• MBM Roofing LLC · 4.9★ · Roofing contractor
• Wm. Kramer & Son, Inc. · 4.0★ · Roofing contractor
• TruCraft Roofing · 4.9★ · Roofing contractor
• Platinum Commercial Roofing · 5.0★ · Roofing contractor
• Roof-Point Commercial Roofing LLC · 4.9★ · Roofing contractor

If you mean Ohio-based, family-owned or genuinely local commercial roofers with evidence of repeat commercial/property-management relationships, I’d put these on the shortlist. I’m using “trusted” to mean there is some combination of documented property-manager/customer testimony, longevity, commercial specialization, and current local reputation—not simply a high star rating.

Strong Ohio-local candidates

• Cotterman & Company Inc. — Minster / Dayton / Columbus
• Family-owned commercial/industrial roofer with a substantial Ohio footprint.
• Particularly relevant for property managers: Cotterman publishes a testimonial from a property management company in Bluffton saying they had used the company twice over 10 years, praising communication, pricing, workmanship, and coordination with other parties. It also has a testimonial from a nationwide property-management company operating in Columbus.
• Current business listing shows a 4.9/5 rating from 27 reviews.
• Cleveland Commercial Roofing — Cleveland
• Family-owned and operated, established in 1993.
• Commercial/industrial focus, including low-slope roofing, sheet metal, waterproofing and restoration.
• Particularly worth considering for Northeast Ohio commercial portfolios where occupied buildings and complicated logistics matter.
• Carey Roofing Corporation — Cleveland
• Fourth-generation, family-owned company dating to 1946.
• Commercial/industrial specialist covering TPO, PVC, EPDM, modified bitumen and built-up roofing.
• A particularly interesting option if you're looking for a long-established local company rather than a residential roofer that happens to do commercial work.
• MBM Roofing LLC — Mentor / Northeast Ohio
• Family-owned and operated commercial roofing company.
• Focuses on flat/low-slope roofs, leak repair and restoration/coatings and specifically serves businesses and property managers.
• Current listing shows 4.9/5 from 32 reviews.
• Wm. Kramer & Son, Inc. — Cincinnati / Southwest Ohio
• Family-owned commercial roofing and architectural sheet-metal contractor with roots going back to 1907.
• Its combination of roofing and in-house sheet-metal capability is useful for commercial properties with complicated parapets, coping, flashing and penetrations.
• TruCraft Roofing — Milford / Cincinnati-Dayton
• Local family- and veteran-owned company with a commercial focus.
• Specifically markets to property/facility managers, along with schools, healthcare, industrial and retail properties.
• Current listing shows 4.9/5 from 27 reviews.
• Platinum Commercial Roofing — Central/Southern Ohio
• Commercial specialist concentrating on repair, restoration, coatings and replacement.
• Particularly relevant for managers trying to extend the life of existing flat/low-slope roofs rather than immediately replacing them.
• Current listing shows 5.0/5 from 19 reviews.
• Roof-Point Commercial Roofing LLC — Middlefield / Northeast Ohio
• Commercial-focused local contractor serving much of Northern Ohio.
• Emphasizes leak resolution, restoration and communication with owners/managers.
• Current listing shows 4.9/5 from 36 reviews.

One older Ohio company I'd also investigate

Warren Roofing & Insulating Co. is another notable Northeast Ohio family-owned commercial roofer. A profile of the company described it as family-owned and family-run since 1922, focused on commercial/industrial roofing and sheet metal, with repeat business from building owners, GCs, consultants and architects.

What stands out for a property manager

For a commercial property portfolio, I'd specifically ask each candidate for:

1. Three references from property managers, not homeowners.
2. Examples of multi-building or multi-property portfolios they maintain.
3. Their preventive-maintenance program and inspection/reporting process.
4. Emergency-leak response times and after-hours procedures.
5. Whether repairs are performed by their own crews or subcontractors.
6. Their experience with your actual roof systems—TPO, EPDM, PVC, modified bitumen, BUR, metal, etc.
7. A sample roof inspection report with photographs and prioritized capital recommendations.
8. Manufacturer certifications and warranty terms.
9. Evidence of adequate general liability, workers' compensation and umbrella coverage.
10. How they handle tenant communication and work around occupied buildings.

If I were building a property-manager vendor shortlist, I'd start by getting proposals/references from Cotterman, Cleveland Commercial Roofing, Carey Roofing, MBM, and Wm. Kramer & Son, then compare them on commercial portfolio experience, response/maintenance program, and references rather than simply comparing bid price.

If you tell me which part of Ohio (Cleveland, Columbus, Cincinnati, Dayton, Toledo, Akron/Canton, etc.) and roughly what type/size of portfolio you manage, I can narrow this to 5–7 contractors and dig specifically for property-manager references, maintenance programs, commercial certifications, years in business, and current reviews.