Top commercial roofing contractors in Pennsylvania, ranked by ChatGPT answers

Places ChatGPT showed

• Moser Roofing Solutions · 4.9★ · Roofing contractor
• DDP Roofing Services · Roofing
• Belcher Roofing Corporation · 5.0★ · Roofing contractor
• Manchester Commercial Roofing Systems · 5.0★ · Roofing contractor
• Matrix Roofing · 4.9★ · Roofing contractor

If you're looking for commercial roofing—not residential roofing—Pennsylvania has several strong options. I’d prioritize contractors with deep low-slope/flat-roof experience, manufacturer certifications, sizable commercial crews, and established maintenance programs.

My Pennsylvania shortlist

Contractor	Best for	Coverage / strengths
DBS Roofing (Donald B. Smith)	Large commercial & industrial projects	Central PA; installs 10M+ sq. ft. of low-slope roofing annually
Moser Roofing Solutions	Best overall for service + replacement	Lancaster / South-Central PA and Mid-Atlantic; strong maintenance and emergency service
Belcher Roofing Corp.	Eastern PA / complex commercial work	Montgomeryville; commercial, industrial, sheet metal, waterproofing
CentiMark	Large portfolios / multi-location properties	Nationwide infrastructure with PA operations; repairs, replacement, maintenance
DDP Roofing Services	Large industrial / institutional work	Glen Mills / southeastern PA; broad Mid-Atlantic footprint
Manchester Commercial Roofing Systems	Flat/low-slope systems	Southeastern PA / tri-state; strong Duro-Last specialization
A&A Contracting	Factories & warehouses in Central PA	Long-established industrial/flat-roof specialist
Matrix Roofing	Eastern PA / commercial reroofing	Chalfont; commercial/industrial and Mid-Atlantic service

1\. Moser Roofing Solutions — my best all-around pick

★ 4.9 · Roofing contractor · Closed

[Directions](https://www.google.com/maps/dir/?api=1&destination=Moser%20Roofing%20Solutions%2C1805%20Olde%20Homestead%20Ln%2C%20Lancaster%2C%20PA%2017601%2C%20United%20States) [Website](https://www.moserroofingsolutions.com/?utm_medium=organic&utm_source=chatgpt.com) [Call](tel:+1 717-690-2581)

Moser is particularly attractive if you want a long-term roofing partner rather than just someone to replace the roof. The company has been operating since 2009, focuses heavily on commercial flat and low-slope systems, and offers inspections, repairs, replacement, emergency response and preventative maintenance. It reports serving PA, NJ, MD and DE.

Its maintenance program includes recurring inspections, photographic reporting and priority service, which is valuable for commercial property owners trying to avoid surprise capital expenditures.

Best for: warehouses, manufacturing, retail, office buildings and property portfolios.

2\. DBS Roofing — strongest choice for a large Central PA project

DDP Roofing Services — correction: for DBS, the official company information is the better source here.

DBS Roofing has a particularly impressive commercial scale: it says it installs more than 10 million square feet of low-slope roofing annually and holds major manufacturer/industry credentials including Elevate Platinum Council, Carlisle ESP and GAF Master Select. The company dates back to 1948.

Best for: large warehouses, manufacturing plants, institutional buildings and major reroofing projects.

3\. Belcher Roofing Corporation — excellent Eastern PA option

★ 5.0 · Roofing contractor · Closed

[Directions](https://www.google.com/maps/dir/?api=1&destination=Belcher%20Roofing%20Corporation%2C111%20Commerce%20Dr%2C%20Montgomeryville%2C%20PA%2018936%2C%20United%20States) [Website](https://belcherroofing.com/?utm_source=chatgpt.com) [Call](tel:+1 215-362-5400)

Belcher has been around since 1974 and specializes in commercial roofing, sheet metal and waterproofing. It serves Eastern Pennsylvania plus NJ, DE and MD and is certified to install major single-ply, modified-bitumen and built-up roofing systems.

Best for: complex commercial/industrial buildings where roofing and sheet-metal/waterproofing work overlap.

4\. CentiMark — best for portfolios and multi-site properties is worth getting a bid from if you're managing multiple commercial properties. It has operated since 1968, has more than 100 locations and 650+ commercial roofing crews, and handles evaluation, repairs, maintenance and reroofing.

Best for: national/regional portfolios, large facilities and owners who want standardized service across multiple buildings.

5\. DDP Roofing Services — strong southeastern PA choice

Roofing · Closed

[Directions](https://www.google.com/maps/dir/?api=1&destination=DDP%20Roofing%20Services%2C20%20Conchester%20Rd%2C%20Glen%20Mills%2C%20PA%2019342) [Website](https://www.ddproofing.com?utm_source=chatgpt.com) [Call](tel:+18004284810)

DDP is based in Glen Mills and has been operating since 1989. It focuses on commercial/industrial roofing and has a broad Mid-Atlantic/East Coast service footprint, including Pennsylvania. Its model emphasizes inspections, documentation, preventive maintenance and emergency response.

Best for: commercial property managers who want formal inspection and maintenance programs.

6\. Manchester Commercial Roofing Systems

★ 5.0 · Roofing contractor · Closed

[Directions](https://www.google.com/maps/dir/?api=1&destination=Manchester%20Commercial%20Roofing%20Systems%2C123%20Lakewood%20Dr%2C%20West%20Brandywine%20Township%2C%20PA%2019320%2C%20United%20States) [Website](https://www.manchesterroofingsystems.com/?utm_source=chatgpt.com) [Call](tel:+1 877-220-4590)

Manchester is a good option if you're specifically dealing with a flat or low-slope commercial roof. It's particularly associated with Duro-Last systems and serves the PA/NJ/DE market.

Best for: flat roofs, occupied buildings and projects where minimizing disruption is important.

7\. A&A Contracting

A&A is worth considering for industrial facilities, factories and warehouses, particularly in Central Pennsylvania. The company says it has more than 30 years of commercial/industrial roofing experience and has installed millions of square feet of flat and low-slope roofing.

8\. Matrix Roofing

★ 4.9 · Roofing contractor · Closed

[Directions](https://www.google.com/maps/dir/?api=1&destination=Matrix%20Roofing%2C200%20Highpoint%20Dr%20%23201%2C%20Chalfont%2C%20PA%2018914%2C%20United%20States) [Website](https://matrixroofing.com/?utm_medium=organic&utm_campaign=google_business_profile&utm_source=chatgpt.com) [Call](tel:+1 267-310-2616)

Matrix is another solid Eastern PA candidate for commercial and industrial work, including flat-roof replacement, repairs and restoration. Its service footprint extends beyond Pennsylvania into the broader Mid-Atlantic.

• * *

If I were getting bids

I'd probably solicit 4 proposals, rather than 10:

1. DBS — benchmark for large-scale commercial expertise.
2. Moser — benchmark for service, communication and maintenance.
3. Belcher — Eastern PA commercial/industrial alternative.
4. CentiMark or DDP — depending on whether you have a multi-property portfolio or a single major building.

And I wouldn't choose purely on the lowest bid. For a commercial roof, I'd ask each contractor for:

• Exact proposed roofing system: TPO, PVC, EPDM, modified bitumen, metal, etc.
• Manufacturer and contractor certifications
• Manufacturer warranty vs. contractor workmanship warranty
• Tear-off vs. recover/overlay recommendation
• Moisture scan/infrared inspection if appropriate
• Insulation/deck assessment
• Drainage and ponding-water plan
• Project schedule and business-disruption plan
• Safety program and insurance certificates
• 3–5 comparable commercial references
• Itemized price for maintenance after installation
• Change-order procedure
• Who actually performs the work—employees or subcontractors

One particularly useful benchmark: GAF says its higher-level commercial certifications require contractors to meet specific insurance/licensing requirements and can provide access to stronger system guarantees.

If you tell me the Pennsylvania city/county, building type (warehouse, apartment, office, retail, manufacturing, etc.), approximate roof size, and whether you need repair or full replacement, I can narrow this to the 3–5 best contractors for that specific project and compare their credentials/reviews.

Places ChatGPT showed

• Moser Roofing Solutions · 4.9★ · Roofing contractor
• Ream Roofing Associates · 5.0★ · Roofing contractor
• Belcher Roofing Corporation · 5.0★ · Roofing contractor
• Westmoreland Commercial Roofing · 4.9★ · Roofing contractor
• Equity Commercial Roofing · 5.0★ · Roofing contractor
• Matrix Roofing · 4.9★ · Roofing contractor
• Manchester Commercial Roofing Systems · 5.0★ · Roofing contractor

For warehouses, distribution centers, manufacturing plants, and other large industrial buildings in Pennsylvania, I’d prioritize contractors with proven low-slope/flat-roof experience, large-project capacity, and the ability to work around active operations.

My Pennsylvania shortlist

Contractor	Best fit	Why I’d consider them
Moser Roofing Solutions — Lancaster	Best overall for industrial facilities	Strong specialization in industrial/warehouse roofing, including TPO, PVC, EPDM, BUR and metal. They explicitly address 24/7 manufacturing, phased installation and minimizing operational disruption. Their portfolio includes projects up to 89,000 sq. ft., and they report experience with warehouses and manufacturing facilities.
Ream Roofing Associates — Dallastown	Large warehouses / distribution centers	Long-established commercial contractor with specific experience ranging from smaller commercial additions to very large distribution and warehouse facilities. Good candidate for Central/South-Central PA.
Belcher Roofing Corporation — Montgomeryville	Large commercial/industrial projects in Eastern PA	In business since 1974, with commercial roofing, sheet metal and waterproofing capabilities. They are certified installers of major single-ply, modified-bitumen and built-up systems and are an authorized Butler Builder for metal-building work.
Westmoreland Commercial Roofing — Latrobe	Western PA industrial/warehouse properties	Commercial-focused operation specializing in flat/low-slope and metal roofing, including restoration, replacement and maintenance. Particularly worth considering for Pittsburgh/Latrobe/Johnstown-area facilities.
Equity Commercial Roofing — Mifflinburg	Central PA warehouses & industrial facilities	Commercial-focused rather than residential, with inspection, maintenance, restoration/coatings and replacement capabilities. Structured around documentation and ongoing facility management.
Matrix Roofing — Chalfont	Eastern PA / Philadelphia–Lehigh Valley	Commercial specialist serving the Mid-Atlantic, with experience suited to warehouses and other occupied commercial facilities.
Manchester Commercial Roofing Systems — West Brandywine	SE Pennsylvania	Focuses on flat/low-slope commercial, industrial and institutional buildings and has experience working on active properties, including warehouses.
Meadow Springs Commercial Roofing — Mohnton	Berks/Lancaster/Chester/York region	Smaller commercial specialist that may be a good fit when you want a more hands-on regional contractor rather than a large operation.

The three I'd put at the top of an RFP

1\. Moser Roofing Solutions — probably my first call for a serious industrial facility. Their industrial division specifically addresses manufacturing, warehouses, chemical exposure, equipment vibration and 24/7 operations, and they describe phased/night/weekend work to maintain production.

2\. Belcher Roofing — especially compelling for a large Eastern Pennsylvania warehouse or industrial building where you may need roofing plus sheet-metal/waterproofing capabilities. Its nearly 50-year history and broad commercial system expertise are meaningful differentiators.

3\. Ream Roofing Associates — I'd include them in the bid group when the project is a large distribution/warehouse facility, particularly in south-central Pennsylvania.

One more contractor worth a look

A&A Contracting is particularly interesting if you're in Central Pennsylvania and favor Duro-Last PVC. They report more than 35 years in business, millions of square feet of industrial/commercial roofing, and a strong focus on factories and warehouses.

What I'd require in the RFP

For an industrial warehouse, I wouldn't select solely on price. I'd ask each bidder for:

• 3–5 comparable projects, preferably 100,000+ sq. ft.
• References from facility/operations managers, not just homeowners or GCs.
• Exact proposed system: TPO, PVC, EPDM, modified bitumen, BUR or metal.
• Manufacturer certification and available NDL/material/workmanship warranties.
• Deck/moisture investigation methodology.
• Plan for occupied-building operations, inventory protection and weather shutdowns.
• Safety program, insurance limits and EMR.
• Crew/subcontractor structure—particularly who will actually install the roof.
• Drainage design and ponding-water remediation.
• Detailed schedule and phasing plan.
• 10- and 20-year total-cost-of-ownership comparison where replacement alternatives exist.

One important caveat: “best” depends heavily on where the building is and its roof type. A contractor I'd favor for a 400,000-sq.-ft. distribution center in the Lehigh Valley isn't necessarily the best choice for a 75,000-sq.-ft. manufacturing plant near Pittsburgh.

If you give me the Pennsylvania city/ZIP, approximate warehouse square footage, and whether it's a new roof, replacement, or repair, I can narrow this to 5 contractors that are the strongest matches, including their service area, comparable project experience, reviews, certifications, and contact information.

Places ChatGPT showed

• Moser Roofing Solutions · 4.9★ · Roofing contractor
• L&M Roofing · 4.7★ · Roofing Service
• Manchester Commercial Roofing Systems · 5.0★ · Roofing contractor
• Flat Roof Solutions · 5.0★ · Roofing contractor
• Westmoreland Commercial Roofing · 4.9★ · Roofing contractor
• 768 Roof · 4.1★ · Roofing contractor

If you’re looking for commercial TPO and flat-roof replacement in Pennsylvania, I’d put these contractors on the shortlist. I’m weighting commercial/industrial specialization, TPO experience, manufacturer certifications, replacement capability, geographic coverage, and evidence of actual commercial work rather than just star ratings.

My Pennsylvania shortlist

Contractor	Best fit	Why I’d consider them
Moser Roofing Solutions	Central / Southeastern PA	Strong commercial replacement focus, TPO, EPDM and Duro-Last; serves PA and surrounding states
L&M Roofing	Western PA / Pittsburgh	Commercial flat-roof specialist; TPO/PVC, EPDM and metal; multiple major manufacturer certifications
Membrane Roofing Systems	Western PA / Mercer area	Particularly compelling if TPO is the priority; specializes in TPO/EPDM and is certified by Carlisle, Versico, GAF and Mule-Hide
Manchester Commercial Roofing Systems	Southeastern PA	Commercial/industrial flat and low-slope replacement specialist
Flat Roof Solutions	Philadelphia suburbs / SE PA	Focused specifically on commercial and industrial low-slope roofs, including replacement and recover
Jottan Roofing	Eastern PA	Long-established commercial roofer with TPO, PVC, EPDM and replacement capabilities
Westmoreland Commercial Roofing	Western PA	Commercial-focused replacement, restoration and maintenance
768 Roof	Central/Northern PA	Commercial replacement with emphasis on roof audits, moisture investigation and minimizing operational interruption

1\. Moser Roofing Solutions — one of my top overall picks

Moser is especially interesting for a building owner who wants a full commercial replacement rather than simply a membrane installer. They explicitly handle TPO, EPDM, Duro-Last and commercial replacement, and their TPO work covers warehouses, manufacturing, retail and office buildings. They also describe phased replacement strategies for occupied facilities.

They’re based in Lancaster and advertise service throughout Pennsylvania, Maryland, Delaware and New Jersey.

I'd put them near the top of the bid list for a Central or Southeastern PA project.

2\. L&M Roofing — particularly strong for Western PA

L&M specializes in commercial flat roofing around Pittsburgh, Washington and Erie and specifically installs TPO/PVC, EPDM, metal and built-up systems. They advertise warranties up to 30-year NDL.

Their manufacturer credentials are unusually broad: GAF, Elevate/Firestone, Carlisle and Johns Manville, including TPO-specific credentials.

They also have positive commercial-project feedback, including customers specifically describing work on commercial properties and flat roofs.

For Pittsburgh/Western PA, this would be one of my first calls.

3\. Membrane Roofing Systems — excellent TPO-focused candidate

This one stands out because they're family-owned and specifically focused on commercial/industrial TPO and EPDM, rather than being a primarily residential roofer that happens to offer TPO.

They're based in Sharpsville and serve Western PA and Northeast Ohio. They report certifications with Carlisle, Versico, GAF and Mule-Hide, and specifically show TPO retrofit work.

I'd definitely get a bid from them if the property is in Mercer/Butler/Lawrence/Beaver/Erie-area Western PA.

4\. Jottan Roofing — strong option for Eastern PA

Jottan has been operating since 1974 and specifically serves Eastern Pennsylvania. Their commercial division handles TPO, PVC, EPDM, modified bitumen/BUR and metal, along with inspections, replacement and preventive maintenance.

Their manufacturer affiliations include GAF Commercial, Carlisle, Firestone/Elevate and Johns Manville, among others.

Good choice for larger commercial properties in the Philadelphia/eastern PA market.

5\. Flat Roof Solutions — worth considering around Philadelphia

Flat Roof Solutions is specifically oriented toward commercial/industrial low-slope roofing, with inspection, repair, restoration, recover and full replacement. That specialization is preferable to a general roofer for a large TPO reroof.

I'd particularly consider them if you're in Chester, Montgomery, Delaware, Lancaster or the western Philadelphia suburbs.

What I'd look for in the bids

For a serious commercial TPO replacement, I wouldn't select based on the lowest price. I'd ask every contractor for the same scope:

• 60- or 80-mil TPO rather than automatically accepting 45 mil.
• Exact membrane manufacturer and product.
• Whether the system is fully adhered, mechanically attached or induction welded.
• Insulation type and total R-value.
• Cover-board specification.
• Tear-off down to the deck vs. recover.
• Number and location of roof cores/moisture tests.
• How wet insulation will be identified and removed.
• Drainage/sloping plan for existing ponding areas.
• Perimeter/edge-metal specification.
• Treatment of HVAC curbs, penetrations and rooftop equipment.
• Wind-uplift design/approval.
• Manufacturer inspection requirements.
• No-Dollar-Limit (NDL) manufacturer warranty.
• Contractor workmanship warranty.
• Insurance, bonding capacity and safety record.

That's important because the membrane brand itself isn't the whole decision. Carlisle, GAF, Elevate/Firestone and Johns Manville all have established commercial TPO systems; the exact assembly, attachment, insulation, drainage and installation quality matter enormously. Carlisle, for example, emphasizes that TPO installation details and assembly selection are critical to performance.

GAF likewise distinguishes its higher-level commercial certifications because they determine eligibility for stronger system guarantees.

My ranking by region

• Pittsburgh / Western PA: L&M Roofing, Membrane Roofing Systems
• Lancaster / Harrisburg / Central PA: Moser Roofing Solutions
• Philadelphia / Southeastern PA: Jottan, Flat Roof Solutions, Moser
• Northeastern PA: I'd want to narrow the search further based on the exact county/building
• Large industrial/warehouse project: I'd favor a contractor with several manufacturer certifications and documented large commercial replacements rather than a small general roofer.

If you give me the Pennsylvania city/county, approximate roof size (e.g. 20,000 sq. ft.), and building type (warehouse, apartment, office, retail, manufacturing, etc.), I can narrow this to the best 3–5 contractors for that specific project and compare their certifications, reviews, service area, and commercial project history.

Places ChatGPT showed

• Moser Roofing Solutions · 4.9★ · Roofing contractor
• L&L Roofing Systems · 3.7★ · Roofing contractor
• Great Lakes Commercial Roofing, LLC · 4.5★ · Roofing contractor
• DDP Roofing Services · Roofing
• Double H Commercial Roofing · 5.0★ · Roofing contractor

Yes. I found several Pennsylvania commercial roofing contractors that explicitly advertise 24/7 emergency response for active leaks or commercial roof failures.

Contractor	Pennsylvania coverage	24/7 emergency leak service	Contact
GSM Roofing	PA, including Lancaster/Philadelphia region and much of the state	Yes — 24/7/365, specifically for active leaks, storm damage, wind damage, etc.	800-532-7663
Moser Roofing Solutions	Lancaster / Central & Mid-Atlantic PA	Yes — 24/7/365 emergency commercial roof repair	717-690-2581
Meadow Springs Commercial Roofing	Berks, Lancaster, Chester, York and southeastern PA	Yes — 24/7 emergency calls, including active commercial leaks.	610-806-0712
L&L Roofing Systems	Pittsburgh & Western PA	Yes — 24/7 commercial emergency response for sudden leaks and storm damage.	724-840-3841
Great Lakes Commercial Roofing, LLC	Pittsburgh area	Yes — 24/7, with the company advertising typical emergency response within 2–4 hours	412-256-8050
DDP Roofing Services	Southeastern PA / Mid-Atlantic	Yes — 24/7/365 emergency response	800-428-4810
Double H Commercial Roofing	Central PA	Yes — 24/7 emergency repair, including leaks and storm damage	814-380-8978
Slippery Rock Commercial Roofing Contractors	Western PA / Pittsburgh region	Yes — 24/7, with dedicated repair crews for commercial/industrial roof leaks.	724-924-9606
RTG Solutions	Central PA / statewide PA claims	Yes — 24/7 commercial emergency repair, including active leaks and membrane failures.	570-660-4065
Houck	Harrisburg/Central PA and broader service area	Yes — 24/7/365, with dedicated emergency repair crews.	—

My strongest picks

• GSM Roofing — particularly compelling if you need broad Pennsylvania coverage; it explicitly says its emergency commercial service operates 24/7 every day of the year.
• Meadow Springs — good option for southeastern PA, and specifically advertises that emergency calls are answered 24/7 rather than merely offering an online emergency form.
• L&L Roofing Systems — worth considering for Pittsburgh/Western PA, where it specifically advertises 24/7 commercial emergency leak repair.
• Houck — an established commercial-roofing provider with a dedicated 24-hour emergency program and crews/equipment for after-hours incidents.
• RTG Solutions — particularly relevant to Central Pennsylvania, with explicit 24/7 commercial leak/storm response.

If you tell me the Pennsylvania city or ZIP code of the commercial building, I can narrow this to the 5 closest contractors, including phone numbers, service area, and which ones specifically handle flat/TPO/EPDM/metal roofs.

Places ChatGPT showed

• Ream Roofing Associates · 5.0★ · Roofing contractor
• Moser Roofing Solutions · 4.9★ · Roofing contractor
• New Heights Roofing LLC · 5.0★ · Roofing contractor
• Houck · 4.2★ · Contractor
• M Potteiger Inc · 4.0★ · Roofing contractor
• Robert Ganter Contractors Inc · 4.6★ · Roofing contractor
• Flat Roof Solutions · 5.0★ · Roofing contractor
• Matrix Roofing · 4.9★ · Roofing contractor

If by reliable you mean established commercial focus, strong manufacturer credentials, meaningful experience with large/low-slope roofs, and evidence of sustained customer satisfaction, I’d put these firms near the top of the Eastern Pennsylvania list:

My shortlist

1. Ream Roofing Associates — Dallastown / York area
2. One of the strongest choices for large commercial, industrial, warehouse, distribution, and institutional projects.
3. Family-owned, fourth-generation operation dating to 1895.
4. Particularly compelling if you need a contractor capable of handling a substantial RFP/project rather than a small commercial repair.
5. Moser Roofing Solutions — Lancaster / Central & Eastern PA
6. Strong choice for flat and low-slope commercial roofs, maintenance, restoration, and replacement.
7. Has a particularly strong public review profile—about 4.9/5 from 277 reviews in the current business data.
8. Markets structured preventative-maintenance programs, inspections and reporting, which is a major plus for property owners trying to avoid emergency leaks.
9. New Heights Roofing LLC — Allentown / Lehigh Valley
10. Excellent option for commercial and industrial roofing in the Lehigh Valley and northeastern/eastern PA.
11. Reports 35+ years of experience and works with TPO, EPDM, PVC, modified bitumen and metal systems.
12. GAF lists it as a GoldElite Commercial Contractor, a meaningful credential for qualifying GAF systems and warranties.
13. Current business data shows exceptionally strong customer feedback, although the business-platform review count is relatively small.
14. Houck — Harrisburg / Central PA
15. I'd seriously consider Houck for industrial, institutional and complex commercial facilities.
16. It is more than a roofing company: its building-envelope capabilities include roofing, waterproofing, masonry, concrete rehabilitation, flooring and other commercial work.
17. GAF identifies Houck as a GoldElite Commercial Contractor.
18. M Potteiger Inc — York
19. A particularly interesting choice if your project involves commercial roofing plus sheet metal/metal roofing.
20. Founded in 1969, with a long history serving commercial, industrial and institutional owners in PA and northern Maryland.
21. Robert Ganter Contractors Inc — Quakertown / Bucks County
22. Good candidate for Bucks, Montgomery, Lehigh Valley and surrounding Eastern PA.
23. Commercial roofing and sheet metal are core capabilities, with broader building-envelope expertise.
24. The company lists NRCA and SMACNA memberships, useful indicators for a commercial contractor.
25. Flat Roof Solutions — Malvern / Philadelphia suburbs
26. Worth putting on the bid list for flat/low-slope commercial and industrial roofs, particularly TPO/EPDM and coating/restoration work.
27. The company has operated in the Philadelphia area since 1997 and advertises manufacturer-backed NDL warranties.
28. Matrix Roofing — Chalfont / Southeastern PA
29. A good Southeastern PA choice for commercial flat roofs, emergency repairs, restoration and maintenance.
30. Serves the broader Mid-Atlantic/Tri-State area and has a current 4.9/5 business-platform rating.

One additional company I'd investigate

Condition One Commercial is interesting around the Lehigh Valley. It handles TPO, EPDM, modified bitumen, standing-seam metal and coatings, and has a 4.9/5 rating across 100+ reviews in current business data. Its ability to coordinate both roof work and interior water-damage restoration could be particularly useful for an occupied commercial property.

If I were choosing only 3

For a typical commercial/industrial building in Eastern PA, I'd solicit proposals from:

• Ream Roofing — best fit for large/complex industrial or institutional work.
• Moser Roofing Solutions — excellent for ongoing maintenance + flat/low-slope systems.
• New Heights Roofing — particularly attractive for the Allentown/Lehigh Valley region.

For a Philadelphia/Main Line property, I'd substitute Flat Roof Solutions or Matrix Roofing into that group.

One important distinction: I wouldn't choose a commercial roofer solely because it has a 4.9-star rating. For a roof that could cost hundreds of thousands of dollars, I'd give substantial weight to manufacturer certification, documented comparable projects, in-house crews, safety record, financial stability, warranty terms, and who actually performs warranty repairs. The is also a useful independent industry resource.

If you tell me the city/county, approximate roof size, building type (warehouse, apartment, retail, office, industrial, etc.), and whether it's a replacement or repair, I can narrow this to 5 contractors I'd actually invite to bid, including their relevant certifications, approximate company size/experience, reviews, and red flags.

Places ChatGPT showed

• Burns & Scalo Roofing · 2.3★ · Roofing contractor
• Triangle Roofing Inc · 4.9★ · Roofing contractor
• Phoenix Roofing Co Inc · 4.9★ · Roofing contractor
• Great Lakes Commercial Roofing, LLC · 4.5★ · Roofing contractor
• Cuddy Roofing Company · Roofing
• PITTSBURGH COMMERCIAL ROOFING · 4.7★ · Roofing contractor
• L&M Roofing · 4.7★ · Roofing Service

If you mean commercial/industrial roofing—not primarily residential roofers who also take commercial jobs—Western Pennsylvania has several strong options. Based on current commercial certifications, longevity, project experience, and local reputation, I’d put these near the top:

My shortlist

1. Burns & Scalo Roofing — Pittsburgh
2. Probably my first call for a large, sophisticated commercial project.
3. In business since 1956 and currently a GAF GoldElite Commercial Contractor, with GAF CoatingsPro certification as well.
4. Strong fit for large commercial/industrial buildings, roof replacement, maintenance programs, coatings, metal work and building-envelope projects.
5. Particularly attractive if you want a contractor with the infrastructure to handle a major project rather than a small repair crew.
6. Triangle Roofing Inc — Pittsburgh
7. One of the better commercial/industrial/institutional specialists in the region.
8. GAF Certified Commercial Contractor; works with single-ply and asphaltic systems.
9. Its project experience includes facilities associated with Carnegie Mellon, Duquesne University, Pittsburgh Public Schools, PNC Bank, the U.S. Postal Service and major Pittsburgh cultural institutions.
10. My pick for institutional or technically complicated work.
11. Phoenix Roofing Co Inc — Coraopolis
12. Very interesting choice for large low-slope, industrial and institutional roofs.
13. GAF Certified Commercial Contractor, with single-ply and asphaltic capabilities.
14. Its portfolio includes major facilities such as the Pittsburgh Zoo & Aquarium, Children's Museum, Carnegie Library projects and other very large roof areas.
15. I'd definitely include them in a competitive bid for a sizable project.
16. Great Lakes Commercial Roofing, LLC — Pittsburgh
17. Particularly compelling for flat/low-slope commercial roofs.
18. Handles TPO, EPDM, PVC, modified bitumen, built-up roofing and other commercial systems.
19. Its parent/location listing shows GAF PlatinumElite Commercial Contractor status, which is a notably higher GAF tier than basic certification.
20. Good candidate for commercial properties where membrane roofing and restoration/coatings are central.
21. Cuddy Roofing Company — Pittsburgh
22. Established in 1991 and specifically focused on commercial roofing and sheet metal.
23. Currently a GAF GoldElite Commercial Contractor, with single-ply expertise.
24. A good candidate for commercial/institutional projects where roofing and sheet-metal/building-envelope coordination matter.
25. PITTSBURGH COMMERCIAL ROOFING — Pittsburgh
26. Smaller/local option that has accumulated a strong recent customer-review record.
27. Current business listings show roughly 4.7/5 across 60 reviews, and recent reviews specifically mention large commercial roof replacements, leak work and ongoing commercial maintenance.
28. I would consider them especially for repairs, re-roofing and medium-sized commercial properties where responsiveness and direct owner/contractor communication are important.
29. L&M Roofing — Carnegie
30. Commercial-focused Pittsburgh-area contractor specializing in flat/low-slope work, repairs, coatings and commercial/industrial roofing.
31. Worth considering as a regional alternative, particularly for maintenance/restoration work.

How I'd narrow it down

If your project is...	I'd call
Large industrial/commercial building	Burns & Scalo, Phoenix, Triangle
Hospital, university, institutional facility	Triangle, Phoenix, Burns & Scalo
Large flat/TPO/EPDM/PVC roof	Great Lakes, Burns & Scalo, Phoenix
Roof restoration/coatings	Burns & Scalo, Great Lakes
Commercial roof replacement	Burns & Scalo, Triangle, Phoenix
Medium-sized building / hands-on service	Pittsburgh Commercial Roofing, L&M
Roof + sheet metal/building envelope	Burns & Scalo, Cuddy

One important distinction: manufacturer certification is useful, but it shouldn't be the deciding factor by itself. For example, GAF says its commercial certification program evaluates things such as contractor reputation, responsiveness, inspection ratings and claim history, and higher tiers can provide access to stronger warranty programs.

If this is for an actual building you own/manage, I can make this much more useful: tell me the city/county, approximate roof size (e.g. 20,000 sq. ft.), roof type (TPO/EPDM/metal/etc.), and whether you need repair, replacement, or a maintenance program, and I can rank 3–5 contractors specifically for that project, including which ones I'd invite to bid.

Places ChatGPT showed

• Moser Roofing Solutions · 4.9★ · Roofing contractor
• Equity Commercial Roofing · 5.0★ · Roofing contractor
• Matrix Roofing · 4.9★ · Roofing contractor
• Belcher Roofing Corporation · 5.0★ · Roofing contractor

If you mean commercial/industrial buildings in Pennsylvania, and you care specifically about the strength of the warranty, I’d put these contractors near the top of the list.

My Pennsylvania shortlist

Contractor	Best warranty angle	My take
Moser Roofing Solutions — Lancaster	Duro-Last up to 50-year material warranty; also commercial-system warranties	My #1 for warranty depth, particularly for Duro-Last systems
R.L. Murphey Commercial Roof Systems — PA/Mid-Atlantic	Exceptional Carlisle track record; Centurion Perfect 10 status and 50M+ sq. ft. of Perfect 10 installations	Best evidence of installation quality behind the warranty
Equity Commercial Roofing — Central PA	10–30-year systems; certified with multiple major manufacturers	Strong Central PA option
ProCon Roofing — PA	Full-system material + labor warranties up to 30 years; workmanship warranties up to 20 years	Strong choice for large commercial/industrial work
Matrix Roofing — Southeastern PA	Manufacturer warranties covering labor/materials for 20 years on most reroofing projects	Good option around Philadelphia/Bucks/Chester
Belcher Roofing Corporation — Montgomeryville	Commercial/industrial specialist; worth getting a manufacturer-backed system proposal	Good Philly-area candidate

1\. Moser Roofing Solutions — strongest warranty headline

Moser is particularly interesting because of its long-running relationship with Duro-Last. Moser says it is a Duro-Last Elite Platinum Contractor and offers the Duro-Last 600 system, whose material warranty can reach 50 years.

That doesn't mean everything is covered for 50 years—the distinction between material coverage, workmanship coverage, and a full-system/NDL warranty is critical. But if your objective is maximum stated warranty duration, Moser deserves a serious look.

2\. R.L. Murphey — probably my choice for warranty credibility

R.L. Murphey has an unusually strong commercial roofing résumé. The company reports more than 50 million square feet of Carlisle systems installed in 287 "Perfect 10" installations and has received Carlisle's Centurion recognition. It has also held GAF Master Select status and earned the Master Select President's Club Award.

That's important because I'd rather have a 20–30-year manufacturer NDL warranty installed by a contractor with an exceptional inspection record than a nominally longer warranty from an average installer.

3\. Equity Commercial Roofing — strong Central PA choice

Equity says it installs systems from Versico, Carlisle, Firestone/Elevate, Owens Corning and GAF, with available warranties ranging from 10 to 30 years, depending on system and maintenance.

Its manufacturer certifications are particularly relevant because a high-end warranty generally depends on using an approved system and certified installer.

4\. ProCon Roofing — good 30-year full-system option

ProCon advertises full-system material-and-labor warranties up to 30 years, while its own workmanship warranties go up to 20 years. It specifically mentions Firestone/Elevate's Red Shield system warranties reaching 30 years.

What I'd insist on in the bid

Don't let a contractor win simply because it says "30-year warranty." There are enormous differences between these:

Contractor	Best warranty angle	My take
Moser Roofing Solutions — Lancaster	Duro-Last up to 50-year material warranty; also commercial-system warranties	My #1 for warranty depth, particularly for Duro-Last systems
R.L. Murphey Commercial Roof Systems — PA/Mid-Atlantic	Exceptional Carlisle track record; Centurion Perfect 10 status and 50M+ sq. ft. of Perfect 10 installations	Best evidence of installation quality behind the warranty
Equity Commercial Roofing — Central PA	10–30-year systems; certified with multiple major manufacturers	Strong Central PA option
ProCon Roofing — PA	Full-system material + labor warranties up to 30 years; workmanship warranties up to 20 years	Strong choice for large commercial/industrial work
Matrix Roofing — Southeastern PA	Manufacturer warranties covering labor/materials for 20 years on most reroofing projects	Good option around Philadelphia/Bucks/Chester
Belcher Roofing Corporation — Montgomeryville	Commercial/industrial specialist; worth getting a manufacturer-backed system proposal	Good Philly-area candidate

• 30-year material warranty: often covers only manufacturing defects.
• 30-year workmanship warranty: contractor covers installation mistakes, but the contractor itself is ultimately responsible.
• 30-year NDL/full-system warranty: much more valuable—manufacturer can cover labor and materials to repair warranted failures without a dollar cap.
• 50-year material warranty: impressive, but potentially less valuable than a shorter comprehensive NDL warranty.

For example, commercial roofing warranties can cover everything from just the membrane to the entire assembly, including flashings and metal edge components.

I'd ask every bidder this exact question:

> "Give me the manufacturer's actual warranty document, not the contractor's summary. Is it NDL? What components are covered? Who pays labor? What are the wind, hail, ponding-water, maintenance and rooftop-equipment exclusions? Is annual inspection required?"

Johns Manville, for example, emphasizes that its Peak Advantage guarantee involves approved contractors, technical assistance, manufacturer inspection and formal guarantee documentation.

If you tell me the Pennsylvania city/county, building type, and approximate roof size (e.g. 40,000-sq.-ft. warehouse in Allentown), I can narrow this to the 3–5 contractors I'd actually solicit bids from and compare their current warranty programs side-by-side.

Places ChatGPT showed

• GSM Roofing · 4.4★ · Roofing contractor
• Cooper Roofing, Inc. · 2.1★ · Roofing contractor
• American Roofing · 4.0★ · Roofing contractor
• Garrison Roofing · 1.3★ · Roofing contractor
• Jurin Eric Roofing Services · Roofing
• Tri-State Roofing Solutions · 5.0★ · Roofing contractor
• Moser Roofing Solutions · 4.9★ · Roofing contractor
• Equity Commercial Roofing · 5.0★ · Roofing contractor

Yes. I’d focus on contractors where there’s specific evidence of property-manager relationships, not merely a high consumer-review score.

My Pennsylvania shortlist

• GSM Roofing — Ephrata / Central & Eastern PA
• Best overall for larger commercial portfolios.
• Family-owned since 1946, with commercial/specialty roofing as its core business.
• Particularly compelling for property managers: GSM publishes a testimonial from Colleen Corrado, Commercial Property Manager at Emory Hill Real Estate Services, who says GSM services several of their properties and praises its responsiveness and customer portal for leak reporting.
• Also has COSTARS registration and RoofConnect affiliation, useful if you're managing institutional or multi-location properties.
  *
• Cooper Roofing, Inc. — Bucks County / Philadelphia region
• Strong choice for multifamily and commercial portfolios.
• Family-owned and operated since 1986; explicitly serves property owners and managers and offers 24/7 service and preventative maintenance.
• Their published customer references include Kriegman and Smith, which describes Cooper as an invaluable long-term partner and recommends them for both repairs and new installations.
• They specifically handle multifamily, offices, industrial/manufacturing, storage, restaurants and institutional buildings.
  *
• American Roofing Inc. — Central & Western PA
• One of the clearest matches to your question.
• Family-owned and operated, commercial-focused, in business since 1986.
• The company specifically says it has developed “many long-lasting relationships with property managers across Central Pennsylvania.”
• Strong fit for flat/low-slope commercial systems, including EPDM, TPO/PVC, metal and coatings.
  *
• Garrison Roofing — Philadelphia / Southeast PA
• Especially interesting for multifamily/property-management portfolios.
• The Pennsylvania Apartment Association identifies Garrison as a family-owned local contractor and says its niche is handling property managers' portfolios, from single units to thousands of units.
• It also emphasizes adapting to property managers' software and processes—an unusually relevant capability if you're managing a portfolio rather than one building.
• Jurin Roofing Services — Pennsylvania statewide
• Good candidate when roof asset management is more important than simply replacing roofs.
• Jurin says it has served Pennsylvania building owners and property managers for more than 50 years, with an emphasis on inspections, preventative maintenance, documentation and extending roof life rather than automatically recommending replacement.
• I'd put them high on the list for owners with aging portfolios and significant capital-expenditure planning.
• Tri State Roofing Solutions — Pittsburgh / Western PA
• Worth considering for Western PA industrial/commercial properties.
• Locally owned and operated by Pennsylvania native Ben McNees; the business grew out of a two-generation construction family.
• Their stated customer base includes Pittsburgh-area commercial and industrial customers, and they specialize in commercial roofing rather than being primarily a residential roofer.

Two others I'd investigate

• Moser Roofing Solutions — Lancaster-based, commercial-focused, with an emphasis on inspections, maintenance programs, documentation and flat/low-slope roofs. Its business profile is particularly oriented toward commercial owners/managers.
• Equity Commercial Roofing — Central PA commercial specialist with a strong local review profile and explicit experience with multifamily/HOA, healthcare, industrial, retail, hospitality and institutional properties.

If I were a property manager choosing three

I'd start with:

1. GSM Roofing — strongest combination of family ownership, longevity, sophisticated commercial capabilities and documented property-manager references.
2. Cooper Roofing — particularly attractive for multifamily and multi-property work in southeastern PA.
3. American Roofing — excellent candidate for Central/Western PA where a long-standing local relationship with property managers is important.

One caveat: “property managers trust” isn't a standardized industry ranking, so I wouldn't treat this as a definitive ranking. I weighted documented property-manager relationships, family/local ownership, commercial specialization, longevity and maintenance/portfolio capabilities more heavily than raw Google stars.

If you tell me which part of Pennsylvania (Philadelphia, Pittsburgh, Harrisburg, Lehigh Valley, Lancaster, etc.) and roughly how many buildings/square feet you manage, I can narrow this to 5 contractors and compare their reviews, ownership, commercial credentials, service area, emergency response, maintenance programs, and likely fit for a property-management portfolio.