Modified Bitumen Roofing Systems Pittsburgh, PA
Why Great Lakes Modified Bitumen Performs Better
Engineered for Pittsburgh’s Commercial Footprint
Great Lakes modified bitumen isn’t an off-the-shelf product; it’s a complete commercial roofing system designed for the realities of Pittsburgh buildings. We don’t base specs solely on square footage. Instead, we evaluate usage, access points, rooftop traffic, equipment load, and structural layout.
Flat roofs with regular foot traffic require reinforced pathways and added protection at ladder or hatch entry points. Facilities with rooftop HVAC systems or solar panels need stronger base sheets and carefully applied flashings to prevent wear. Our roofing crews are trained to match installation methods to the site by using cold adhesive, heat-welded seams, or a hybrid technique when needed.
We choose materials that stand up to what the roof will face, not what’s easiest to install. Every modified bitumen system from Great Lakes is built with deliberate sequencing, certified techniques, and a commitment to longevity, engineered specifically for commercial performance.
- Multiple application methods: Cold-applied, torch-down, or self-adhered options tailored to your building and safety requirements
- Heavy-duty cap sheets: Add an extra layer of defense against foot traffic, debris, and thermal movement
- Multi-ply protection: Layers ensure that damage to one doesn’t compromise the entire system
- Seamless flashing: Expertly sealed around curbs, vents, drains, and penetrations to eliminate water entry points
- Tapered insulation: Enhances drainage on flat or low-slope roofs while improving energy performance
- Rooftop-ready design: Built with access paths and reinforcement zones for safe foot traffic and equipment servicing
- Maintenance-friendly layout: Designed with future inspections and repairs in mind, minimizing long-term disruption
- Systemized approach: Every component, from base sheet to top ply, is selected for your site, not convenience
- Pittsburgh-tested performance: Built to handle the wear, load, and layout of commercial facilities across the city
Modified Bitumen Meets Pittsburgh’s Commercial Standards
Pittsburgh facilities are busy environments with specific codes, safety rules, and operational demands. At Great Lakes, our modified bitumen solutions are built for that reality. We design every system to meet code while holding up under daily foot traffic, rooftop equipment use, and ongoing maintenance. Safety is a priority, so we keep job sites OSHA-compliant and minimize disruption to building operations.
We’ve completed projects in some of Pittsburgh’s most complex facilities, including healthcare buildings, transportation hubs, and government garages. Our team works with your facility managers, stays on top of permit timelines, and ensures each layer is installed to spec. With Great Lakes modified bitumen, you get a partner who understands the demands of commercial Pittsburgh.
- Plans built around Pittsburgh’s permit process: We anticipate review timelines and paperwork requirements
- Public-sector experience: Trusted for schools, transit centers, and municipal infrastructure
- Safety-first installations: All job sites meet or exceed OSHA compliance standards. Great Lakes is recognized as a GAF Premium Elite Commercial Contractor, a distinction awarded to top-tier commercial installers across Pennsylvania.
- High-clearance and union-capable teams: Approved for secure, large-scale, and publicly funded projects
- End-to-end project management: From pre-construction meetings to final walk-throughs
- Local relationships: Trusted by Pittsburgh-area developers, facility managers, and general contractors
- Minimal disruption: We schedule and sequence work to reduce interference with daily operations
- Built to last: Systems meet both state requirements and internal specs from demanding institutions
Core Benefits of Great Lakes Modified Bitumen Systems
Great Lakes modified bitumen provides a reliable defense against weathering, foot traffic, and rooftop stressors. It’s flexible, layered, and easily maintained across decades of use.
- Seam-welded protection
- UV-stable surfaces
- Cold and heat-applied methods
- Designed for flat and low-slope systems
Seam-welded protection gives Great Lakes modified bitumen systems their edge in water resistance. Whether torch-applied or cold-adhered, each layer bonds tightly to the next, minimizing weak points and preventing leaks. The UV-stable surface resists cracking, fading, and thermal breakdown, preserving performance and appearance over the years.
Our systems are also solar-ready, offering a solid, low-maintenance platform for rooftop solar panel installation. Custom flashings are fabricated to match every curb, edge, and vent, ensuring a perfect seal across the entire structure. No off-the-shelf parts, just precise, secure protection.
Cold or heat-applied options allow us to match the method to your project’s requirements, schedule, and job site safety conditions. Designed specifically for flat and low-slope structures, modified bitumen creates a watertight, reinforced system that stands up to foot traffic and long-term use. With easy upkeep and strong ROI, it’s a smart, long-lasting solution for Pittsburgh’s commercial facilities.
Quality Commercial Roofing
Fully Insured & Bonded
Assurance backed by comprehensive insurance and workers compensation coverage for complete peace of mind.
No Subcontracted Labor
Roofs are installed by trained technicians, no subcontractors. This means quality work Every. Single. Time.
Top Secret Clearance
Every employee is background checked, drug tested and has passed top security clearance.
Factory Trained
Expertise honed through rigorous training in top-tier manufacturing environments.
BBB A+ Rating
Recognized excellence validated by the Better Business Bureau’s highest honor.
Long-Term Protection with Maintenance
Great Lakes modified bitumen maintenance plans are built to protect your investment and reduce long-term roofing costs. Small issues, like membrane wear, seam separation, or flashing fatigue, can lead to expensive repairs if left unchecked. That’s why our Pittsburgh-based team offers proactive services designed to catch early warning signs before they turn into costly surprises. We tailor each maintenance plan to your facility’s usage, age, and layout, performing scheduled inspections and documenting the condition of every layer.
Our crews identify problems and fix them on the spot when possible, keeping your roof watertight and code-compliant. With detailed reporting and predictable upkeep, you’ll stay ahead of leaks, drainage issues, and warranty conflicts. Most importantly, you’ll gain clarity on the condition and future lifespan of your roof. From loading docks to government facilities, our clients trust us to preserve the performance and safety of their modified bitumen systems for years to come.
- Visual inspections and moisture scans help detect hidden weaknesses below the surface before leaks occur
- Full reports give your asset management team data-driven insight to support budgeting and facility planning
- Minor repairs and membrane upkeep are handled during routine service visits to minimize future costs
- Leak tracking and resolution ensures any water intrusion is traced to the source and permanently sealed
- Emergency patch and storm support is available for rapid response after hail, wind, or mechanical damage
- Life extension through planned interventions helps delay full replacement with strategic, phased improvements
Certified to Install Great Lakes Modified Bitumen
Every Great Lakes modified bitumen system is installed by trained, in-house crews who specialize in commercial roofing. Our team holds certifications not just for modified bitumen, but for a full range of industry-leading commercial roofing systems. That means every seam, fastener, and layer is installed exactly to spec with no shortcuts, no guesswork.
We follow manufacturer guidelines from the edge metal to the insulation and drainage, ensuring long-term performance and eligibility for full system warranties. Projects are led by seasoned managers who coordinate with building owners, contractors, and inspectors to keep everything on schedule and up to code.
For commercial properties in Pittsburgh, that level of oversight makes a measurable difference. You get a system that’s built to last, backed by product and labor warranties, and supported by a local team that knows how to build commercial roofs that stand up to years of real-world use.
Our Service Areas
- Butler, PA
- Cleveland, OH
- Oil City, PA
- Erie, PA
- Corry, PA
- Monroeville, PA
- Pittsburgh, PA
- Warren, PA
- New Castle, PA
- Meadville, PA
- Cochranton, PA
- McKeesport, PA
Browse our Commercial Roofing Portfolio
Clinton Municipal Airport
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Ashley Furniture
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Dura-Bond Pipe Inc
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Appliance Dealers Co-Op
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Oolong Aisian Cuisine
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We have the experience!
495+
Customers
595+
Completed
Commercial Roofs
18+
Winning Awards
8+
Highly Trained
Project Managers
Testimonial
Don't take our word for it, hear from our customers!
Russell Jenkins
The guys from Great Lakes commercial roofing LLC were extremely professional. Kenneth came out and was extremely informative and knowledgeable in regards to roofing. We were extremely pleased with his work and the end product. We highly recommend Kenneth and the guys from Great Lakes commercial roofing
E Frogwell
When it comes to a company that will get the job done right you have to go with Great Lakes Commercial Roofing. Zac is easy to work with and very knowledgeable about many different products and options. Don’t make the mistake I did and call a contractor that is mainly a residential roofer to look at your industrial roof unless you like wasting money
Tom Havacheck
Great company to work with! I have a building in Pennsylvania but live in another state. My roof was leaking and Zac was sent out and did the inspection on the roof. When he was at the building he called and sent me a link to live pictures
Jason Bakus
These guys are awsome. Great job from start to finish. Did our large commercial catering hall. Always available if we have a question or concern. Roof looks great and best of all. No more leeks. Defiantly recommend
Matthew DeLibero
I’m very satisfied with my new roof. The installers worked around my schedule and did a nice job!
Conrad Miler
Your dedication to quality and service have made working with you a pleasure!
Barb Goliad
I called Great Lakes Commercial Roofing to come check out my building. I had a company put silicone roof coating on it 5 years ago and since day one it never stopped the leaking problems, the other company came out 5 times to “fix the problem” but never did. Zac came out and evaluated my problem and gave me a ton of information on the best solution to fix the problem.
Core Values - C.H.I.L.
- Communication: Maintaining open and clear communication with customers, employees, and vendors.
- Humility: Staying open to feedback, ideas, and other perspectives. Humility means recognizing that we’re all still learning — and better together.
- Integrity: Doing the right thing — even when no one’s looking.
- Loyalty: A deep commitment to the organization’s mission, values, and success.
Schedule a no-pressure roof assessment today!
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