(406) 453-7000
(406) 453-7000Expert Commercial Roofing Service in Lewistown, MT
The Best Roofing North Central Montana Can Provide
Over 20 Years of Experience
 24-Hour Emergency Services
 Military Discounts & Return Customer Discount
Montana weather doesn’t mess around, and your commercial building needs a roof built to handle our intense weather. At A-1 Contractors, Inc., we deliver elite-grade craftsmanship and honest service to keep your business fully protected without relying on out-of-town storm chasers. We operate with 100% in-house crews, never subcontractors, so you get tight quality control and direct owner oversight.
Commercial Roofing Services We Offer
Commercial Roof Replacement & Installation
We install high-performance commercial systems built for long-term durability and extreme weather resistance. Our single-unit crews work fast to tear off and replace your roof with minimal disruption to your daily business operations.
Commercial Roof Repair and Maintenance
From sudden wind damage to persistent leaks, our team provides fast response times and 24/7 emergency service to fix issues before they compromise your inventory or facility. Regular maintenance plans keep your roof leak-free and extend its working lifespan.
Commercial Roof Coatings
Restore your existing flat or low-slope roof while slashing energy bills with elastomeric and reflective roof coatings. These seamless barriers seal leaks, stop rust, and add years of protection without the expense of a full tear-off.
The Types of Commercial Roofs We Install
We install top-tier flat and low-slope systems backed by industry-leading warranties, including 20-Year NDL options on GAF flat systems.
EPDM Roofing
EPDM (synthetic rubber) is an extremely durable membrane known for resisting severe thermal shock and extreme cold. It stays flexible through harsh Lewistown winters to prevent cracking and leaking.
TPO Roofing
TPO is a heat-weldable single-ply membrane that offers superior puncture resistance and energy efficiency. Its bright reflective surface lowers cooling costs during hot Montana summers.
PVC Roofing
PVC roofing provides exceptional chemical resistance and ultra-strong heat-welded seams. It is the ideal choice for facilities, restaurants, and industrial buildings requiring maximum durability against grease and severe weather.
Flat Roofing
Our custom flat roofing solutions feature built-up and modified bitumen options designed to handle heavy snow loads and standing water. Every installation comes backed by our robust 10-Year commercial workmanship warranty.
Commercial Projects We Work On
From industrial facilities to residential complexes across North Central Montana, we provide comprehensive commercial roofing services for a wide variety of properties:
- Apartment Properties: Complete multi-unit roof replacements and fast leak repairs designed to keep your tenants safe and dry.
- Assisted Living Facilities: Low-disruption roofing services planned carefully around the safety and comfort of your residents.
- Churches: Expert care for community spaces, offering long-lasting weather protection and clean job sites.
- HOA Properties: Reliable, scheduled roofing maintenance and replacements that meet community standards and board budgets.
- Multifamily Properties: Fast turnarounds on large-scale complexes to protect property values and prevent interior damage.
Why Lewistown Business Owners Choose A-1 Contractors, Inc.
For nearly two decades, local business owners have trusted A-1 Contractors, Inc. because we treat our customers like neighbors, not single transactions. As a 3rd-generation roofer holding GAF Master Elite status (a distinction earned by only the top 3% of contractors nationwide), we bring serious muscle and proven expertise to every job site.
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When severe weather hits, out-of-town companies flood in and disappear just as fast. We live and work right here in North Central Montana, standing behind our work with direct owner accountability and long-term warranties.
Frequently Asked Questions
Do you use subcontractors for commercial roofing jobs in Lewistown?
No. We never rely on subcontractors or temporary crews. Every project is handled by our 100% full-time, in-house employees, ensuring strict quality control, clear communication, and direct owner oversight from start to finish.
How fast can I get a commercial roofing estimate for my business?
We guarantee same-day estimates following our initial consultation and roof inspection. Our single-unit crew structure allows us to respond fast, so you can make informed decisions without delaying your business operations.
What commercial roofing warranties do you offer?
We back our flat and low-slope commercial installations with robust warranties, including up to 20-Year NDL (No Dollar Limit) coverage on GAF flat systems, alongside our standard 10-Year commercial workmanship warranty. As a GAF Master Elite contractor, a credential held by only the top 3% of contractors nationwide, we provide manufacturer-backed guarantees you can rely on for decades.
How do your commercial flat roofs stand up to Montana’s extreme weather?
Our EPDM, TPO, PVC, and modified bitumen systems are custom-engineered for North Central Montana’s drastic climate swings (-20°F winters to 100°F summers and 90+ mph winds). We install heavy-duty single-ply membranes with heat-welded seams and high thermal shock resistance to prevent ice damming, snow load damage, and wind uplift leaks.
Protect Your Lewistown Business Today
Don’t wait for a minor ceiling leak to turn into costly structural damage. Partner with a local contractor who brings 100% in-house crews, zero deposit requirements, and decades of Montana experience to your project.
Recent Reviews from our Lincoln Customers
A-1 Contractors, Inc.
2755 Fern Dr, Great Falls
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Highly Recommended – Honest & Professional
A-1 Contractors, Inc. truly saved the day! After another company installed a new roof that soon developed … More problems, the original installer refused to come back and look at it. A-1 was willing to come out, perform a thorough inspection, and provide professional insight. They were incredibly understanding, helpful, and highly skilled. They restored my trust in quality contracting. I cannot recommend them highly enough for their expertise and integrity. -
100% recommend A1 to do your roof. Insurance paperwork was a nightmare but their estimator Chad bent over backwards to help figure ot out and straighten … More it out for me and the Insurance. Roof of garage and house were done in 1 day and looked like thery were never there on the clean up. Awesome company.
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They are amazing! My mother needed a last minute replacement on her roof for the sale of the house. Within 24 hours they had the estimate back to us and … More the job scheduled. They did everything they had to so they could squeeze us in last minute. They job was done within two days! We have had roofs replaced before and usually find nails and wood all over the yard after. I couldnt believe how clean the yard was after! They really came through for us in a critical moment. We appreciate them and their professionalism so much!
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