Industrial warehouse building with flat, commercial roof, covered with white TPO roofing

Alliant Roofing Company

Alliant Roofing Company provides client-centered, commercial roof replacement, inspection, maintenance, and repair services.

Grocery store TPO roof recover in progress - Coeur d'Alene, ID

Commercial Roof Replacement

Alliant Roofing Company’s commercial reroofing services are unmatched for reliability and workmanship. We use only the top-quality single-ply roofing systems for commercial roof installation.

Commercial Flat Roof with Clogged Roof Drain, Leaves, and Muck

Commercial Roof Service

Keeping your commercial roof watertight is Alliant Roofing’s highest priority with minimal disruption to your business. Responsiveness, integrity, and craftsmanship are the three keys to success of our Commercial Roof Service.

Commercial Flat Roof Replacement Crew Working Safely And Efficiently - Aerial View

Roof Asset Management

Routine maintenance can extend the life of your investment and lower the life cycle cost of your roof. Manufacturers require maintaining your roof at least twice a year regardless of your location. Failure to maintain your commercial or industrial roof will result in the deterioration of your roof system and void your warranty. All new commercial roof replacement customers automatically are enrolled in our Roof Asset Management Program, thus entitling them to twice-yearly inspection and maintenance.

GAF® Master Select™ Commercial Roofing Contractor
Versico Roofing Systems
FiberTite® - Seaman Corporation

Benefits Of Selecting Alliant Roofing Company


Meeting Your Needs Is Our Top Priority

We are single-minded in our devotion to provide you with the best product, service, and workmanship in the commercial roofing industry.


We Are Motivated And Focused

Alliant Roofing concentrates on what we know, what we do well, and what we can do better. As your roofing needs change, we are prepared to offer the most innovative roofing products and best practices.

Inspiration Comes From Everyone

Our employees feel that they have a stake in the success in the company and are accountable for company performance, from idea creation through delivery.

Cost Is Critical

Our prices are a true reflection of material, supplier, and labor costs. You get a free, accurate estimate of your roofing project before we begin work.


Since 1907, we continue to devote time, attention, and exceptional service to our customers.

Free Commercial Roof Inspection

Schedule a Free Commercial Roof Inspection by an experienced roof professional. (Seattle Metro Residents call 1-833-228-8622.)

Blog Posts About Alliant Roofing Company Services

Newport Hospital Roof Replacement Overcomes Obstacles

Newport Hospital Roof Replacement Overcomes Obstacles

Newport Hospital & Health Services After TPO Roof Replacement Project Completion Obstacles to success are many in the commercial roofing business. The only way to overcome those obstacles is to do whatever it takes to make a job successful. The Newport Hospital roof...

Commercial Roof Recover Keeps Greenies Rolling

Commercial Roof Recover Keeps Greenies Rolling

Greenies Bike Shop, Richland, WA Storefront When a leaky store roof threatened to disrupt Greenies Bike Shop’s business operations, Alliant Roofing Company jumped into action. We conducted a free commercial roof inspection, which revealed the 15-year-old single-ply...

Industrial Warehouse Flat Roof Recover Fixes Drainage Problems

Industrial Warehouse Flat Roof Recover Fixes Drainage Problems

44,000 Square Foot Industrial Warehouse Flat Roof Recovered In TPO Membrane Over EPDM When you think about a new roof, drainage might not be the first thing that comes to mind. Alliant Roofing Company recently completed a 44,000 square foot industrial roof replacement...