Commercial roofing you can count on.

Solve Your Roof Problems For Less !

We are a licensed roofing contractor and general contractor specializing in commercial building services. We serve property managers and building owners.

Our excellent safety record saves you 11-17% on commercial roofing projects. 

Winter is coming. Is your roof ready for the rain? Our roof maintenance packages come with a no-leak guarantee » 

Need a trusted roofing service? We are here to help! 

Call us for a free quote at  (925) 548-9748 

Click for more about our commercial construction services »

We follow state and county COVID-19 guidelines to ensure your safety. More »

A Licensed Bay Area 
Commercial Roofing Contractor

Serving Northern California
For 18 Years

Commercial Roofing Projects Spotlight

Novato Firestone Single Ply
66,00 sq ft
Firestone TPO
Novato
Skilled Nursing Facility

Drone shot of roof covered in solar panels TPO single ply membrane at Kohl's roof in Petaluma.65,000 sq ft Acrylic Roof Coating over TPO Kohl’s, Petaluma Retail


50,000 sq ft
TPO & Composition Shingle
Yuba City
Assisted Living Facility

An 80,000 sq ft acrylic roof coating system in El Cerrito. 80,000 sq ft Silicone Roof Coating El Cerrito Shopping Center Retail

Project Highlight Videos

C&H Sugar Factory Sign and Brick Building with Two Silos

This was a Tremco AlphaGuard BIO roof restoration for C&H Sugar in Crockett, CA. View video »

This silicone roof restoration was for the City of Walnut Creek’s Tice Valley Gymnasium. View video »

Walnut Creek City Hall Roof with solar panels

This skylight restoration was on City Hall for the City of Walnut Creek. Click to view video »

Premier Commercial Roofing Solutions You Can Trust

Our men installing two medium-sized TPO single ply roofs.

For two decades, we’ve built our reputation as one of the premier commercial roofing companies in Northern California with:

Transparent Quotes

We value your time, so we provide quick, comprehensive, hassle-free quotes, at no charge. Got questions? We’re happy to answer them.

Professional Craftsmanship

We do high-quality work on time and on budget. Our certified team is up to date on the latest and greatest processes, tools, and methods to ensure you receive the best possible installation or repairs. 

Friendly Customer Service

Our customers come first. We actively listen to your needs because your satisfaction is the key to our success. We treat you with respect, maintaining clean job sites, answering questions, and doing our best to exceed your expectations.

Value Engineering

We love to think outside of the box if your project presents a unique challenge.

The Highest Quality Materials

We only use reputable, high-quality materials, but they are only as good as the people installing them. That’s why we regularly inspect our jobs to make sure no details are left unfinished.

Need a high-quality roofing company you can depend on?
Call us at (925) 548-9748 for more information.

Our Customer Testimonials

"My company has relied on ACS as a valued resource for roofing and waterproofing for some years now. [...] Timely and comprehensive proposals. Competitive pricing. Workable scheduling. Efficient and courteous workforce. Knowledgeable and experienced sales, management and office staff. Work product of the highest quality. [...] We look no further than ACS for our Roofing and Waterproofing needs. Highly recommend.""
Tom Hastings
Business Owner
Bill D[...] always put the customers first always willing to go beyond the normal to assist us."
Lawrence Stauffer
Building Owner
"The best company we have worked with for our roofing needs. Mousa, who heads their crews, is one of the most professional and competent employee a company could want. When his crews were booked and couldn't get out to us immediately, he personally took care of us. This company has great employees and we will continue to use them for all our construction needs. We highly recommend them."
Julie
Business Owner, Trey Jay LLC
"The foreman had the greatest attitude. He went above and beyond."
Christophe Nussbaumer
Operations Manager, City Hope

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