Superior Commercial Roofing Services in Orange County
Our Integrity is Our Promise
The Top-Rated Orange County Commercial Roofers
If you own a commercial property, a roofing project can have a big impact on your business. Even a small roof leak or a few missing shingles could tarnish the image of a high-end shop or hotel. A major leak might damage inventory at a warehouse or completely shut down operations at an industrial facility. Fortunately, you can rely on Guardian Roofs to help keep your commercial roof in excellent condition.
- Safety: Safety is the most important factor in any commercial roofing project. Our safety record is backed up by years of experience and safety protocols.
- Quality: Guardian Roofs has completed some of the largest commercial roofing projects in Orange County. We deliver each project using our quality standards, products, and job procedures.
- Integrity: We are a well-respected commercial roofing company because of our top-down integrity. With years of experience, our reputation is what keeps us at the forefront of the industry.
Commercial Roofing Services We Offer
From large scale to small scale projects, we strive to offer a number of commercial roofing services to keep our clients happy including:
Commercial Roof Replacement & Installation
If you’re building a new commercial facility or replacing an old commercial roof, contact Guardian Roofs for your commercial roof installation or replacement. We use only the highest quality materials and the most skilled roofers in the area. That’s why you can count on Guardian Roofs to complete your commercial roof installation or replacement in a quality, affordable, and timely manner.
Commercial Roof Repairs
Guardian Roofs also offers commercial roof repairs. No matter what and how your roof’s damage was caused, we’ll send our team out right away to resolve your issue. We are here to ensure that your building isn’t at risk of water leaks and damage.
Commercial Roof Maintenance
Another important step for taking care of your commercial roof is to conduct regular maintenance. You should be caulking the seams, replacing displaced flashing, and fixing any other issues that you run across. If you don’t have time for that, Guardian Roofs can help! With over 36 years of experience, you can trust that we’ll do the job right.
Commercial Roof Inspections
Just like cars and houses, your roof should also be inspected from time to time. Chances are that you don’t have time to conduct commercial roof estimates on your own. You may also not know exactly what to look for! At Guardian Roofs, we know the ins and outs of commercial roofs and know exactly what to look out for to keep your roof happy and healthy.
The Types of Commercial Roofs We Install
Built-Up Roofs (BUR)
Most flat roofs you see are built-up roofs (BUR).This low-maintenance roof is commonly referred to as “tar and gravel” roofs because they are installed using layers of asphalt or tar right on top of the roof. When properly installed, your BUR roof can last up to 40 years.
Modified Bitumen Roof
Modified bitumen roofs can be installed with a torch-down or cold adhesive system. This is a great alternative when your commercial property requires low VOC (volatile organic compounds). Let’s just say that modified bitumen is less smelly than asphalt heated to 425ºF — which is required for built-up roof installations.
TPO Roofs
TPO Roofs are a single-ply roofing membrane of thermoplastic polyolefin. One of the greener single-ply roof materials out there, it is quite popular for flat or almost flat roofs. These roofs stay flexible in many climates and are great for lowering your energy bills.
PVC Roofs
Polyvinyl chloride, or PVC, is another single-ply roofing option that has long been used on flat roofs. It is durable, fire resistant, and environmentally friendly. Its strength and durability means it can last over 20 years when well-maintained.
Flat Roofs
You may have noticed that many commercial buildings have flat or low-slope roofs. That’s because these are affordable to install, repair, and maintain. Another advantage of flat roofing is that it creates a versatile space that can be used as a secondary space. However, flat roofs generally require more care for efficient draining. Our experts can help make sure your flat roof is properly installed AND maintained!
Roof Coatings
Roof coatings are essential for prolonging the life of your roof. In fact, this may be a great solution if your roof needs a bit of TLC, but is not quite ready for a full-on replacement. We’ll be happy to go over the best options to coat your roof so that it can serve you just a little bit longer.
Recently Completed Commercial Projects
Commercial Projects We Work On
From commercial buildings to multifamily apartment complexes, we provide commercial services to a wide variety of clients. This includes:
Contact Us for Your Free Project Estimate
At Guardian Roofs, we understand the special needs of commercial clients. We work on all kinds of commercial roof systems, including built-up roofs, modified roof systems, and single-ply roof systems. Our roofers are true experts in all the different materials we offer. You can rely on us to get the job done right the first time! We always present a professional appearance when working on your property and never leave a mess behind for your staff to clean up. When you need your roofing project done on time, on budget, and to a high-quality standard, we’re here for you! Call Orange County’s leading roofing company today!
Reviews
Guardian Roofs
1010 North Batavia Street Suite F, Orange
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My wife and I are so impressed. Thoroughly professional in every aspect! The timeliness was accurate from the moment we met Doug and then Diana and their follow up and follow through were outstanding!! The Crew were so clean and neat, showing … More up before their start time with complete respect and deference for our property. Quite frankly , we have never met or had a professional experience like this before. Each night they left the property clean as can be .... and took great pride in their work!! Such polite crew that we were delighted to see them daily.
Thank You Guardian!! KUDOS.
Everyone there deserves all the benefits and credit as they reflect your company's integrity and supreme work ethics.
Cannot recommend highly enough!! -
My home in Pasadena was built in 1896, and after it sustained significant wind-related roof damage following the Eaton Fire back in early January of 2025—a destructive wildfire that impacted nearby Altadena—I knew I needed a roofing company … More with the expertise to restore and protect a structure of this age. Guardian Roofs & Energy Solutions delivered at every step.
Although my home is a historic property, it is not an official contributor to Pasadena’s Historic Preservation Program. That said, Guardian approached the project with the same level of care, respect, and craftsmanship you would expect for a landmark building. They went above and beyond to ensure the structural integrity and historical character of my 125+ year-old home were preserved throughout the entire process.
Estimator Justin Sudduth was outstanding—he provided a detailed breakdown of the scope of work, including tear-off and removal of old roofing layers, radiant barrier sheathing, laminated shingle installation, upgraded flashing, new ventilation systems, and more. His communication was clear and proactive, helping me understand each phase of the project and how it would contribute to both performance and longevity.
What truly set Guardian apart was their ability to navigate the permitting process and coordinate with city officials, even ensuring appropriate documentation for the home’s age and significance. While my property wasn't subject to formal historic review, their commitment to following best practices in preservation and compliance was evident and deeply appreciated.
On site, Bill Scot, the operator, led a highly skilled and professional crew. They were punctual, respectful of the property, and maintained a clean, organized job site throughout. Bill’s oversight and communication ensured the entire project stayed on track and was executed with excellence.
Guardian didn’t just repair my roof—they honored the history of my home while strengthening it for the future. Their professionalism, attention to detail, and respect for both modern standards and historical elements make them an exceptional contractor.
If you’re seeking a roofing company that can handle complex, age-sensitive projects—especially those involving post-disaster recovery or historic homes—I wholeheartedly recommend Guardian Roofs & Energy Solutions. They’ve earned my trust and gratitude.
— Javier Orozco, Pasadena, CA -
We just got a new solar roof from Guardian and I want to give a 5 star shout out to Carlos Castellanos and his team for the great job they did. They were on time and kept everything clean at the end of the day. They arrived with a smile … More and were a pleasure to work with. They were not scheduled to work the day the inspector came but Carlos felt it looked like rain so he coordinated with the inspector and came in the afternoon. He and his crew stayed until the roof was covered and it did rain that night. They came back the next day and finished the roof. Wonderful crew. It was a pleasure to work with them.
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5-Star Review for Mario and Guardian Roofs
I cannot recommend Mario and Guardian Roofs highly enough! From start to finish, the experience was exceptional. Mario worked with my schedule, ensuring the project began at my convenience, and … More everything was done on time. The crew was professional, careful, and hard-working, leaving the site spotless each day.
What truly sets Guardian Roofs apart is their attention to detail and fairness. Their pricing was reasonable, and Mario was always available, promptly returning any calls or texts. They were the only roofing company that painted the replaced fascia boards at no extra cost—a small but impactful touch that shows their commitment to excellence.
Mario himself was personable, honest, and went above and beyond to ensure the project met and exceeded our expectations. He made sure we were completely satisfied before considering the job done.
Thank you, Mario, and the entire crew at Guardian Roofs, for the outstanding work! If you’re looking for a roofing company you can trust, look no further. They are the best in the business! -
Both my wife and I have been extremely satisfied with everyone from Guardian Roofs. Doug Hein is one sharp guy. My neighbor and I were so impressed with him that we both decided to get our roofs done after meeting with 5 different companies. … More
Mario was the superintendent responsible for the job and called me consistently to see how things were going and answered every question I had. Alex was my main contact throughout the job and arrived at 7:00 am everyday which I appreciated. He was very personable and I did my best to let him do his job. Whenever there was an area that had to be addressed, Alex would talk to me prior to changing anything without my permission. Freddie did a fantastic job of laying out the tiles and was very efficient and clean. My house was cleaned every day and I never had any issues. Mona Portillo along with Helen were great to work with from the office as well. As I mentioned earlier, Guardian Roofs went above and beyond my expectations!! Thank you for making us very happy.
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