RoofViews

Commercial Roofing

Commercial vs Residential Roofing: What Are the Differences?

By Karen L Edwards

June 14, 2022

Construction workers looking at steel frame building

Every roof is different, and that's especially true when comparing commercial vs residential roofing, also known as low-slope vs steep-slope roofing. Many roofing contractors start out installing residential roofs because they have a low cost of entry. The process requires minimal specialized equipment—most roofers are able to start out with a truck, a ladder, a nail gun, a compressor, and safety gear.

You can earn a great living installing residential roofs. But as your business grows, you may consider installing larger commercial roofs that provide steady work over weeks or even months. Commercial roofing also brings more opportunities for regular service and maintenance, helping you develop relationships with customers. When it comes time to replace their roof, they'll know your company can get the job done.

If you're interested in expanding into commercial roofing, it's important to understand the differences between commercial and residential roofing, from crew size to specialized equipment to financial considerations.

Using Specialized Equipment

Although you can install shingles with a nail gun, the same can't be said for commercial roofing installations. For instance, if you plan to install a thermoplastic single-ply membrane such as GAF EverGuard® TPO, you'll need to invest in hot air welding equipment to weld the seams and handheld welders for the flashing details.

If the system is specified to be an adhered installation, the job may require a spray rig to apply the adhesive efficiently and effectively. In the case of an induction welded system, RhinoBond® induction welding equipment helps secure the membrane and insulation to the roof deck without penetrating the membrane. This equipment can run into the tens of thousands of dollars.

Identifying Crew Size and Experience

A residential roofing crew can range anywhere from four to six workers, who are typically able to reroof an average-sized home in one day. Commercial roofing crews need more people and more time. Depending on the size of the building and the roofing materials involved, commercial roofing replacements can take anywhere from several days to months.

You'll also want to be sure to ensure your crews are properly trained and certified by the manufacturer so that you can offer system warranties or guarantees to building owners for their new roofs.

Reviewing Safety Measures

Safety comes first on every roofing job, and the safety requirements on commercial roofing projects can vary greatly from those on a residential roof. Prepare a comprehensive safety plan for each commercial roof that includes identifying roof access points, establishing safety perimeter lines at the roof edge, locating and flagging potential hazards such as skylights, and reviewing the need for any special fall protection equipment such as weighted anchors or parapet clamps. OSHA safety requirements are readily available in their guide for protecting roofing workers available on www.osha.org.

Considering Financial Concerns

While a residential roofing project may have a short life cycle for installation and payment, a large commercial roofing project can take months to install—and potentially months to get paid following the installation. Many large companies pay on a 30-, 60-, or even 90-day payment system, and will often work retainage into the contract. Retainage refers to a percent of every payment that is withheld until substantial completion of the project- which could mean when most other trades on the job have finished their work as well. You'll need to be sure that your company is in a financial position to wait that length of time before receiving payment, and ensure you're capable of completing the job by any date indicated on the contract to avoid liquidated damages.

The sales life cycle for a large commercial roofing project can take a long time as well. You'll need a good salesperson who can find jobs, build relationships, and work closely with your estimating team to develop a solid bid.

Partnering with Your Manufacturer

Navigating the differences in commercial vs residential roofing can raise new questions for roofers. As you expand your business in a new direction, GAF is here to help you find success with a robust training library and expert videos that allow you to learn at your own pace. This support is available through the Center for the Advancement of Roofing Excellence, which has a host of resources and training to fit your goals and the way you prefer to learn.

Get started by reaching out to your GAF territory manager, who can help you begin your journey in commercial roofing.

RhinoBond® is a registered trademark of OMG, Inc.

About the Author

Karen L. Edwards is a freelance writer for the construction industry and has a passion for roofing, having worked in the industry for 20 years.

Related Articles

Schoolyard with basketball court and school building exterior in the sunny evening. School yard with
Commercial Roofing

Branching Out into Commercial Roof Maintenance for Schools

Commercial roof maintenance programs are a great way to expand your business and build long-term relationships with school facility managers. You may already be offering commercial roof maintenance services, or perhaps you're interested in branching out. Providing roof maintenance to K-12 schools and universities can be a good source of reliable, ongoing work. But you'll need to consider these facilities' nuances.Schools' Current Roof Maintenance ChallengesIn an educational environment, students' safety and comfort come first. Buildings must be secure and functional, and they must provide an atmosphere conducive to learning. Creating this environment starts with the roof, but this can easily be put off or forgotten about as many school facility managers focus on day-to-day maintenance issues. If students and teachers complain about a lack of hot water or classroom temperatures that are too hot or cold, facility managers swiftly address these issues.However, facility managers should prioritize regular roof maintenance in addition to addressing the most immediate facility concerns. Even something like a small leak from deferred roof maintenance can lead to much larger, and more costly repairs, creating headaches for everyone involved, that could have been avoided.The Value of Commercial Roof Maintenance ProgramsThe roof protects everything inside the school—from books and computers to shop equipment and musical instruments. If a roof leaks, many items could suffer damage. At the end of the day, ensuring a quality roof through regular maintenance not only protects everything inside the building, it can also help extend the life of the roof. Moreover, some roofing system manufacturers may require regular roof inspections to maintain warranties or guarantees. A roof maintenance program can meet this requirement, providing inspection records and evidence that any issues were addressed.How to Develop a Maintenance Program for SchoolsA commercial roof maintenance program for schools isn't much different from what you already do for other commercial buildings. And while regular maintenance inspections can be completed anytime, a neglected roof can often end up requiring repairs that need to align with the school's calendar to plan for minimal disruptions to the students. This can cause inconvenient delays, or date changes that could be avoided with regular inspections and maintenance.GAF Senior Product Manager Benjamin Runyan says that it's important to identify the manufacturer of the existing roofing system to ensure you are using compatible products that won't void the warranty or guarantee. "You want to be looking at this from a maintenance standpoint," says Runyan. "What does the roof look like? How was it built? How have they been maintaining it?"To start, Runyan recommends that you inspect the entire roof system and document its condition with photos and notes. Pay particular attention to the more vulnerable areas, such as seams, fasteners, flashings, edge metal, drains, and gutters. Look for cracks, missing roofing materials, evidence of ponding water, or of birds or other animals, and signs of moss or algae. An infrared scan of the roof can determine if any moisture is present and help pinpoint areas that need immediate attention.Your program should include basic tasks such as clearing debris from drains and gutters, removing leaves or branches, and making minor repairs where existing sealants are losing pliability or are showing signs of deterioration. If you identify larger concerns, you can document that with photos and provide an estimate for the repairs. Also, note how long the repairs should take and what products you'll use.Getting Started with SchoolsPreventative maintenance programs aren't just a benefit to the schools, they can also lead to other school roofing work including re-roofing opportunities. If you're ready to add school commercial maintenance programs to your business plan, GAF has the resources you need to get started. Runyan explains, "Your first step should be talking with your GAF Territory Manager as they will likely already have established relationships with school districts, colleges, roof consultants and architects in your service area."From commercial roofing system specifications to WellRoof® Guarantee Extensions, plus roof restoration options, GAF meets all your needs for stepping into the world of educational buildings.

By Authors Karen L Edwards

March 06, 2024

A smiling group of men and women gather in front of a red expo backdrop for a photo.
In Your Community

Supporting Latino Roofing Professionals at the 2nd Annual Latinos in Roofing Expo

Spirits were high at the second annual GAF Latinos in Roofing Expo, where more than 600 Latino roofing professionals gathered in Houston, Texas, for networking, business growth, and education seminars—all in Spanish. "To have a conference dedicated to Latinos, I love it," says Jorge Parada. "I'm sitting next to somebody that looks like me, that speaks the same language. It's a different experience from other conferences."Empowering Attendees at the Latinos in Roofing ExpoThe Latinos in Roofing Expo is one way GAF is working to level the playing field for Latino roofing professionals. Rather than take a one-size-fits-all approach, the expo provides education and resources that consider the Latino community's unique challenges. For example, industry experts taught classes in Spanish such as The Power of Latinos in Your Company's Culture, In-home Selling, Single Ply TPO, Coatings, and The Power of Content Creation for Roofing Companies.In addition to networking with other top-tier contractors, attendees received education in Spanish about the newest GAF contractor products, programs, and trainings designed to help roofers run—and grow—their companies. According to several attendees, these "culturally intended" business growth sessions, offered in Spanish, were one of the most valuable aspects of the conference.Many other conferences and training opportunities expect Latino roofing professionals to thrive with resources that cater to the non-Hispanic, English-speaking contractor community. In contrast, the Latinos in Roofing Expo empowered attendees through culturally intended offerings and shared language."The majority of these [Hispanic] contractors speak English, but it's also cultural. So, the way we do business has to feel culturally intended. Do business like Hispanics do business. Speak the language Hispanics speak," says Alan Lopez, GAF CARE training operations manager. Lopez has been a leading advocate for Latino roofing contractors at GAF and in the roofing industry as a whole.Improving Latino Roofers' Access to ResourcesMany Latino roofers have experienced disadvantages when rising in the roofing ranks because of language and/or cultural differences. For too long, the industry has pigeonholed Latinos into labor roles. As a result, Latinos are drastically underrepresented in roofing leadership, despite making up 57.7% of the roofing industry. Improving access to resources and cultural interactions is a sign of the roofing industry evolving."GAF is the front-runner in helping Latinos, because they have given us so many free resources and free seminars in Spanish," says conference attendee Junior Garcia, CEO. "They have allowed us to get to know what other [non-Hispanic] contractors already know." Some of the GAF culturally intended resources include:Spanish-language GAF website with the same user-friendly features as the English-language GAF website.Spanish-language GAF Document Library for Residential and Commercial GAF roofing products, including technical bulletins, warranty guarantees, data sheets, and more.Spanish-language GAF CARE trainings and resources, including business development courses, hands-on-trainings, and more—all taught with the needs of Latino contractors in mind.Spanish-language events, such as the 2023 GAF Latinos in Roofing Expo, designed to develop Hispanics in roofing leadership.Connecting with Latino ConsumersDeveloping Latino contractors also creates a powerful financial opportunity to serve Latino consumers. This benefits Hispanics in roofing and the roofing industry as a whole.Too often, Latino consumers are overlooked and underestimated. In fact, the Latino consumer base currently has unmet needs of more than $100 billion. Empowering Latino roofers to develop and grow as business leaders is one way to help bring change. "If you want to do business with the Latino community, you have to speak their language," says Hugo Saldaña, GAF territory manager in Houston, Texas.Speaking as a Latino professional in the roofing industry, Saldaña explains that people are at the heart of increasing a consumer base and growing contractor opportunities. "My parents preferred to do business with people who also spoke Spanish, their native language," says Saldaña. "Every day, when I go into work with these guys, it's like helping my dad or my mom. I think when you do that, and these guys know there's a caring relationship there, it goes a long way."Moving Towards the FutureLatinas in RoofingWhile the Latinos in Roofing Expo is a huge win, GAF and the roofing industry still have opportunities to grow. For example, GAF recognizes that female Latina roofing professionals may experience more challenges than their male counterparts. "There are a lot of challenges we [women roofing professionals] face, but there are opportunities for leadership. Now there are more resources and training and more opportunities to build our skills and build our knowledge, and be able to have the same opportunities as men," says Valeria Avila of Servi Express Roofing. GAF provides opportunities to empower women in roofing and recognizes the benefit of forming better bridges between women and the roofing industry.Resources for GrowthAlthough there is work to be done, the 2023 GAF Latinos in Roofing Expo is another step forward for the roofing industry. "Our company has done an amazing job—we now have a Spanish website and cater a lot to the Hispanic community, but there's still greater need," said Andres Beltran, a GAF CARE training manager based in Greenville, South Carolina.As the industry continues to evolve, Beltran encourages Latino roofers to connect with the free, Spanish-language training services and business development opportunities at GAF CARE Contractor Training Centers. "Whether it be from a marketing standpoint, financing, business development, leadership, insurance, and restoration—we can help Latino contractors to elevate their game," says Beltran.Learn more (in Spanish) about GAF resources and GAF certification opportunities today.

By Authors Annie Crawford

January 17, 2024

A GAF Roofing Academy instructor shows a student how to cut and measure roofing materials.
In Your Community

GAF Roofing Academy Benefits Graduates and Contractors in Southern California

This past fall, more than 50 students participated in GAF Roofing Academy training week in Southern California. The free, week-long event united roofing leaders, contractors, and aspiring roofers, eager to learn the trade. The event concluded with a career fair, which allowed students to immediately meet with potential employers. GAF is a leading proponent of roofing education and training, providing countless opportunities like this to align industry leaders, reduce the industry labor shortage, and empower communities from the ground up with long-term, well-paying roofing opportunities.Helping the Roofing Industry and Graduates"The roofing industry is dealing with a labor shortage and lack of skilled labor," says Scott Bolt, a third-generation roofer and president of Celoseal Roofing in Orange, California. "GAF is the only manufacturer in the construction—not just the roofing but the construction—industry that is listening to the call that contractors need help. The fact that GAF provides contractors with highly organized events like this, with eager recruits and competent trainers—it means a lot to me."The Roofing Academy was just as valuable to the graduates. "I got a roofing job starting this Monday," says GAF Roofing Academy graduate Joncele Cavona Soto. Soto, a US military veteran born in Puerto Rico, served for years while deployed around the world. Recently searching job sites, he learned about the Roofing Academy training. "I applied, was accepted, and now I have a roofing job just one month after leaving the military. This is big for me," he says.Preparing Students for SuccessThe SoCal training covered three key industry sectors: residential steep-slope roofing, commercial low-slope roofing, and roofing sales and insurance. Students chose one focus, then participated in a five-day course combining in-classroom education and hands-on training. Throughout the event, they gained the necessary basic skills to begin a roofing career. The courses were hosted by three GAF certified contractors, eager to share their expertise with the next generation of roofers.BYLTup from Long Beach, California, taught the residential steep-slope roofing class.Celoseal Roofing from Orange, California, taught the commercial low-slope roofing class.Antis Roofing & Waterproofing from Irvine, California, taught the sales and insurance class."When GAF wants to do anything, Antis wants to partner with them," says Charles Antis, owner of Antis Roofing & Waterproofing. "Yesterday, GAF donated 60 squares of shingles to the Sister League of San Diego that we installed." The GAF Community Matters ethos matters to Antis. "We can go into communities across the country and bring people into the trades that otherwise wouldn't get here. I'm super gung-ho about the GAF Roofing Academy," he says. His business has partnered with GAF on seven roofing classes over the years, plus the roofing sales and insurance course at the Roofing Academy event.Students weren't required to have experience—just a passion to learn the trade. "I saw GAF Roofing Academy scrolling through Instagram," says 22-year-old Angelique Mojina from Fontana, California. "I clicked and I signed myself up. I wanted to leave warehouse work and this was my opportunity." Now that Mojina has graduated, the ability to put a roof over someone's home gives her a feeling of gratitude and accomplishment.Securing Jobs and Reducing Labor ShortagesWorkers and companies who participated in the GAF Roofing Academy training week enjoyed immediate benefits.At the career fair, Nathan Blackburn, general manager at Celoseal Roofing, says, "We've hired 20 people today. It's amazing. We've complained for years about not being able to find qualified employees, and now I've got 20 eager people knocking on my door who just spent a week learning how to roof. They want to work; they want this opportunity."The academy also fostered mutually beneficial relationships. Bolt of Celoseal Roofing worked side by side with students in his commercial low-slope roofing class. One student in the class brought him a job application, and he offered him a position with Celoseal Roofing on the spot. "Over the week, I had seen his natural potential, ambition, compassion for co-workers, and leadership skills," he says. "He's looking for a career and a change of direction in his life, and we have something to offer him. He'll onboard Monday, so we have our first recruit."Fostering a Rewarding Career PathThe GAF Roofing Academy offers a new path forward for students of all walks of life. Jacob Mosprey from Anaheim, California, worked in security for 17 years. "In security, you secure property and protect life, but you're not held in high regard. And there was no growth opportunity," he says. "I have a wife and three kids. I want my wife to know she has a husband who has a respectable career."Mosprey's journey is a powerful and hard-won story of perseverance. "During my life, I did go through homelessness, and I was incarcerated a couple of times," says Mosprey. "Now... I appreciate my struggles." Participating in the Roofing Academy has given him a new skill set and an opportunity to improve his own life, as well as the lives of others.Interested in participating in the GAF Roofing Academy and changing your trajectory? Enroll as a student today or partner with GAF Roofing Academy as a contractor.

By Authors Annie Crawford

January 03, 2024

Don't miss another GAF RoofViews post!

Subscribe now