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Commercial Roofing


TWM Roofing has been a leader in commercial roofing for years, going above and beyond, setting standards before they became industry standards. When you work with us, you get the highest quality.

 Commercial Roofing Systems

The Quality You're Looking For

Understanding commercial roofing systems is crucial for your business looking to protect your investments, maintain the integrity of your buildings and avoid loss of production or damage to valuable inventory or equipment. A well-designed and properly maintained roof not only provides shelter but also contributes to energy efficiency, durability, and overall property value. TWM Roofing has been an industry leader for over 40 years, providing commercial, industrial, and municipal roofing in San Diego, Temecula Valley, Orange County, Riverside, San Bernadino and Los Angeles.

TWM is one of three ASC Premier Certified Contractors in the state of California, one of a handful of Elite Certified Contractors with Gaco coatings and among the 2% of nationwide contractors that have attained the GAF Master Elite certification. This factory training and certification along with certifications and factory training with Firestone, John Manville, Owens Corning, Eagle Tile, US Tile, Carlisle / Mulehide and other leading roofing manufacturers allows TWM to offer warranties that the average roofing company can’t, including flat roof systems that even cover flat roofs with permanent ponding water.
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Property Management Services


Property managers love working with TWM Roofing! Our fully staffed office handles every phase, from your first call to schedule an estimate or roof inspection to warranty registration on a completed project. We have dedicated personnel to manage work orders, estimates, insurance certificates, project scheduling, warranty registration and all aspects of management for simple repairs to entire industrial, commercial or HOA projects. We ensure your investors and owners receive top-notch service, enhancing your reputation and giving you confidence in the quality of work. Call us with your roofing problems, and they will no longer be your problem. Let TWM Roofing make you look good!

Commercial & Industrial Roofing Services


Our services encompass new roof installations, leak repairs (both minor and major), Cool Roof coating systems, flat roof restoration and repairs, and preventative maintenance programs. At TWM Roofing, we strive to maximize the serviceable life of your existing roof system. Our commercial roofing division caters to the needs of various sectors, including manufacturing facilities, office buildings, schools, churches, retail stores, small businesses, HOA’s and apartment complexes.

Video: Western Colloid Flat Roof Installation

View TWM Roofing's large-scale commercial roofing project in San Diego. We installed a Western Colloid Flat Roof, an energy-efficient “cool roof” with a Class A Fire rating. 

This advanced roofing system is specifically designed to meet the demands of the San Diego climate, offering superior protection, energy savings, and long-term durability. You will learn more about the benefits of cool roofs and why they are an ideal choice for commercial properties in Southern California.

Types of Commercial Roofing Systems


Roof Coatings / Roof Restoration / Cool Roof Systems
Cool Rated roof coating applications are the ideal choice for commercial buildings in the unrelenting sun of Southern California. Beyond their aesthetic appeal, cool roof coatings significantly enhance the durability of your roof. Depending on the size and condition of your roof, applying a cool coating can save your business up to 50% compared to the cost of installing an entirely new roof and we have Cool Roofs that have 20-year non-prorated material and labor warranties backed by Firestone / Genflex, Holcim Gaco, ASC, Carlisle / Mulehide and other leading roofing manufacturers.
  • Energy Savings: Reflects more sunlight and absorbs less heat, reducing cooling costs.
  • Extended Roof Life: Protects the roof surface from UV radiation and thermal expansion, prolonging its lifespan.
  • Environmental Benefits: Reduces the urban heat island effect, contributing to cooler city environments and reduces the carbon footprint by restoring your existing roof system rather than removing and replacing it.
  • Cost Efficiency: Lower upfront costs compared to a complete roof replacement, offering substantial savings.
  • Tax Benefit: Some TWM commercial customers write off coating applications as roof repairs and maintenance rather than pro-rating the cost over the life of the roof system – check with your CPA.
  • Improved Comfort: Keeps the building interior cooler, enhancing comfort for occupants.

Thermoplastic Olefin (TPO) Roofing
TPO roofing systems are known as the gold standard in commercial roofing due to their energy efficiency and ease of installation. They are single-ply membranes composed of polypropylene and ethylene-propylene rubber. TPO offers exceptional warranties and proven performance even under the most complex and poorly designed commercial flat roof. TWM Roofing is a certified Firestone and Carlisle TPO contractor providing the ultimate reliability backed by Firestone and Carlisle.
  • Energy Efficiency: TPO membranes reflect UV rays, reducing cooling costs and improving energy efficiency. We can install R5.6 to R23.6 rated insulation in our TPO roof systems providing unparalleled energy efficiency.
  • Durability: TPO roofs are resistant to tears, punctures, and impact damage, making them a durable option for commercial buildings and Firestone TPO has no exclusion for ponding water when installed by a Firestone certified roofing contractor like TWM Roofing.
  • Environmental Friendliness: TPO is 100% recyclable, making it an environmentally responsible choice.

Built-Up Roofing (BUR)
Built-up roofing (BUR) is one of the oldest and most reliable commercial roofing systems. It consists of multiple layers of bitumen and reinforcing fabrics. These layers are applied in an alternating pattern and finished with a top layer of aggregate or coating.
  • Durability: BUR systems are known for their exceptional durability and can last up to 30 years with proper maintenance.
  • Weather Resistance: The multiple layers provide excellent protection against harsh weather conditions, including heavy rain, snow, and high winds.
  • Thermal Performance: The insulating layers in BUR systems contribute to energy efficiency by maintaining indoor temperatures.

Modified Bitumen Roofing

Modified bitumen roofing is an evolution of BUR, incorporating polymer-modified bitumen. This roofing system is applied in multiple layers, often with a torch, hot asphalt, or cold adhesive.
  • Flexibility: Modified bitumen is highly flexible, making it ideal for buildings that experience significant temperature fluctuations.
  • Ease of Installation: The installation process is straightforward and can be completed relatively quickly, reducing labor costs.
  • Durability: With proper maintenance, modified bitumen roofs can last between 20 to 25 years.

Ethylene Propylene Diene Monomer (EPDM) Roofing
EPDM roofing, commonly known as rubber roofing, is a versatile and durable single-ply membrane made from synthetic rubber.
  • Longevity: EPDM roofs have a lifespan of up to 30 years, making them a cost-effective option over time.
  • Weather Resistance: EPDM is highly resistant to UV radiation, ozone, and extreme weather conditions.
  • Ease of Repair: Small punctures and tears can be easily repaired, extending the roof's lifespan.

Metal Roofing
Metal roofing systems are renowned for their longevity and durability. They can be made from various metals, including steel, aluminum, copper, and zinc.
  • Longevity: Metal roofs can last between 40 to 70 years, significantly outlasting other roofing materials.
  • Energy Efficiency: Reflective metal roofing can reduce cooling costs by up to 25%.
  • Fire Resistance: Metal roofs are non-combustible, offering superior fire resistance.

 Maintenance and Repair Considerations

Commercial Roof Repair Services


At TWM Roofing, we excel in commercial leak repairs. Our owner, Tom Marshall, has been a hands-on roofer since 1978, and our estimators and project managers each have over 25 years of experience. This extensive expertise allows us to solve leak problems that often baffle others, ensuring reliable and effective repair solutions for your commercial roof.

Preventative Roof Maintenance


Maximize the serviceable life of your commercial, industrial, or municipal roof with our cost-effective preventative maintenance programs address minor repairs, clean debris, and maintain roof drainage systems. At TWM Roofing, we specialize in maintaining and extending the lifespan of commercial roofs, even those well past their prime. Our expertise ensures that repair dollars are strategically invested for the best return on investment, saving you time and money while protecting your roofing assets.

Premium Insurance


TWM Roofing Inc. carries premium workers' compensation and $5 million in general liability insurance, which exceeds the industry standard of $1 million. We also carry Errors and Omissions Insurance and Pollution Insurance (mold), which is especially relevant for commercial projects. Additionally, we maintain a $12,500 bond. Our exceptional insurance policies, reviewed annually by governmental lawyers, meet stringent municipal requirements. Our carriers maintain a minimum financial strength rating of 7. This superior coverage, while more costly, provides significant protection compared to most commercial roofing contractors.

Regular Inspections


Regular roof inspections are essential for identifying potential issues before they become major problems. Schedule bi-annual inspections to check for signs of wear, damage, or leaks.

Selecting the right commercial roofing system is crucial for the protection and efficiency of your building. Each type of roofing system offers unique benefits, and the choice depends on factors such as climate, building structure, and budget. By understanding the options available and prioritizing professional installation and maintenance, businesses can ensure their roofs provide long-lasting performance and value.
With over four decades of experience, TWM Roofing Inc. takes the time to listen to each building owner, property manager or building maintenance supervisor, identifying their specific needs based on relevant data, including budget. TWM Roofing Inc. can help you plan for both current and future roofing requirements while establishing a cost-effective maintenance plan to protect your building in the long term.

At TWM we don’t claim to be perfect, but we are 100% accountable. We shift into the “solution mode” when a problem arises, and we’ve learned that every problem is an opportunity to learn and improve TWM.

For more information or to discuss your specific commercial roofing needs, contact TWM Roofing today at (760) 731-0777 or email us at info@twmroofing.com

4+ Decades of Experience

4,500+ Satisfied Customers

3,000+ New Roofs

10,000+ Leak Repairs

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  • "I found your entire crew professional, friendly, clean, and efficient. I would recommend TWM Roofing to anyone - and do so all the time. Thanks."
    Jo Meyerhoff
    Rancho Santa Fe, CA

    When You're Happy, We're Happy

    Our past customers have had great experiences and are very happy with our work. Take a look at our testimonial page to see what they had to say! We look forward to giving you the best roof in the neighborhood.
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