What Is the Most Common Type of Commercial Roof?

Building owners face an array of options when it comes to commercial roofing systems for their properties. They play a vital role in selecting the right commercial roofing system and contractor, which impacts quality installation and long-term performance. The correct roofing choice influences energy efficiency, durability, maintenance, and even insurance costs. Partnering with a professional roofing contractor is especially important, as their expertise ensures the system is properly installed and tailored to the building’s needs. 

If you’re starting a new commercial roofing project, considering roof replacement, or managing commercial buildings, understanding the most common commercial roofing systems and their applications is essential. Let’s explore common types of commercial roofs, detail the full spectrum of commercial roofing materials, and highlight considerations for both owners and roofing contractors.

The Importance of Selecting the Right Type of Commercial Roof for Your Business

Selecting the right type of commercial roof is crucial because it directly affects the building’s protection, energy efficiency, and long-term maintenance costs. A well-chosen roofing system safeguards assets and personnel from harsh weather while optimizing operational expenses through energy savings. Additionally, the right roof material ensures durability against foot traffic and environmental stresses, reducing the risk of costly repairs and premature roof replacement.

Key reasons why selecting the right commercial roof matters include:

• Protects valuable assets, employees, and equipment from weather damage
• Supports sustainability goals through energy-efficient materials and green roofing options
• Provides durability to withstand foot traffic from mechanical contractors servicing HVAC units
• Minimizes maintenance needs and extends roof lifespan
• Ensures compatibility with the building’s structure and local climate conditions
• Helps avoid premature roof replacement and protects the investment
• Contributes to overall business operational efficiency and safety
• Facilitates compliance with building codes and insurance requirements
• Enables partnership with experienced roofing contractors for optimal installation and performance

If you’re unsure which type of commercial roof is best for your building, it’s always wise to consult with a professional roofing contractor. An expert can assess your property, consider local climate conditions, and recommend the most cost-effective and durable solution for your business. Partnering with a trusted professional ensures your investment is protected and that your roofing system delivers long-term performance and peace of mind.

The Most Common Type of Commercial Roof

Industry experts agree that single-ply membranes, which are single-layer synthetic roofing materials, are the most prevalent roofing choice for commercial buildings, especially on flat and low-slope roofs. Their popularity stems from easy installation, versatility, and benefits like durability and energy efficiency. These qualities make single-ply roofing membranes a cost-effective and reliable option among various commercial roofing systems.

The three main single ply options are:

1. TPO (Thermoplastic Polyolefin) Roofing

TPO (Thermoplastic Polyolefin) roofing is among the fastest-growing and most energy-efficient commercial roofing options. Its heat-welded seams create a highly water-resistant surface, making it ideal for large roof decks.

Furthermore, the white or light-reflective membrane promotes a cool roof surface which reduces energy bills and is beneficial for the urban heat island effect in cities, as well as being resistant to UV exposure, chemicals and high winds. TPO roofing is well-suited for new construction and re-roofing alike.

2. EPDM (Ethylene Propylene Diene Monomer) Roofing

Known simply as rubber roofing, EPDM is celebrated for its flexibility and longevity in extreme weather conditions and cold temperatures. It is resistant to ozone, hail, and thermal shock, making it a durable choice for various climates. Typically black in color, EPDM membranes are installed in large sheets to reduce seams and maintenance needs, with white options available to improve energy efficiency.

3. PVC (Polyvinyl Chloride) Roofing

PVC roofing is strong, flexible, and weldable, making it ideal for restaurants or buildings where chemical resistance is essential. PVC is a popular choice for commercial flat roofs and low-slope options. Light-colored PVC membranes are very reflective, contributing to energy efficiency in commercial properties.

Other Common Commercial Roof Types

While single-ply membranes dominate the commercial roofing market, other materials like metal roofing systems remain popular for their exceptional durability and long lifespan. It’s important to consider the differences between flat and sloped roofs, as each type offers unique benefits tailored to the building’s design and functional requirements. Choosing the right roofing system requires evaluating these factors to achieve optimal performance and longevity.

• Metal Roofing Systems. Standing seam roofing offers concealed fasteners and interlocking seams, creating durable, weather-tight roofs suitable for commercial and some residential flat roofs. Exposed fastener systems provide a more cost-effective option that is ideal for certain industrial applications, with metal roofs praised for longevity, fire resistance, and compatibility with solar panels.
• Built-Up Roofing (BUR) Systems. Built-Up Roofing involves multiple layers of bitumen and reinforcing felt, typically topped with gravel or a cap sheet, making it a durable choice for commercial flat roofs. This traditional “hot asphalt” method is especially favored in industrial buildings with high rooftop foot traffic or heavy mechanical equipment.
• Modified Bitumen Roofing. Modified Bitumen roofing combines features of BUR and single-ply systems, offering flexibility and resistance to weather fluctuations. It is well-suited for smaller flat and low-slope roofs that need durable, puncture-resistant materials to withstand environmental stresses.
• Green Roofs/Vegetative Roofing. Green roofs add layers of soil and plants above traditional roofing membranes, delivering environmental and aesthetic benefits. They help reduce energy costs, manage stormwater, and mitigate the urban heat island effect, making them popular in sustainable urban commercial projects.
• Spray Polyurethane Foam (SPF) and Roof Coatings. Spray polyurethane foam provides seamless insulation and waterproofing, which is ideal for roof replacement on older or irregular roof decks. Reflective roof coatings extend roof lifespan and improve energy efficiency by reducing heat absorption, enhancing overall commercial roof durability.

Comparing Popular Commercial Roofing Systems

Below is a quick-reference table of common commercial roofing systems, their typical lifespan, key benefits, and best use scenarios:

Roofing System	Typical Lifespan	Key Attributes	Best For
TPO Single Ply	20–30 years	Cool roof, heat-welded seams, energy efficient	Flat/low-slope, energy savings
EPDM (Ethylene Propylene Diene)	25–30 years	Synthetic rubber, flexible, cold and heat resistant	Extreme climates, retrofits
PVC Roofing	20–30 years	Chemical resistance, weldable, reflective	Restaurants, rooftops with equipment
Metal Roofing Systems	40–70+ years	Durable, low-maintenance, supports solar panels	Industrial, sustainable new builds
Built-Up Roofing	20–30 years	Multiple layers, hot asphalt, high redundancy	High foot traffic, large decks
Modified Bitumen	20–25 years	Asphalt base, flexible, cold adhesive install option	Smaller flat/low-slope roofs
Green Roofs	20+ years	Vegetative, reduces energy costs, and is eco-friendly	Urban, energy-efficient buildings
Spray Foam/Coatings	10–20 years	Restorative, seamless waterproofing	Retrofits, insulation boosts
Asphalt Shingles	15–30 years	Traditional, steep slopes, residential look	Small offices, steep slopes

Factors to Consider in Your Next Commercial Roofing Project

Choosing from the wide range of commercial roofing options involves more than selecting a material. Key factors include:

Building Use

Certain roofing materials are more resistant to heavy foot traffic and activity, whether from mechanical contractors working on the HVAC units, additional rooftop equipment or simply use of the roof for various other purposes. Selecting a material that can handle the specific demands of your building’s use helps prevent premature wear and costly repairs.

Climate and Weather

Roofing materials must be chosen with local weather patterns in mind, offering resistance to high winds, extreme weather conditions, cold temperatures, and prolonged UV exposure. A roof that is properly suited to its environment will last longer and maintain performance under stress.

Energy Efficiency

Consider roofing systems that feature cool roof technologies, reflective membranes, and compatibility with insulation or solar panels to reduce energy consumption. These energy-efficient options can significantly lower heating and cooling costs over the roof’s lifespan.

Longevity and Maintenance

Evaluate the total lifecycle costs of roofing materials, including expected lifespan and maintenance needs. Metal roofs and certain single-ply membranes often provide decades of durable, low-maintenance service, making them cost-effective choices in the long run.

Existing Roof Condition

Assess whether your current roof requires a full replacement or if restoration through roof coatings might be more feasible. Understanding the condition of the existing roof deck and membrane will help determine the most cost-effective and practical solution for your building.

Upgrade Your Commercial Roof: Contact Shain Roofing & Sheet Metal Inc.!

The most common type of commercial roof for flat or low-slope buildings is single-ply membranes such as TPO, EPDM (ethylene propylene diene), and PVC, valued for their durability, flexibility, and energy efficiency. Every building is different, and different factors influence the choice of a new roofing system, such as existing roof deck condition, weather and climate patterns, foot traffic, energy efficiency goals, and budget.

When it comes to the safety, efficiency, and longevity of your commercial property, trust the experts at Shain Roofing & Sheet Metal Inc. We pride ourselves on superior craftsmanship, transparent communication, and a strong commitment to customer satisfaction. Whether you need a new installation, replacement, or expert maintenance, we will guide you toward the best options for your property and budget.

Don’t wait—protect your investment and keep your roof performing reliably for years. Call us today to schedule your free roofing assessment!