Choosing the Right Commercial Roof System

Why Your Commercial Roof Matters

Your commercial roof is more than just a protective layer—it’s a strategic investment in your business’s longevity, energy efficiency, and curb appeal. Whether you’re constructing a new facility or replacing an aging roof, understanding the different types of commercial roof systems is essential. Each option offers unique benefits, costs, and maintenance requirements, and the right choice depends on your building’s structure, climate, and operational needs.

In this guide, we’ll break down the most common commercial roof systems, compare their pros and cons, and help you determine which one is best suited for your business.

What Defines a Commercial Roof?

A commercial roof differs from residential roofing in scale, design, and materials. Typically flat or low-sloped, commercial roofs must withstand heavier loads, accommodate HVAC systems, and meet stricter building codes. They’re engineered for performance, durability, and cost-efficiency over large surface areas.

Key characteristics of commercial roofs include:

• Flat or low-slope design
• Larger surface area
• Specialized drainage systems
• Compatibility with rooftop equipment
• Long-term durability and energy efficiency

Types of Commercial Roof Systems

Let’s explore the most widely used commercial roof systems and what makes each one unique.

1. Built-Up Roofing (BUR)

Overview: BUR systems have been used for over a century. They consist of alternating layers of bitumen and reinforcing fabrics, topped with gravel or a reflective coating.

Pros:

• Excellent waterproofing
• Strong protection against UV rays
• Long lifespan (20–30 years)

Cons:

• Heavy weight
• Longer installation time
• Requires skilled labor

Best For: Businesses seeking a time-tested, durable solution for flat roofs.

2. Modified Bitumen Roofing

Overview: A modern evolution of BUR, modified bitumen uses asphalt-based sheets reinforced with polymers for added flexibility and strength.

Pros:

• Easy to install and repair
• Good resistance to foot traffic
• Affordable

Cons:

• Vulnerable to pooling water
• Shorter lifespan than other systems

Best For: Small to mid-sized buildings with moderate roof traffic.

3. EPDM (Ethylene Propylene Diene Monomer)

Overview: EPDM is a synthetic rubber membrane known for its durability and flexibility. It’s often installed in large, single-ply sheets.

Pros:

• Excellent weather resistance
• Lightweight and easy to install
• Cost-effective

Cons:

• Black surface absorbs heat
• Vulnerable to punctures

Best For: Warehouses, manufacturing facilities, and buildings in cooler climates.

4. TPO (Thermoplastic Polyolefin)

Overview: TPO is a single-ply membrane that combines the benefits of EPDM and PVC. It’s white, reflective, and highly energy-efficient.

Pros:

• UV-resistant and energy-saving
• Lightweight and flexible
• Resistant to mold and punctures

Cons:

• Quality varies by manufacturer
• Requires expert installation

Best For: Businesses focused on sustainability and energy savings.

5. PVC (Polyvinyl Chloride)

Overview: PVC roofing is a durable, single-ply membrane with excellent chemical resistance. It’s ideal for roofs exposed to grease or harsh substances.

Pros:

• Fire-resistant
• Strong seams and waterproofing
• Long lifespan (20+ years)

Cons:

• Higher upfront cost
• Can become brittle over time

Best For: Restaurants, chemical plants, and buildings with rooftop grease traps.

6. Metal Roofing

Overview: Metal roofs are made from steel, aluminum, or copper panels. They’re known for longevity and sleek aesthetics.

Pros:

• Extremely durable (40–70 years)
• Fire-resistant
• Recyclable and sustainable

Cons:

• Expensive installation
• Noisy during rain/hail
• Requires insulation for energy efficiency

Best For: Retail centers, office buildings, and modern commercial spaces.

7. Green Roofing Systems

Overview: Green roofs incorporate vegetation over a waterproof membrane, offering environmental and aesthetic benefits.

Pros:

• Reduces heat island effect
• Improves insulation
• Supports biodiversity

Cons:

• High maintenance
• Requires structural reinforcement

Best For: Eco-conscious businesses and urban buildings with rooftop access.

Comparing Commercial Roof Systems

Roof Type	Lifespan	Cost	Energy Efficiency	Maintenance	Best Use Case
BUR	20–30 years	$$	Moderate	Moderate	Flat roofs with heavy traffic
Modified Bitumen	15–20 years	$	Low	Low	Small commercial buildings
EPDM	20–25 years	$	Low	Low	Warehouses, industrial spaces
TPO	20–30 years	$$	High	Low	Energy-conscious businesses
PVC	20+ years	$$$	High	Low	Restaurants, chemical exposure
Metal	40–70 years	$$$	Moderate	Low	Retail, offices, modern designs
Green Roof	30+ years	$$$$	Very High	High	Urban, eco-friendly buildings

Climate Considerations for Michigan Businesses

In Michigan, commercial roofs must endure heavy snow, rain, and fluctuating temperatures. Here’s how different systems perform:

• EPDM handles cold well but may absorb heat in summer.
• TPO and PVC offer excellent UV resistance and are ideal for energy savings.
• Metal roofs shed snow easily and resist ice buildup.
• BUR and modified bitumen provide strong waterproofing but may require more maintenance in freeze-thaw cycles.

Maintenance Tips for Your Commercial Roof

Regardless of the system you choose, regular maintenance is key to maximizing your investment. Here are some tips:

• Schedule annual inspections
• Clear debris and check drainage
• Repair minor damage promptly
• Monitor for leaks and ponding water
• Keep rooftop equipment properly sealed

For a deeper dive into roof maintenance best practices, check out this guide from Owens Corning.

How to Choose the Right Commercial Roof

When selecting a commercial roof, consider:

• Budget: Upfront cost vs. long-term savings
• Building Use: Foot traffic, equipment, exposure to chemicals
• Energy Goals: Reflective surfaces vs. insulation
• Aesthetic Preferences: Visible rooflines or branding elements
• Local Codes: Compliance with Michigan building regulations

Consulting with a professional roofing contractor ensures your decision aligns with structural needs and business goals.

Ready to Upgrade Your Commercial Roof?

Choosing the right commercial roof system is a strategic decision that affects your business’s performance, safety, and bottom line. Whether you’re leaning toward TPO for energy savings or metal for longevity, On Top Roofing is here to guide you through every step—from selection to installation and maintenance.

Contact On Top Roofing today to schedule a consultation and get expert advice tailored to your business needs.