Types of Single-Ply Roofing Systems

Single-ply roofing membranes are one of the most popular solutions for commercial and industrial buildings today. Known for their flexibility, durability, and cost-effectiveness, single-ply systems provide reliable protection for flat and low-slope roofs.

Below, the experts at Tri-County Commercial Roofing break down the most common types of single-ply roofing systems to help you choose the best option for your facility.

Single-ply roofing consists of flexible sheets made from synthetic polymers. These membranes are installed in a single continuous layer and are either mechanically fastened, fully adhered, or ballasted.

Single-ply roofing systems are widely used on commercial and industrial buildings because they offer:

• Strong weather resistance
• Long service life
• Lower installation weight
• Competitive cost compared to multi-layer systems

TPO (Thermoplastic Olefin) Roofing

TPO roofing is a thermoplastic membrane made from a blend of polypropylene and ethylene-propylene rubber. It combines the durability of rubber with the heat-welded seams of thermoplastics.

Pros

• A highly reflective surface reduces heat absorption and cooling costs
• Resistant to UV radiation and many chemicals
• Lightweight and easy to install
• Suitable for a wide range of commercial roof designs
• Generally more affordable than PVC

Cons

• Proper installation is critical to ensure strong seams

• Limited color options compared to other systems

EPDM (Ethylene Propylene Diene Monomer) Roofing

EPDM is a rubber-based membrane known for its flexibility, affordability, and long-term performance. It has been used successfully on commercial roofs for decades.

Pros

• Lower upfront material costs
• Highly flexible and adapts well to temperature changes
• Minimal maintenance requirements once installed
• Proven durability and long service life
• Suitable for many roof shapes and sizes

Cons

• Installation quality greatly affects performance
• Limited color options (typically black or white)
• Not ideal for roofs with heavy foot traffic without added protection

PVC (Polyvinyl Chloride) Roofing

PVC roofing membranes are thermoplastic systems known for their strength, chemical resistance, and durability. They are often used in industrial or specialized commercial environments.

Pros

• Exceptional resistance to chemicals, grease, and oils
  
• Long lifespan when properly maintained
• Highly reflective options available for energy efficiency
• Handles rooftop foot traffic better than many alternatives
• Suitable for complex roof designs 

Cons

• Higher upfront cost compared to TPO or EPDM
• Environmental concerns related to manufacturing
• Requires experienced installers for optimal performance

Each single-ply roofing membrane has advantages and trade-offs. Choosing the right system requires evaluating several key factors:

Budget

Consider both initial installation costs and long-term maintenance expenses. While some systems cost more upfront, they may provide better longevity and lower life cycle costs.

Climate

In regions like Fort Wayne and South Bend—where summers can be warm and winters cold, windy, and snowy—reflectivity and flexibility matter. TPO and PVC are excellent for reducing summer heat gain, while EPDM performs well in cold climates due to its elasticity.

 Long-Term Sustainability

Look at expected lifespan, maintenance requirements, and environmental impact. Sustainable roofing choices often reduce long-term costs and minimize waste.

 Local Building Codes and Regulations

Always ensure your selected roofing system meets local building codes and energy-efficiency requirements. Compliance ensures safety, performance, and long-term protection of your investment.