What Is Single-Ply Roofing? (Pros & Cons)

Single-ply roofing is a modern, efficient solution for commercial roofing that offers durability, design flexibility, and ease of installation. If you’re a commercial property owner or building manager, you’ve likely heard this term come up when discussing reliable and cost-effective roofing systems for your building. But what exactly is single-ply roofing, and how does it stack up against other options?

Here’s what you’ll learn in this post:

• What single-ply roofing is and how it works
• The pros and cons of single-ply roofing systems
• Why it might be the right choice for your commercial roofing needs

By the end, you’ll have a complete understanding of this popular roofing option and whether it’s a good investment for your property.

What Is Single-Ply Roofing?

Single-ply roofing refers to a wide range of roofing systems that use a single membrane layer installed over the roof deck for weatherproofing and insulation. Single-ply membranes are made from synthetic materials such as thermoplastics or rubbers and are widely recognized for their versatility, lightweight design, and durability.

Types of Single-Ply Roofing Membranes

Single-ply membranes can typically be divided into two primary categories:

1. Thermoplastic Polyolefin (TPO): TPO is a popular choice for energy-efficient and environmentally friendly roofs. It reflects UV rays, reducing cooling costs for commercial buildings.
2. Ethylene Propylene Diene Monomer (EPDM): Often referred to as “rubber roofing,” EPDM is flexible, resilient, and prized for its ability to withstand extreme temperatures. It’s particularly effective for roofs in colder climates.

Both TPO and EPDM have distinct advantages and characteristics, which we’ll explore further in the pros and cons section.

Installation Process

Single-ply roofing membranes can be applied using adhesives, fasteners, or by being ballasted (weighted down with gravel, pavers, or stones). The membrane is smoothed over the roof deck and sealed at all seams, creating a watertight barrier that protects against the elements.

Now that you know what single-ply roofing is, let’s explore whether it’s the right choice for your property.

The Pros of Single-Ply Roofing

Single-ply roofing systems offer a range of benefits for commercial buildings. From energy savings to streamlined installation, here’s why these systems are so popular:

💡 Energy Efficiency

Single-ply roofing, especially TPO membranes, is highly reflective. The membrane reflects sunlight and heat away from the roof, significantly reducing cooling costs in warmer weather. This can be a game-changer for businesses looking to improve energy savings.

✅ Design Versatility

Single-ply membranes are flexible, allowing architects and builders to incorporate them into various roof designs, including flat, low-slope, or slightly pitched roofs. Their lightweight nature also reduces stress on the roof deck compared to heavier roofing materials.

💪 Durability

Single-ply roofing systems provide excellent durability. TPO membranes resist UV damage, while EPDM membranes withstand harsh winters and extreme temperatures with ease. These qualities ensure a long lifespan, often between 20 to 30 years with proper maintenance.

👉 Quick and Easy Installation

The simplicity of single-ply membranes streamlines installation. Projects can be completed faster, saving time and reducing overall labor costs. This is particularly beneficial for commercial properties that can’t afford extended downtime.

🌲 Environmentally Friendly

TPO membranes are recyclable, and many single-ply systems are manufactured with sustainability in mind. If your building is pursuing a green certification like LEED, this can make single-ply roofing an attractive option.

While these benefits make single-ply roofing compelling, it’s worth examining the drawbacks before making your decision.

The Cons of Single-Ply Roofing

No roofing system is perfect, and single-ply roofing has its own limitations. Considering these potential drawbacks will help you make an informed choice:

Vulnerability to Punctures

Single-ply membranes are thinner than multi-ply systems, which makes them susceptible to punctures from foot traffic, falling debris, or sharp objects. Roof inspection and maintenance are essential to prevent leaks.

Seam Reliability

The seams of single-ply membranes must be carefully sealed, as poor workmanship can lead to leaks. Selecting an experienced and reputable contractor is key to avoiding this issue.

Weather Sensitivity

While some membranes are UV or cold-resistant, weather damage can still occur. High winds can stress and lift poorly secured membranes, which can compromise the roofing system.

Cost Considerations

Although the initial cost of single-ply roofing is competitive, repairs and reinforcements due to punctures or lifted seams may result in additional spending over time.

For many commercial buildings, the pros outweigh the cons—but careful assessment of your property’s specific needs is essential.

A Step-by-Step Guide to Installing Single-Ply Roofing

If you’re considering this option, here’s a quick overview of the installation process, explained in six steps:

1. Inspect the Roof Deck

Ensure the roof deck is clean, dry, and free of debris. A solid foundation is critical for a watertight seal.

2. Install Insulation

Lay insulation panels on the roof deck to improve thermal efficiency and reduce cooling costs. These panels create a flat, smooth surface for the membrane.

3. Position the Membrane

Roll out the single-ply membrane carefully to cover the roof deck without wrinkles. Precision here is crucial.

4. Secure the Membrane

Choose the right attachment method:

• Adhesives: Bond the membrane directly to the deck
  • Fasteners: Mechanically anchor the membrane at regular intervals
  • Ballast: Weight the membrane with gravel or pavers

5. Seal the Seams

Heat-weld or use specialized adhesives to seal seams tightly. This ensures the roofing system remains waterproof.

6. Inspect the Roof

Conduct a thorough check post-installation to identify and correct potential issues. This prevents leaks and extends the lifespan of your roof.

The key to a successful installation lies in pairing quality materials with skilled professionals.

Is Single-Ply Roofing Right for Your Building?

If you’re considering single-ply roofing, here are a few scenarios where it’s the perfect fit:

• Flat or Low-Slope Roofs: Single-ply systems are excellent for buildings with horizontal or slightly angled roofs.
• Energy-Conscious Properties: TPO membranes can slash cooling costs dramatically.
• Environmentally Sustainable Goals: TPO’s recyclability makes it ideal for green buildings.
• Budget-Friendly Options: Single-ply offers a cost-effective alternative to more complex roofing systems without sacrificing performance.

However, if your building requires heavy foot traffic or has unique structural needs, consult a roofing expert to determine the best solution.

Trust First American Roofing & Siding for Your Roofing Needs

At First American Roofing & Siding, we understand how important it is to have a safe, reliable, and efficient roofing system in place. Our team specializes in commercial roofing solutions, including single-ply roofing, and we pride ourselves on delivering the highest quality workmanship and materials.

When you work with us, you’ll receive:

• Expert advice tailored to your building’s needs
• Flawless installation by experienced professionals
• Ongoing support to ensure your roof lasts for decades

Take the guesswork out of choosing the perfect roofing system for your property. Contact First American Roofing & Siding today!