What is Single-ply Roofing?

Features of Single Ply Roofing

Single-ply roofing systems have several notable features that distinguish them from asphaltic rolled roof systems or metal retrofit. Here's what makes them stand out:

Fewer Seams

Due to their broadsheets that can cover large areas per square foot, single-ply roofs typically have fewer seams than other roofing systems. This reduces the chances of leaks and maintenance costs, making them a cost-effective choice for the building owner.

Resistance to UV Rays

Single-ply roofing material, such as TPO roofing and PVC roofing, is designed to resist UV rays. They have a highly reflective surface, which keeps the roof cooler, thus reducing energy costs. This characteristic contributes to their classification as 'cool roofs' in the roofing industry.

Fire Resistant

Commercial roofing systems must prioritize safety; single-ply roofing excels in this area. These roofing materials are often fire-resistant, which is a significant advantage in the case of an emergency.

Flexibility

Single-ply roofing membranes, whether TPO membranes, PVC membranes, or EPDM roof membranes, are made from flexible sheets of synthetic rubber or thermoplastic membrane. This flexibility allows for easier installation and adaptation to various roof shapes and sizes, from flat roofs to low-slope roofs.

Durability

Despite being only one layer, the single-ply membrane is incredibly resilient. It can withstand harsh weather conditions, including extreme temperatures and heavy rainfall. If properly installed by a professional commercial roofing contractor, a single-ply roofing system can last up to 30 years.

Types of Single Ply Roofing

The single-ply roofing system category encapsulates several types of roofing. They all share the common characteristic of relying on a single layer of roofing material, but the specific material can vary. Here are the primary types of single-ply roofing:

Thermoplastic Olefin (TPO) Roofing

TPO roofing systems have gained significant traction in the commercial roofing industry in recent years. This is primarily due to their highly reflective surface, which contributes to their excellent energy efficiency, reducing cooling costs during hot seasons. TPO membranes are also highly resistant to UV rays, ozone, and chemical exposure, making them a durable choice.

Polyvinyl Chloride (PVC) Roofing

PVC roofing is another popular single-ply roofing choice. It's a versatile option that has been a mainstay in the industry for several years. PVC roofs are known for their strength and fire resistance, and they are also highly resistant to punctures, dirt accumulation, and biological growth. However, they are generally more expensive than TPO roofing.

Ethylene Propylene Diene Monomer (EPDM) Roofing

EPDM roofing, also known as rubber roofing, is a durable and cost-effective option that's easy to install. It's designed to withstand extreme weather conditions and temperature fluctuations. EPDM roofs are usually black, which helps absorb heat during winter months, but can lead to higher cooling costs in hot weather. For warmer climates, some manufacturers offer a white-on-black EPDM that reflects sunlight.

Polyisobutylene (PIB) Roofing

While not as commonly used as the previous options, PIB roofing is an option in single-ply roofing systems. It's a high-performance synthetic rubber that offers good flexibility, even in lower temperatures and has excellent resistance to UV light, ozone, and weathering.

6 Reasons Why People Choose Single-ply Roofs

Single-ply roofing systems have grown in popularity in the commercial roofing market, primarily due to their unique blend of durability, cost-effectiveness, and versatility. If you're considering various commercial roofing systems, here are six reasons why people often choose single-ply roofs:

Reason 1: Durability and Longevity

One of the most compelling reasons why people choose single-ply roofs is their durability. These roofs are designed to withstand the elements, providing excellent resistance to UV radiation, chemical exposure, and extreme weather conditions. Additionally, with proper installation and maintenance, a single-ply roof can last up to 30 years, making it a long-term investment for your property.

Reason 2: Energy Efficiency

The energy efficiency of single-ply roofing is another attractive feature for many building owners. Thanks to their highly reflective surfaces, particularly with TPO and PVC roofs, they reflect solar radiation rather than absorbing it, reducing the heat gain in the building. This helps to lower cooling costs during hot weather, contributing to overall energy savings.

Reason 3: Flexibility in Installation

Single-ply roofs can be installed using different methods, such as fully adhered, mechanically fastened, or ballasted. They can also conform to various roof shapes and designs, which offers installation flexibility. Moreover, their lightweight nature reduces the load on the building structure, facilitating installation on various buildings.

Reason 4: Cost-effectiveness

While the initial cost of a single-ply roof can be higher than some traditional roofing systems, the long-term cost-effectiveness is a significant selling point. These roofs' durability and low maintenance requirements mean fewer repair costs over time. Additionally, the energy efficiency of single-ply roofs can contribute to significant savings on energy bills.

Reason 5: Environmentally Friendly

Many single-ply roofing systems, like TPO and PVC, are recyclable at the end of their life, making them a greener choice compared to other roofing materials. Their energy efficiency also contributes to reducing the building's carbon footprint.

Reason 6: Fire Resistance

Safety is paramount in any building; single-ply roofing systems offer excellent fire resistance. These materials are designed to slow the spread of flames, providing additional protection for the building and its occupants. This can be especially important in regions with a high risk of wildfires or for buildings that house catch fires easily.

How to Choose the Best Single Ply Membrane Roof Material

Choosing a single-ply roofing membrane for your commercial building is a significant decision. Here are some key factors to consider to ensure you make the best choice:

Building Characteristics

First, consider the physical attributes of your building. The size, shape, and slope of your roof will influence the type of single-ply roofing system that's most suitable. For instance, certain types of single-ply roofing are better suited to flat or low-slope roofs. If your building has a lot of rooftop equipment or foot traffic, you may want to choose a more durable material like PVC.

Climate and Environmental Conditions

The climate in your area is another critical factor. Some single-ply materials, like EPDM, are excellent for cold climates, while others, like TPO and PVC, offer superior heat reflection suitable for warmer climates. Due to its wind uplift resistance, a mechanically attached system may be the best choice in areas prone to high winds or heavy rain.

Budget

Cost is always a consideration. While single-ply roofing systems can be more expensive initially than other roofing options, they often prove more cost-effective in the long run due to lower maintenance costs and energy savings. Ensure to factor in both the upfront and ongoing costs when budgeting.

Professional Advice

Lastly, consult with a professional commercial roofing contractor. They can evaluate your specific needs and guide the best single-ply roofing system for your building. They can also provide information about warranties and expected lifespan, giving you peace of mind about your investment.

Conclusion

In summary, single-ply membranes have found their niche in the commercial roofing market due to their durability, flexibility, and cost-effective properties. However, you can only benefit from a reputable roofer. We recommend working with Equity Roofs on your next project, as the company delivers the highest quality work.

Read also our blog on What Does EPDM Stand for in Roofing?.