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TPO vs EPDM: Why We Work Primarily With TPO

flat roof with tpo or epdm material on it
| 8-minutes Read

Choosing the right roofing material is a critical decision for building owners. Among the many options available, TPO (Thermoplastic Olefin) and EPDM (Ethylene Propylene Diene Monomer) stand out as two of the most popular choices for commercial and residential buildings alike.

In this expert guide, we’ll compare TPO and EPDM roofing materials, exploring their unique:

  • Characteristics
  • Benefits
  • Drawbacks
  • Ideal applications

By the end of this blog post, you’ll have a clear understanding of which roofing material might be the best fit for your building’s needs.

Introduction to TPO and EPDM

Before diving into the comparison, it’s essential to understand what TPO and EPDM roofing materials are and why they are commonly used.

What is TPO Roofing?

TPO, or Thermoplastic Olefin, is a single-ply roofing membrane composed of a blend of polypropylene and ethylene-propylene rubber. Developed in the 1990s, TPO has gained popularity due to its energy efficiency, durability, and cost-effectiveness.

What is EPDM Roofing?

EPDM, or Ethylene Propylene Diene Monomer, is another single-ply roofing membrane known for its exceptional durability and weather resistance. Developed in the 1960s, EPDM has been a reliable choice for commercial and industrial buildings for decades.

Key Features and Benefits

epdm roofing and tpo roofing on roof being installed

What makes each type of roofing material special? We’ve got all the details, right here!

TPO Roofing

  • Energy Efficiency: TPO roofing membranes are highly reflective, meaning they reflect a significant portion of the sun’s UV rays. This reflectivity helps reduce cooling costs during hot weather, making TPO an energy-efficient choice.
  • Durability: TPO is resistant to tears, punctures, and impact damage. It can withstand harsh weather conditions, including heavy rain, strong winds, and hail.
  • Cost-Effective: TPO is generally less expensive than other roofing materials, both in terms of material and installation costs. This makes it an attractive option for budget-conscious building owners.
  • Eco-Friendly: TPO is often considered an environmentally friendly roofing material. It is fully recyclable and can contribute to LEED (Leadership in Energy and Environmental Design) certification for green buildings.
  • Seam Strength: TPO membranes are heat-weldable, creating strong, watertight seams. This feature reduces the risk of leaks and increases the overall lifespan of the roof.

EPDM Roofing

  • Longevity: EPDM roofing membranes are known for their exceptional longevity. With proper maintenance, an EPDM roof can last 30 years or more, making it a cost-effective long-term investment.
  • Weather Resistance: EPDM is highly resistant to extreme weather conditions, including temperature fluctuations, UV radiation, and ozone exposure. It performs well in both hot and cold climates.
  • Flexibility: EPDM remains flexible, even in low temperatures. This flexibility allows it to expand and contract with temperature changes, reducing the risk of cracks and splits.
  • Ease of Installation: EPDM roofing is relatively easy to install, especially for experienced roofing contractors. It can be fully adhered, mechanically attached, or ballasted, providing versatility in installation methods.
  • Low Maintenance: EPDM roofs require minimal maintenance. Routine inspections and occasional cleaning are usually sufficient to keep the roof in good condition.

Drawbacks to Consider

Despite the myriad benefits, each roofing style has a few drawbacks to keep in mind, as well.

TPO Roofing

  • Heat Aging: TPO membranes can be susceptible to heat aging, which may lead to surface cracking and degradation over time. Regular inspections are necessary to identify and address any issues promptly.
  • Thickness Variability: The thickness of TPO membranes can vary between manufacturers and product lines. Thinner membranes may be less durable and prone to punctures.
  • Limited Track Record: While TPO has been used for a few decades, it does not have the same long track record as EPDM. Some building owners may prefer a roofing material with a more established history.
  • Installation Complexity: Proper installation of TPO requires skilled roofing contractors who are experienced with heat-welding techniques. Improper installation can lead to seam failures and leaks.

EPDM Roofing

  • Color Options: EPDM roofing membranes are typically available in black or white. While these colors are functional, they may not offer the same aesthetic appeal as other roofing materials.
  • Vulnerability to Punctures: EPDM membranes can be vulnerable to punctures from sharp objects, such as fallen branches or debris. Reinforced EPDM options are available to mitigate this risk.
  • Initial Cost: While EPDM is cost-effective in the long run, the initial material and installation costs can be higher than those of TPO. Building owners should consider their budget and long-term goals.
  • Adhesive Sensitivity: EPDM installations that use adhesives may be sensitive to temperature and humidity conditions during application. Proper curing and bonding are essential to ensure a watertight seal.

Ideal Applications

Not every roofing material is right for every style of building. When it comes to choosing between TPO vs EPDM, be sure to consider the following:

TPO Roofing

  • Commercial Buildings: TPO is an excellent choice for commercial buildings with flat or low-slope roofs. Its energy efficiency and cost-effectiveness make it popular for warehouses, retail stores, and office buildings.
  • Green Buildings: TPO’s reflectivity and recyclability make it an attractive option for environmentally conscious building owners looking to achieve LEED certification.
  • Budget-Conscious Projects: For projects with tight budgets, TPO offers a cost-effective solution without compromising on performance and durability.

EPDM Roofing

  • Industrial Facilities: EPDM’s durability and weather resistance make it ideal for industrial buildings, manufacturing plants, and warehouses exposed to harsh environmental conditions.
  • Residential Buildings: EPDM is a reliable choice for residential properties with flat or low-slope roofs. It provides long-lasting protection and minimal maintenance requirements.
  • Extreme Climates: EPDM performs exceptionally well in regions with extreme temperature fluctuations, such as areas with hot summers and cold winters. Its flexibility and weather resistance ensure reliable performance.

TPO Roofing Installation Process

Wondering what to expect when you install TPO roofing systems? Here are the steps in the process:

1) Roof Deck Preparation:

Ensure the roof deck is clean, dry, and free of debris. Repair any damaged areas before proceeding.

2) Insulation Installation:

Install insulation boards or layers to improve energy efficiency and provide a stable substrate for the TPO membrane.

3) Membrane Placement:

Roll out the TPO membrane and position it on the roof deck. Allow the membrane to relax and acclimate to the ambient temperature.

4) Seam Welding:

Use a heat-welding machine to bond the seams of the TPO membrane. Ensure proper alignment and overlap to create strong, watertight seams.

5) Edge Detailing:

Secure the edges of the TPO membrane using appropriate termination bars, flashing, and sealants. Pay attention to roof penetrations and corners.

6) Final Inspection:

Conduct a thorough inspection to ensure all seams and edges are properly sealed. Address any potential issues before completing the installation.

EPDM Roofing Installation

And for EPDM roofing systems? It goes something like this:

  • Roof Deck Preparation: Clean and repair the roof deck to ensure a smooth and even surface. Remove any debris and old roofing materials.
  • Insulation Installation: Install insulation boards or layers to enhance energy efficiency and provide a stable base for the EPDM membrane.
  • Membrane Placement: Unroll the EPDM membrane and position it on the roof deck. Allow the membrane to relax and conform to the substrate.
  • Adhesive Application: Apply adhesive to both the roof deck and the underside of the EPDM membrane. Follow the manufacturer’s guidelines for proper adhesive coverage and curing time.
  • Membrane Bonding: Carefully position the EPDM membrane onto the adhesive-coated roof deck. Use a roller to ensure proper adhesion and eliminate air bubbles.
  • Edge Detailing: Secure the edges of the EPDM membrane with termination bars, flashing, and sealants. Pay close attention to roof penetrations and transitions.
  • Final Inspection: Perform a detailed inspection to verify that all seams, edges, and details are properly sealed. Address any potential issues to ensure a watertight installation.

Why We Prefer TPO

why we prefer tpo roofing materials

At Premiere Roofing, we prefer TPO roofing for several compelling reasons. First and foremost, TPO is highly energy-efficient, reflecting solar radiation, which helps in reducing cooling costs during hot weather. This aspect not only benefits building owners economically but also contributes to environmental sustainability by lowering the urban heat island effect.

Additionally, TPO’s ease of installation and versatility make it a practical choice for a variety of building types, whether commercial, residential, or industrial. Its resistance to UV rays, chemicals, and punctures ensures a long-lasting and durable roofing solution, providing peace of mind for many years. Finally, the cost-effectiveness of TPO, combined with its superior performance, makes it a highly attractive option for budget-conscious projects.

Install The Perfect Roofing System For You

When comparing TPO vs EPDM roofing, there is no one-size-fits-all answer. The best choice for your building will depend on your specific needs, budget, and environmental considerations.

TPO roofing stands out for its energy efficiency, cost-effectiveness, and eco-friendly attributes. It’s an excellent option for commercial buildings and budget-conscious projects.

EPDM roofing, on the other hand, offers unmatched longevity, weather resistance, and flexibility. It’s a reliable choice for industrial facilities, residential properties, and regions with extreme climates.

Ultimately, both TPO and EPDM have their unique strengths and potential drawbacks. By carefully evaluating your building’s requirements and consulting with roofing professionals, you can make an informed decision that ensures the longevity and performance of your roof.Ready to take the next step?

Contact our team of experts today to discuss your roofing needs and find the perfect solution for your building!

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