With thermoplastic polyolefin (TPO) and ethylene propylene diene monomer (EPDM) emerging as top choices in commercial roofing, understanding their differences is key for building owners or managers. Each material offers unique advantages, and knowing these can help you make informed decisions that affect the performance, energy efficiency, and maintenance needs of your building.
This blog post compares TPO roofing vs. EPDM, highlighting their features, benefits, and drawbacks to help you choose the best option for your needs.
What is TPO?
TPO is a popular choice for flat or low-slope roofs, especially on commercial buildings. It’s known for being bright white, which helps reflect heat from the sun, keeping buildings cooler. TPO is strong, easy to maintain, and cost-effective, making it a top pick for both new and replacement roofs.
PROS | CONS |
Energy Efficiency:Reflects sunlight, reducing cooling costs and saving on energy bills. | Potential Leaks and Seam Failures:May develop leaks and seam issues with heat and UV exposure. |
Durability and Strength:Resists mold, impacts, and punctures, lasting 30 years or more with proper care. | Professional Installation Required:Requires a professional roofer for installation, not suitable for DIY. |
Flexibility and Color Options:Flexible and available in various colors, allowing for customization. | Slippery When Wet:Can be slippery in the rain, posing maintenance risks. |
Environmental Friendliness:Often chlorine-free and fully recyclable, making it eco-friendly. | Discoloration and Loss of Reflectivity:Can attract dirt, leading to discoloration and reduced efficiency. |
What is EPDM?
EPDM is a synthetic rubber membrane. It’s durable and can withstand UV rays, ozone, and harsh weather, making it great for flat or low-slope roofs. EPDM comes in different thicknesses and can be installed in several ways, such as fully adhered, mechanically fastened, or ballasted. Its waterproof nature and easy installation make it a popular choice for those looking for long-lasting, low-maintenance roofing systems.
PROS | CONS |
Cost-Effective:Affordable with installation costs between $4 and $10 per square foot. | Susceptibility to Damage:Can be punctured by sharp objects, leading to leaks. |
Fire Resistance:Naturally fire-resistant, slowing flame spread. | Aesthetic Limitations:Usually black, which may not suit all roof designs; coatings can improve appearance. |
Durability and Longevity:Can last up to 50 years, resistant to UV rays, hail, and extreme temperatures. | Aging Issues:May shrink and become more prone to punctures over time. |
Versatility:Fits various structures and roof shapes. |
Key Differences Between EPDM vs. TPO Roofing
#1. Cost
The cost for TPO roofing materials usually ranges from $5 to $12 per square foot, whereas EPDM roofing materials are priced between $4 and $10 per square foot, with variations based on membrane thickness and installation techniques.
ROI Comparison
ROI for TPO and EPDM varies by climate. TPO excels in warm, sunny areas due to its energy-saving features. EPDM, with a lower initial cost and longer lifespan, provides better ROI in moderate climates or where energy efficiency is less crucial.
#2. Longevity
TPO roofing systems typically last between 20 to 25 years, depending on factors like climate and maintenance. In comparison, EPDM roofs can last 25 to 30 years or more, offering a longer lifespan with proper upkeep, which is ideal for those seeking long-term solutions.
#3. Durability
Given its many benefits, TPO is designed to be puncture-resistant and offers good UV resistance, making it suitable for various weather conditions. However, TPO may not perform as well in extreme weather.
On the other hand, EPDM is renowned for its durability in harsh conditions such as hail, heavy winds, and temperature fluctuations, thanks to its flexibility and robust performance.
#4. Maintenance Requirements
TPO roofs require regular inspections and cleaning to keep their reflective properties intact, as dirt and debris can reduce their energy efficiency. It’s also important to address any punctures or tears promptly to prevent further damage and maintain the roof’s performance.
In contrast, EPDM generally demands less maintenance. While routine inspections are still recommended to ensure the roof’s integrity, the material’s durability means that repairs are needed less often. This can lead to savings in both time and maintenance costs for property owners.
#5. Installation Methods
TPO membranes are usually installed with heat-welded seams, which create a strong bond between sheets. This method needs special equipment and trained workers, which can raise labor costs. TPO can also be installed by mechanically attaching or fully adhering the membrane. The heat-welding method offers a seamless, waterproof finish that helps prevent leaks.
EPDM can also be fully adhered or mechanically fastened but is often installed using the ballasted method, where the membrane is loose-laid and secured with gravel or pavers. Seams are sealed with special adhesive and tape. EPDM’s flexibility makes it generally easier to install.
However, the choice of installation method for both materials depends on factors such as roof slope, building structure, and the local climate.
#6. Energy Efficiency
Energy efficiency plays a crucial role in choosing between TPO vs EPDM roofing. TPO’s white surface reflects sunlight, significantly reducing heat absorption and lowering energy costs in warm climates. This makes TPO particularly beneficial for commercial buildings aiming to meet energy efficiency standards or achieve LEED certification.
On the other hand, EPDM’s black surface absorbs heat, which can be advantageous in colder regions where retaining heat is important during winter. Making the decision between TPO and EPDM often depends on the building’s climate and specific energy needs.
#7. Performance in Extreme Weather Conditions
TPO membranes are well-suited for hot climates due to their high resistance to temperatures and UV exposure. They also resist punctures and tears, which is beneficial in areas prone to hail or debris. However, TPO can become brittle and more prone to cracking in extremely cold temperatures.
Similarly, EPDM performs well in cold weather given its flexibility, which allows it to expand and contract with temperature changes without cracking. It is also highly resistant to hail and wind uplift, making it a reliable choice for regions with severe storms. Additionally, EPDM’s heat retention can help reduce heating costs in colder climates.
#8. Warranty Considerations
Warranties for TPO generally range from 10 to 30 years, covering material defects and sometimes labor if installed by certified contractors. EPDM warranties also last 10 to 30 years, often including extended coverage for high-quality installations, with protection against manufacturing defects and potentially weather-related damage.
#9. Aesthetic Options
Although there are other colors available for TPO, white is a popular choice due to its reflecting qualities. However, some manufacturers provide darker tints as well. While EPDM can be coated for increased energy efficiency, it is mostly offered in black. Although color options are more limited, black EPDM can complement specific architectural styles, especially in urban environments.
Final Verdict
Now you know more about why TPO and EPDM are popular roofing options. TPO is known for its energy efficiency and UV resistance, making it great for warm climates. EPDM is valued for its durability and cost-effectiveness, especially in colder regions, due to its heat-retaining properties. The best choice depends on your climate, budget, and performance needs.
Conclusion
Choosing the right roofing material is a key investment in your building’s future, influencing energy costs and long-term maintenance. Carefully consider all factors to make an informed decision that will benefit your building for decades.
To get the best EPDM and TPO roofing services, trust OConnor Contracting. Our expertise ensures durable, energy-efficient solutions tailored to your needs, offering reliable performance and excellent value. Call us at (716) 600-7663.