EPDM roofing, short for Ethylene Propylene Diene Monomer roofing, is a versatile rubber roofing option that stands out for its durability and low maintenance requirements. Commonly recognized as one of the best materials for flat roofs, EPDM is particularly favored in industrial and commercial applications due to its remarkable ability to withstand extreme weather conditions. Its tear-resistant nature and good insulation properties contribute to its long lifespan, making it a reliable choice for building owners looking for a long-term roofing solution.
What Does EPDM Roofing Stand For?
EPDM is an abbreviation for Ethylene Propylene Diene Monomer. This synthetic rubber is primarily composed of two ingredients: ethylene and propylene. The EPDM rubber membrane is widely used in roofing applications due to its numerous advantages, including flexibility, durability, and excellent resistance to UV radiation and ozone. These properties make EPDM an excellent choice for various roofing projects, particularly those requiring a robust and weather-resistant solution.
What Is EPDM Roofing Made Of?
EPDM roofing consists of four distinct layers, enhancing its durability and longevity as a roof membrane.
- Top FlexWhite (optional)
- FRM EPDM Layer
- AFR EPDM Layer
- Bottom EPDM Layer
How Long Has EPDM Roofing Been Around?
EPDM roofing has a rich history, having been developed by DuPont in the 1950s. It was first utilized as a roofing membrane in the early 1960s, addressing the rising demand for durable roofing solutions that natural rubber could not meet. Its popularity surged during the 1970s and 1980s, partly due to the oil embargo in the Middle East, which inflated the prices of asphalt-based roofs and reduced the quality of available materials. EPDM quickly gained a reputation for being cost-effective and easy to install, alongside its impressive weather-resistant properties attributed to its cross-linked makeup and UV resistance.
What Goes Under EPDM Roofing System?
The EPDM roofing system is structured with several essential layers that contribute to its overall performance. These layers include:
- Roof Decking
- Insulation
- Vapour Barrier
- Cover Board
- Adhesive Layer
- Separation Layer (Optional)
What Colors Does EPDM Roofing Come In?
The most commonly used colors for EPDM roofing systems are black and white. While these are the standard options, EPDM membranes can also be coated with acrylic paints or other coatings in various colors, although this is less common and typically done for aesthetic purposes. It’s important to note that altering the membrane’s color with coatings may impact the roofing system’s performance or warranty, so careful consideration is required.
How Thick Is EPDM Roofing?
EPDM roofing membranes come in various thicknesses, including 45 mils, 60 mils, 75 mils, and 90 mils, comparable to the thickness of a trash bag. The sheets can range in width from 5 to 50 feet and can be as long as 200 feet. While thicker rubber membranes may cost more and present challenges in sealing, they offer enhanced durability and resistance to damage.
What Is The Life Expectancy Of An EPDM Roof?
EPDM roofing systems have a lifespan of at least 20 years, but with proper maintenance and care, they can last up to 60 years. Adhering to recommended maintenance schedules throughout the roof’s lifecycle is essential to achieving this longevity.
Is EPDM Roofing Hail Resistant?
EPDM roofing membranes are known for their excellent resistance to hail damage and their ability to keep water out of buildings. Thicker membranes provide even greater resistance to hail impacts. Unlike many other roofing materials, EPDM remains flexible in colder temperatures, which is crucial during hailstorms, reducing the likelihood of cracks or punctures.
How Much Does EPDM Roofing Cost?
The cost of EPDM roofing materials can range from $3 to $12 per square foot, with the average price typically between $4 and $6.50. Installation costs add an additional $1.50 to $3 per square foot. For a 1,500-square-foot roof, the total cost can range from $8,000 to $22,000, depending on the specific materials and labor involved.
EPDM Vs. Other Single-Ply Roof Membranes
TPO Roofing Membrane
When comparing EPDM to TPO (Thermoplastic Olefin) roofing membranes, TPO exhibits a higher resistance to punctures and boasts seam strength that is nearly four times greater than that of EPDM’s adhered or taped seams. However, EPDM membranes generally have a longer lifespan compared to TPO. In recent years, TPO has become the most widely used single-ply roofing material in the U.S., largely due to building codes favoring cool-roof requirements. TPO’s superior reflectivity and UV resistance make it an ideal choice for warmer climates. In contrast, EPDM’s black surfaces retain more heat, helping to lower heating costs in colder regions.
PVC Roofing Membrane
PVC (Polyvinyl Chloride) roofing membranes are another alternative, known for their energy efficiency and high resistance to punctures, chemicals, and fire. PVC roofs have a reflective white surface that aids in reducing cooling costs by reflecting sunlight. The heat-welded installation method of PVC results in excellent seam strength and a watertight seal. Conversely, EPDM is a more flexible synthetic rubber that excels in colder climates, where its heat-absorbing qualities can improve heating efficiency. Although PVC membranes tend to offer greater puncture and chemical resistance, EPDM is often more affordable and simpler to install. The choice between PVC and EPDM ultimately depends on factors such as climate, environmental exposure, and budget.