When deciding between EPDM roofing and metal roofing, homeowners often face a difficult choice. Both materials have widespread use, and each suits specific applications and budgets. However, when you weigh up flexibility, ease of installation, and overall cost-effectiveness, EPDM roofing consistently comes out on top for a wide range of low-slope and flat roofing projects. In this article, we will provide a detailed comparison of EPDM vs metal roofing, examining what each option brings to the table and why EPDM stands out against metal roofing.
Benefits of EPDM Roofing
EPDM is a type of synthetic rubber roofing widely used on both commercial and residential buildings. Its key benefits include:
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Cost-efficiency: One of the most affordable flat roofing systems.
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Ease of installation: Lightweight, with fewer seams and simple application methods (adhesive, mechanical fastening, or ballasting).
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Flexibility: Remains pliable in extreme temperatures, reducing cracking and damage.
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UV resistance: High resistance to UV rays, especially in white EPDM membranes.
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Low maintenance: Minimal upkeep required throughout its lifespan.
Benefits of Metal Roofing
Metal roofing, typically made from steel, aluminium, or zinc, is known for:
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Durability: Highly resistant to wind, hail, and fire.
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Reflectivity: Strong reflective properties, reducing cooling costs.
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Aesthetic variety: Comes in multiple finishes and profiles for a distinctive look.
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Recyclability: Environmentally friendly, often made from recycled materials.
While impressive, these benefits often come at a higher upfront cost and require more specialised installation.
EPDM vs Metal: Durability and Lifespan
Metal roofing has a longer lifespan, often reaching up to 70 years. EPDM can last 50+ years with proper installation and maintenance.
However, EPDM’s durabilitycannot be understated. It performs exceptionally in climates with fluctuating temperatures thanks to its flexibility. Metal, although durable, can suffer from denting, rust (if not coated properly), and expansion-contraction issues, which can cause fastener loosening over time.
Verdict
Metal may last longer, but EPDM's resilience and fewer repair needs often balance out the difference over time, especially for flat roofs.
Thermal Insulation and Energy Efficiency
Metal roofing reflects heat, making it a solid choice in hot climates, provided proper insulation is in place beneath the surface. However, metal is a conductor, not an insulator, and without insulation, it can transfer heat or cold into the building.
EPDM, by contrast, has exemplary natural insulating properties. Black EPDM retains heat, ideal for cooler climates, while white EPDM reflects heat, offering flexibility based on location.
Verdict
While metal roofs need more insulation layers, EPDM offers better built-in thermal performance, reducing heating and cooling costs more directly.
Installation and Application
This is where EPDM roofing shines, especially for residential / DIY applications.
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EPDM is lightweight, often rolled out in large sheets that cover significant areas with minimal seams, reducing labour and potential leak points. It can be installed over existing roofing in some cases, and the fleece-backed version performs particularly strongly in cases of uneven roofs or where the existing roof logistically cannot be stripped before reroofing.
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Metal roofing requires precision cutting, interlocking panels, and specific fasteners. It's heavier and demands more expertise, especially on complex or low-slope roofs.
Verdict
EPDM is faster, easier, and more cost-effective to install, especially for flat or low-pitch roofs.
Maintenance and Repair
Both roofing types are low-maintenance, but EPDM is much easier to repair. A patch and adhesive often suffice for punctures or minor damage. With metal, repairs often involve replacing full panels or addressing corrosion issues.
Verdict
EPDM wins on simplicity and speed of repair.
Cost Comparison
Long-term costs:
While metal has the potential to last longer, its higher initial investment, repair costs, and insulation needs can offset its cost-effectiveness. EPDM, on the other hand, offers lower upfront costs and affordable maintenance, making it a more accessible choice for many.
Which Roof Should You Choose?
If you're covering a flat or low-slope surface, are prioritising cost-efficiency and want minimal hassle during installation, EPDM roofing is a smart, practical solution. While metal roofing has its place—particularly for steep-slope or high-end architectural designs—EPDM offers better value and versatility for most commercial and residential applications.
Final Thoughts
In the debate of rubber roofing vs metal, both materials bring unique advantages. But for anyone seeking a balance of performance, cost, and ease, EPDM roofing continues to outperform expectations.
If you’re interested in learning more about EPDM, its application, or how you can improve the lifespan of your flat roof by switching, we have a range of resources available covering installation and maintenance, as well as our EPDM roofing calculator to generate the exact quote for your project.
If you're looking for a long-lasting, cost-effective, and eco-friendly flat roofing system, EPDM is the ultimate choice.
