SYSTEM OVERVIEW
What is EPDM?
Ethylene Propylene Diene Monomer, commonly known as EPDM, is a durable synthetic rubber roofing membrane designed primarily for commercial buildings with flat or low-slope roofs.
EPDM roofing has been used on commercial properties for decades and is known for its flexibility, weather resistance, and straightforward maintenance. The membrane is typically installed over insulation and can be fully adhered, mechanically attached, or ballasted depending on the building and roofing system.
EPDM is most commonly available in black, although lighter-colored options may also be available. Its flexibility makes it particularly well suited for areas that experience significant temperature changes throughout the year.
Benefits & Considerations of EPDM Roof Systems
Benefits of ePDM
Proven Performance
EPDM has a long history of use in commercial roofing and is known for providing dependable protection when properly installed and maintained.
Durability
The rubber membrane is designed to withstand exposure to rain, wind, UV rays, and changing weather conditions.
Flexibility
EPDM remains flexible as temperatures change, allowing the roofing membrane to accommodate normal expansion and contraction of the roofing system.
Simple Repairs and Maintenance
Many localized problems with an EPDM roof can be repaired without replacing the entire roofing system, making ongoing maintenance relatively straightforward.
Versatile Installation
EPDM roofing can be installed using several attachment methods, allowing the roofing system to be designed around the specific needs of the building.
Long-Term Value
With proper installation, routine inspections, and timely repairs, EPDM can provide a cost-effective roofing solution for commercial property owners.
Important Considerations
- Like any commercial roofing material, EPDM performs best when the entire roofing system is properly designed and installed.
- Seams, flashing, roof edges, penetrations, drainage areas, and rooftop equipment all require careful attention. Because the membrane can also be damaged by sharp objects or excessive rooftop traffic, contractors and maintenance personnel should use care when working on the roof.
- Asscher Roofing can evaluate your property and help determine whether EPDM is the right roofing system for your building.
IDENTIFY ISSUES EARLY WITH ROUTINE MAINTENANCE
EPDM Roof Maintenance Expectations
Routine inspections and preventative maintenance can help maximize the performance of an EPDM roofing system and identify small problems before they result in more extensive damage.
An EPDM roof should be inspected periodically for issues such as:
1. Punctures, tears, or membrane damage
2. Loose or damaged flashing
3. Problems around roof penetrations
4. Seam or attachment concerns
5. Deteriorated sealants
6. Debris around drains and drainage paths
7. Areas of standing water
8. Damage caused by storms or rooftop work
Keeping drainage areas clear is especially important on low-slope commercial roofs. Building owners should also consider having the roof inspected after severe storms or whenever significant HVAC, electrical, or other work has been performed on the rooftop.
When damage is identified early, localized EPDM repairs can often restore the affected area without requiring a complete roof replacement.
Related Commercial Roofing Services
Related services include:
Commercial Roof Inspections
Identify existing damage, potential problem areas, and maintenance needs before they develop into larger issues.
EPDM Roof Repair
Address punctures, damaged membrane, flashing concerns, leaks, and other localized roofing problems.
Commercial Roof Replacement
Replace aging or failing commercial roofing with a properly designed roofing system built around the needs of your property.
Commercial Roof Maintenance
Routine inspections and preventative maintenance can help extend roof performance and identify repairs before they become more disruptive.
Storm Damage Roofing Services
Assess commercial roofs following hail, wind, and severe weather to identify visible and less obvious damage.
COMMERCIAL SYSTEMS
Roof Systems for Commercial Buildings
Check out our commercial roofing systems chart and guide tabs for a concise, practical guide to the most common commercial roofing systems. You can view what they are, how long they shine, key advantages, and what to watch out for.
| System | Lifespan | Cost | Key Advantage |
| EPDM | 20-30 Years | $ | Low cost, easy repair |
| TPO | 15-25 Years | $$ | Energy Efficiency |
| PVC | 20-30 Years | $$$ | Chemical Resistance |
| METAL | 40-70 Years | $$$$ | Longevity |
EPDM
TPO
PVC
METAL
EPDM (rUBBER)
What it is: Single-ply synthetic rubber membrane (usually black).
Pros:
Cost-effective
Excellent weather resistance
Easy repairs
Cons:
Black surface absorbs heat (higher cooling costs)
Seams rely on adhesives/tapes
Best for: Budget-conscious projects and large flat roofs.
TPO (Thermoplastic Polyolefin)
What it is: White, reflective single-ply membrane with heat-welded seams.
Pros:
Energy efficient (reflects UV)
Strong seams (heat-welded)
Resistant to mold/dirt build up
Cons:
Quality varies by manufacturer (Asscher sources the best quality TPO)
Can age faster in extreme conditions
Best for: Energy-efficient buildings in warmer climates.
PVC (Polyvinyl Chloride)
What it is: Durable single-ply membrane similar to TPO but more chemical-resistant.
Pros:
Highly resistant to chemicals, grease, and fire
Strong, long-lasting seams
Reflective and energy-efficient
Cons:
More expensive than TPO/EPDM
Can become brittle over time
Best for: Restaurants, factories, or buildings with chemical exposure.
METAL
What it is: Panels made of steel, aluminum, or other metals (often standing seam).
Pros:
Extremely long lifespan (40–70 years)
Durable against weather and fire
Low maintenance
Cons:
Higher upfront cost
Noise (rain/hail) if not insulated
Best for: Sloped commercial roofs or long-term investments.
Choosing the right commercial roofing system requires considering the building as a whole. Roof design, drainage, insulation, existing roofing materials, rooftop equipment, budget, and long-term ownership plans can all influence which system makes the most sense.
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