EPDM roofing is a type of flat or low-slope roofing made from a synthetic rubber material called ethylene propylene diene monomer (that’s what EPDM stands for). It’s known for being super durable, waterproof, and flexible, which makes it great for buildings that need strong, long-lasting roofs.
EPDM roofs usually come in large black or white sheets that are either glued, screwed down, or ballasted with stones to keep them in place. They can last 20 to 30 years (or even longer) if installed properly and maintained. Plus, it’s relatively affordable compared to other flat roofing options and easy to repair if it gets damaged.
Why Use EPDM Roofing?
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EPDM roofing is generally considered very cost-effective, especially for certain types of buildings. Here’s a breakdown:
Why EPDM is Cost-Effective:
Low Material Cost: EPDM rubber membranes are relatively inexpensive compared to other roofing materials like TPO, PVC, or traditional built-up roofs.
Easy Installation: It’s lightweight and comes in large sheets, which reduces labor costs and speeds up installation.
Long Lifespan: A properly installed EPDM roof can last 20–30 years or more with basic maintenance, which spreads out the investment over a long time.
Low Maintenance: EPDM is durable against UV rays, ozone, and weathering, meaning repairs are infrequent and often inexpensive.
Energy Savings: Black EPDM absorbs heat, which can be beneficial in colder climates to reduce heating costs. (There are also white “cool roof” EPDM options for hotter areas.)
What are the Differences Between TPO and EPDM Roofing?
| Feature | EPDM Roofing | TPO Roofing |
|---|---|---|
| Material | Synthetic rubber (black or white) | Thermoplastic polyolefin (always white or light colors) |
| Cost | $4–$8 per square foot | $5–$9 per square foot (slightly more expensive) |
| Durability | Very durable; resistant to UV, ozone, and weathering | Durable, but early TPO versions had quality issues (modern TPO is much better) |
| Lifespan | 20–30+ years with good maintenance | 15–25 years (newer TPOs aim for longer life) |
| Energy Efficiency | Black EPDM absorbs heat (good for cold climates); white versions reflect heat | Highly reflective — great for hot climates; helps lower cooling costs |
| Installation | Easier; fewer seams needed (sold in large sheets) | Requires heat-welding of seams (more labor-intensive but creates strong seams) |
| Seam Strength | Seams glued or taped; can fail over decades if not maintained | Seams heat-welded — very strong and watertight |
| Maintenance | Low, but seams and punctures need occasional checks | Low to moderate; welds rarely fail but membranes can shrink or crack over time |
| Environmental Impact | Black EPDM gets hotter, but recyclable; fewer chemical emissions | More eco-friendly; white TPO helps with building energy codes (cool roofs) |
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