In this article 16 sections
- TPO vs EPDM | Which Is Better?
- Side-by-Side Comparison Table
- Cost | Material and Installed Price
- Energy Efficiency in San Antonio Summers
- Durability, Seams and Hail Resistance
- Lifespan, Maintenance and Repairability
- How to Tell Whether Your Roof Is TPO or EPDM
- Which One Is Right for Your Building Type?
- FAQs | TPO vs EPDM
- Is TPO cheaper than EPDM?
- Does white EPDM perform like TPO in the heat?
- Can TPO be installed over EPDM?
- Which is easier to repair, TPO or EPDM?
- Which lasts longer in Texas, TPO or EPDM?
- How long does 60 mil TPO last?
- Get a Recommendation for Your Roof
TPO vs EPDM | Which Is Better?
Both are proven single-ply membranes with similar 20 to 30-year lifespans, so the decision comes down to heat, seams and what’s on your roof. Here’s how they compare, based on 2026 pricing and what we see on flat roofs across commercial roofing in San Antonio.
Side-by-Side Comparison Table
| TPO | EPDM | |
|---|---|---|
| What it is | Thermoplastic polyolefin sheet | Synthetic rubber sheet |
| Installed cost (San Antonio) | $5.28 – $8.16 / sq ft (60 mil) | $4.32 – $7.20 / sq ft (60 mil) |
| Thickness options | 45, 60, 80 mil | 45, 60, 90 mil |
| Seams | Heat-welded | Seam tape or adhesive |
| Color / reflectivity | White standard; reflects up to 87% of UV | Black standard; white available at extra cost |
| Expected lifespan | 20 – 30 years | 20 – 30 years |
| Repairs | Heat-welded patches; older sheets may need cleaning and primer | Adhesive or tape patches; simple to do |
| Best for | Warehouses, retail, offices in hot climates | Budget re-roofs, shaded roofs, cold climates |
Sources: Commercial Roof Guide, San Antonio (Mar 2026); Nations Roof (Feb 2026).
Cost | Material and Installed Price
EPDM usually wins on first cost by roughly $1 per sq ft in San Antonio. On a 20,000 sq ft roof, that’s about $20,000. But membrane price is only part of the bill: tear-off, insulation and flashing work cost the same either way, so the total project gap is smaller than the per-square-foot difference suggests.
| 20,000 sq ft roof (membrane system only) | TPO | EPDM |
|---|---|---|
| Installed range | $105,600 – $163,200 | $86,400 – $144,000 |
Roof area × San Antonio ranges above. Excludes tear-off and insulation.
Energy Efficiency in San Antonio Summers
With summer highs in the mid-90s, roof color matters. White TPO reflects most of the sun’s energy, keeping the roof surface and the space below cooler. Black EPDM absorbs it. White EPDM exists and narrows the gap, but it costs more and is less common in local bids. On single-story buildings with large roofs, such as warehouses and big-box retail, that difference shows up in cooling costs.
Durability, Seams and Hail Resistance
- Seams: TPO’s heat-welded seams become one continuous sheet, often stronger than the membrane itself. EPDM’s taped or glued seams are reliable when installed well, but they’re the most common failure point as the roof ages.
- Punctures and hail: Both resist hail well when thick enough and installed over a high-density cover board. EPDM’s rubber flexes under impact; TPO relies more on thickness and the board beneath it.
- Shrinkage: Older EPDM can shrink and pull at edges and flashings.
- Chemicals: Neither handles grease well. Restaurant exhaust points to PVC instead.
Lifespan, Maintenance and Repairability
Both typically last 20 to 30 years with routine care. EPDM is easier to patch in the field with tape and adhesive. TPO repairs are welded, which makes a strong repair, but very old TPO can be harder to weld and needs cleaning and primer first. Either way, twice-yearly inspections and prompt seam repairs add years. See our commercial roof maintenance programs.
How to Tell Whether Your Roof Is TPO or EPDM
| Check | TPO | EPDM |
|---|---|---|
| Color | Usually white or light gray | Usually black (white EPDM exists) |
| Feel | Smooth, slightly slick plastic | Rubbery, like an inner tube |
| Seams | Heat-welded; a smooth, fused edge | Taped or glued; you may see a tape edge or primer stain |
| Underside at an edge | Reinforcing fabric (scrim) visible | Usually no fabric |
| Records | Warranty or permit names the product | Same |
Which One Is Right for Your Building Type?
| Building | Usually better | Why |
|---|---|---|
| Warehouse & distribution center roofing | TPO | Large sunny roof; reflectivity and welded seams |
| Retail & shopping center roofing | TPO | Cooling costs; easy to phase around tenants |
| Office building roofing | TPO | Energy savings; clean white surface |
| Shaded or small roof on a tight budget | EPDM | Lowest first cost; heat matters less |
| Restaurant or food plant | Neither: choose PVC | Grease and chemical exposure |
See TPO roofing in San Antonio, EPDM rubber roofing and PVC roofing.
FAQs | TPO vs EPDM
Is TPO cheaper than EPDM?
No. EPDM is usually slightly cheaper to install, about $4.32 to $7.20 per sq ft in San Antonio versus $5.28 to $8.16 for TPO. Tear-off and insulation cost the same for both, so the gap on a full project is smaller.
Does white EPDM perform like TPO in the heat?
It reflects much better than black EPDM, but it still uses taped or glued seams. In practice, TPO is the more common and usually less expensive way to get a white, reflective flat roof in San Antonio.
Can TPO be installed over EPDM?
Yes, as a recover, if the existing roof is a single layer and the insulation underneath is dry. A separator or cover board is usually installed between them. A moisture survey should confirm the roof qualifies.
Which is easier to repair, TPO or EPDM?
EPDM is simpler to patch with tape and adhesive. TPO repairs are heat-welded, which gives a strong bond but needs the right equipment, and very old TPO may need cleaning and primer before it will weld.
Which lasts longer in Texas, TPO or EPDM?
Both typically last 20 to 30 years. In San Antonio’s heat and UV, a thicker TPO membrane (60 or 80 mil) with good maintenance is a common long-life choice, while EPDM’s lifespan depends heavily on seam condition.
How long does 60 mil TPO last?
Typically 20 to 30 years with maintenance. Thickness helps, but installation quality, seam welding and how well the roof drains matter just as much.
Get a Recommendation for Your Roof
We’ll look at your building, what’s on the roof and how long you plan to own it, then price TPO and EPDM side by side so the choice is clear.
- Free roof assessment across San Antonio, including commercial roofing in Stone Oak, Westover Hills and Alamo Ranch
- Side-by-side pricing for each membrane
- Moisture check to see if a recover is possible
Book your free roof inspection in San Antonio or see commercial roof replacement in San Antonio.
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