In this article 12 sections
- Which Single-Ply Membrane Is Best?
- 10-Point Comparison Table
- Best for Budget, Best for Heat, Best for Chemicals
- Attachment Methods and How They Affect Cost and Wind Performance
- Common Failure Points of Each Membrane
- FAQs | Single-Ply Membranes
- What is single-ply roofing?
- Which single-ply membrane lasts the longest?
- What thickness membrane should I choose?
- Can you mix membranes on one roof?
- Which single-ply roof is best for hail?
- Get a Membrane Recommendation
Which Single-Ply Membrane Is Best?
This page puts all three in one place so you can compare quickly. It’s the same comparison we use when scoping single-ply work for commercial roofing in San Antonio.
10-Point Comparison Table
| TPO | PVC | EPDM | |
|---|---|---|---|
| 1. Installed cost (San Antonio, 60 mil) | $5.28 – $8.16 | $6.24 – $9.60 | $4.32 – $7.20 |
| 2. Lifespan | 20 – 30 yrs | 25 – 35 yrs | 20 – 30 yrs |
| 3. Material | Thermoplastic | Thermoplastic (vinyl) | Synthetic rubber |
| 4. Seams | Heat-welded | Heat-welded | Tape or adhesive |
| 5. Standard color | White | White | Black (white optional) |
| 6. Heat performance | Excellent | Excellent | Poor in black |
| 7. Grease / chemicals | Moderate | Strong | Weak to grease |
| 8. Flexibility / impact | Good | Good | Excellent |
| 9. Thickness options | 45, 60, 80 mil | Typically 50 – 80 mil | 45, 60, 90 mil |
| 10. Repairs | Welded patches | Welded patches | Tape and adhesive patches |
Cost and lifespan: Commercial Roof Guide, San Antonio (Mar 2026). TPO/EPDM thickness: Nations Roof (Feb 2026).
Best for Budget, Best for Heat, Best for Chemicals
| Priority | Pick | Why |
|---|---|---|
| Lowest first cost | EPDM | Cheapest installed range |
| San Antonio heat and energy | TPO | White, reflective, mid-priced |
| Grease, oils, chemicals | PVC | Resists what degrades TPO and EPDM |
| Longest membrane life | PVC | Longest typical range |
| Easiest field patching | EPDM | Tape and adhesive repairs |
Attachment Methods and How They Affect Cost and Wind Performance
| Method | How it’s held down | Cost | Notes |
|---|---|---|---|
| Mechanically attached | Screws and plates through the membrane at the seams | Lower | Most common; fast; membrane can flutter in high wind |
| Fully adhered | Glued to the insulation or cover board | Higher | Smooth surface, best wind performance, quieter |
| Ballasted | Held down by stone or pavers | Lowest on suitable roofs | Needs structure for the weight; harder to find leaks |
Nationally, the same membrane can cost several dollars more per sq ft fully adhered than ballasted or mechanically attached, especially with thicker insulation. In San Antonio’s wind exposure, the attachment must meet the wind-uplift design the permit requires.
Common Failure Points of Each Membrane
- TPO: poorly welded seams, flashing at curbs and walls, punctures on thin membranes
- PVC: shrinkage and brittleness on older formulations, flashing details
- EPDM: seam tape and adhesive failure, shrinkage pulling at edges, heat aging in black sheets
Most failures on all three start at seams and flashings, not in the field of the roof. That’s where inspections should focus. See TPO roofing in San Antonio, PVC roofing and EPDM rubber roofing.
FAQs | Single-Ply Membranes
What is single-ply roofing?
Single-ply roofing is a flat-roof system that uses one layer of flexible membrane sheet (TPO, PVC or EPDM) over insulation, instead of the multiple layers used in built-up or modified bitumen roofs.
Which single-ply membrane lasts the longest?
PVC typically has the longest range at 25 to 35 years. TPO and EPDM usually last 20 to 30 years. Installation quality and maintenance affect lifespan as much as the membrane type.
What thickness membrane should I choose?
60 mil is the common commercial standard. 80 mil (or 90 mil for EPDM) adds puncture and hail resistance and often qualifies for longer warranties, which makes sense on roofs with foot traffic or in hail-prone areas.
Can you mix membranes on one roof?
Yes, for example PVC around kitchen exhaust and TPO elsewhere, but they can’t be welded together. The transition needs a dedicated detail, and warranties should be checked.
Which single-ply roof is best for hail?
Thickness and what’s underneath matter more than membrane type. An 80-mil membrane over a high-density cover board resists hail much better than a thin membrane over soft insulation.
Get a Membrane Recommendation
We’ll inspect your roof, note what’s on it and around it, and recommend the right membrane and attachment method with clear pricing.
- Free roof assessment across San Antonio, including commercial roofing in Stone Oak, Castle Hills and Westover Hills
- All three membranes priced where they make sense
Book your free roof inspection in San Antonio or see flat roofing in San Antonio.
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Questions get answered by the roofers who wrote the article, not a chatbot.