They are lightweight and are excellent for a re-roof. There are many types of single ply products, most of them designated by the initials of their principal chemical compound. Most single ply roofs are cool roofs, reflecting the sun's heat and conserving energy.
- TPO is a Thermoplastic polyolefin compound. the additional thickness offers additional protection against rooftop traffic and migratory debris.
- PVC, a flexible version of poly-vinyl-chloride with it's advanced polymer compounds and UV technology provide resistance to ozone, organic growth and abrasion.
- EPDM, ethylene-propylene-die ne-monomer. Some EPDM benefits include membrane fatigue resistance, hail resistance, high resistance to ozone, weathering and abrasion, flexibility in low temperatures, superior resistance to extreme heat and fire, thermal shock durability.