When choosing a new roofing system, there are a lot of choices to make. There are still more choices once you’ve decided on a single-ply membrane. Both TPO and EPDM are single-ply membranes, and each has its own pros and cons. TPO, also known as Thermoplastic Polyolefin, typically comes in white, but you can choose some other color choices for your roofing surface. While it’s a newer material compared to some of the others, it currently holds a large portion of the market. EPDM stands for Ethylene Propylene Diene Terpolymer, and it’s a more tested material that’s been around for over 60 years. It typically comes in black. It’s known to be a reliable roof that’s easy to maintain. Both materials are reliable and relatively easy to install.​​​​​