TPO (or thermoplastic polyolefin) is a highly cost-effective material choice for flat roofs. Exploding in use all across the country since it was developed some 15 years ago, TPO combines the strengths of similar PVC and EDPM roofing options while coming in at a cheaper cost.
Why would you want it?
While most TPO roofs are a reflective white, even darker colored options have a built-in UV resistance that drastically lowers heat load on a building from the sun. This translates into much lower energy bills and helps against the heat island effect in urban areas.
It's environmentally friendly:
TPO is made of a recyclable plastic that meets the standards of both LEED and ENERGYSTAR so you can be confident that your roof doesn't just see a landfill when its reached the end of its lifespan.
TPO is more resistant to mold and mildew than other thermoplastic membranes like PVC and EDPM. It also is resistant to dirt accumulation and has a material flexibility that resists strains or cracks suffered by other materials from building movement or settling and the expansion and contraction brought by temperature changes. TPO is also puncture-resistant and stands up to high winds.
It's easy to apply:
There's no need to rip up an existing granular roof to apply a TPO membrane. It's sold in wide sheets of different millimeter thicknesses in a single ply, so there are a minimum of seams and no secondary layers to raise installation costs.