AT&T painted two Nevada telecom roofs white; roof surfaces cooled 35–40°F, reached 12°F below outdoor air, and two buildings saved about 0.5 kWh of electricity a day

A study explored how white roofs reduced energy costs for AT&T communication buildings. Researchers observed significant roof surface temperature drops after applying white ceramic coating. Electricity savings were modest for most buildings, but payback was immediate. This experiment highlights the broader impact of reflective roofs on urban heat islands. Cool roofs offer a simple, cost-effective sustainability solution for many structures.