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Building with Vinyl to Conserve Energy

Light-colored roofs made of vinyl are an extremely popular, cost
effective, energy-saving alternative to traditional dark-colored roofs
on commercial buildings.

How it works:

On a 90° F day, the temperature on a black roof can be as high as
160° F, according to The Heat Island Group at the University of
California, Berkeley. Some of that heat is transferred inside to the
occupants of the building, resulting in higher utility costs for air
conditioning to keep the occupants comfortable.

But what about the heat gain in northern climates in winter? That is a
benefit.