Historically, awnings and trees provided shade to keep buildings cooler in the summer. Existing awnings and trees should be kept in good condition to take advantage of their energy-saving contribution.
Building owners may consider adding awnings or trees if the summer cooling load is substantial. Awnings are appropriate where there is evidence that they existed historically and on building types where they were common historically, such as commercial buildings with storefronts. Awnings should be installed with care to avoid damaging the building or visually impairing its architectural character. Select an awning style that is compatible with the historic building.
Source: U.S. Department of the Interior, National Park Service