Weatherization of Historic Buildings: Add Shading Devices

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.

Awnings shade the windows and storefronts of the Francis Scott Key Hotel in Frederick, Maryland, in this early 20th century view.

Planting trees can be an effective alternative to installing awnings. For south-facing elevations, select deciduous trees that provide shade in the summer and, after dropping their leaves, allow the sun to warm the building in the winter. Trees should be planted at least 10 feet from a building to avoid damage to building foundations.

Adding either awnings or shade trees may be expensive, but in hot climates, the benefits can often justify the costs.

Learn more »

• Preservation Brief 44: Use of Awnings on Historic Buildings
• Interpreting the Standards Bulletin 27: Adding Awnings to Historic Storefronts and Entrances
• Preservation Tech Note: Windows No. 7: Window Awnings

Return to first page