Wilmington Design Standards for Historic Districts and Landmarks

6 5 4 3 2 1 Standards for Building Changes Design Standards WILMINGTON HISTORIC DISTRICTS AND LANDMARKS 71 7 Wilmington’s Residential, Theatre, and Downtown Commercial Historic Districts have a wealth and variety of architectural metals. Wrought and cast iron fences de fi ne the property lines. Iron cresting , weathervanes and fi nials enhance the roof tops of churches and public buildings. Elaborate porches and balconies contribute to the character of many larger homes. Cast iron furniture highlights the plazas of boulevards and streets. Some commercial buildings in the Downtown District have cast iron storefronts. In Oakdale Cemetery, cast iron fences and adorn many of the gravesites. Terne metal has been a popular roo fi ng material since the mid-19th century. Copper is used on fi nials, dormers , gutters, downspouts , and in rare instances cornices , domes and other architectural features on public, commercial, and residential buildings. Modern metals such as aluminum and stainless steel are also found in the districts. The extensive use of decorative ironwork in Wilmington goes back to the 1830’s, 1850’s and increased continued after the Civil War. Most of the decorative work is cast. Cast iron is made by pouring molten iron into molds making it possible to create unlimited creative and decorative forms. Wrought iron is relatively soft, malleable, tough, and readily worked by forging, bending, and drawing. Cast iron elements are bolted or screwed together, whereas wrought iron elements are either riveted or forged. Compared with cast iron, wrought iron elements generally are simpler in form and less uniform in appearance. Suggested Repair and Maintenance Architectural metals should be inspected and maintained on a regular basis to prevent deterioration through corrosion, metal fatigue and water damage. Corrosion occurs in the form of oxidation or rusting when metals are exposed to moisture and air. Corrosion can also occur from galvanic action between two dissimilar metals. • Provide proper drainage to prevent water puddling on fl at horizontal surfaces or accumulating around decorative elements. • Clean debris from metal roofs and gutters. • Clean architectural metals when necessary to remove corrosion before repainting . • Maintain three coats of paint on all ferrous metals. • Clean soft metals such as tin, copper, terneplate, brass, and bronze with appropriate chemical methods. They may receive a protective coat of lacquer once they have been cleaned. Use hand scraping and wire brushing to clean hard metals like wrought iron , cast iron , and steel. If this is not effective, low pressure dry grit blasting may be used. Always spot check to determine if the chemical cleaner will injure the metal. • Alkyd rust-inhibitive primers are recommended for wrought iron , cast iron , and other hard metals. 3.7 Architectural Metals Architectural Metal Fence 302 South 2nd Street Source: City of Wilmington