HistoriCorps workers Ethan Raath (on scaffold) and Cathy Cooke seal a window lintel at the Mark Twain National Forest Ranger Station in Houston. Credit: DOUG DAVISON | HOUSTON HERALD

As buildings around the United States that are listed on the National Register of Historic Places age, the elderly materials they’re made of at times require attention.

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Doug Davison is a writer, photographer and newsroom assistant for the Houston Herald. Contact him by phone at 417-967-2000 or by email at ddavison@houstonherald.com.