Williams with her daughter Anna Marie
Heilinger (center) with his son and grandchild at a dairy show
Heilinger prepares to inspect a slate roof system on a church in Marietta, Pa., in the late 1980s.
Heilinger's Allis-Chalmers collection
The Heilinger family
Heilinger and his family vacationing in Long Beach Island, N.J.
Heilinger with his wife, Jo, and their dog
The goal of a maintenance program should be to sustain a maintainable condition with the objective of maximizing a roof system's service life.
Photo courtesy of Clark Roofing Co., Broadview, Ill.
Open mortar joints will allow water to enter a roof system.