Photo 1: Ragged edges, flaking and discoloration are telltale signs of corrosion.
Photo courtesy of the Copper Development Association.
Photo 2: St. Joseph's oratory in Montreal is an example of a long-lived copper roof in a high-acid-rain area.
Working on a busy college campus was a challenge.
Photo courtesy of Burton Construction Inc., Spokane, Wash.
A steel roof system was chosen to cover the administration building.
The administration building is designated as a landmark by the National Register of Historic Places.
Winter weather caused substantial delay while the building was being reroofed.
Much of the roof surface was covered with green steel roofing panels that resemble a copper roof patina.
Hupp, general manager of Mader Roofing Co. Inc., Oak Park, Ill.