Shenandoah, Pa., was once a bustling mining town in the eastern mountain valleys of Pennsylvania, but when the coal industry began to decline after World War II, many residents left

Retrofitting flat roofs with sloped metal roofs is a concept that is tailor-made for these declining economic times. Interestingly, of the 40 billion square feet of roofing annually installed in the United States, only a fraction of that amount entails retrofitting roofs with sloped metal systems.