But San Jose, California-based GAF Energy thinks it has a simpler solution to the solar roof. It’s built a solar shingle, one that can be nailed down in packs much like the everyday shingles you ...

ach year, some 12 million tons of asphalt shingles, which represent the primary type of roofing in the United States, end up in landfills. Standard Industries’ GAF, whose roofs are on roughly ...