Dow Chemical has developed a roof shingle that contains thin-film solar power cells and can be integrated into asphalt roofs, which are used in 90 percent of American homes.
Dow executives said the solar shingles can be handled like a regular asphalt shingle and can be nailed right onto a roof and walked on by roofers.
The company will begin test-marketing the shingles in mid-2010 and the company will initially target new home construction.