Now the largest roofer in America is taking that one step further, by turning a solar roof into solar shingles, installed with nothing more than a nail gun, and which costs the same as rack-mounted panels.

A normal family home can be shingled with solar-celled roof material that's fireproof, waterproof, and tough enough to walk over, in just two days due to their similarity with regular shingles.

The producer of Timberline Solar Energy Shingle, GAF Energy, is owned by Standard Industries, the largest and longest-lived roofer in the country.

This familiarity with the business and access to resources allowed the company to use materials available only on a wide-scale, and avoid specialist components that are more expensive and harder to source.