Sprague and his girlfriend Jennifer Cornwell
Photo 1: The Jordan N. Carlos Middle School Art Building at Woodward Academy, Atlanta, features a vegetative roof system within trays elevated above the roof membrane.
Photos courtesy of Elizabeth J. Grant, Ph.D., Virginia Tech, Blacksburg
Photo 2: This filter fabric is covered with a thin layer of growth medium and plantings.
Photo 3: The vegetative roof system atop Chicago's City Hall
Intentionally inflicted mechanical damage to laminated asphalt shingles
Photos courtesy of Haag Engineering Co., Irving, Texas
A hail-caused puncture on a wood shingle
Hail-caused punctures and dents in soft slate
A hail-caused fracture along an overlay of a clay tile
An aerial view of one of the new solar roof systems at Stags' Leap Winery in Napa, Calif.
Photos courtesy of The Bright Group Inc., Napa, Calif.