Photo gallery

W. Douglas "Doug" Fields, principal and senior vice president of Certified Roofing Systems & Contracting Corp., Bladensburg, Md., with his wife, Laurel.

Photo courtesy of the National Institute of Safety and Health.

Any employee involved in installing the roof system in NIOSH's study, whether involved in cutting tiles or not, had the potential for overexposure to respirable silica and noise.

Photo courtesy of the National Institute of Safety and Health.

Exposures from cutting cement roof tiles can exceed OSHA's PEL.

Photo courtesy of the National Institute of Safety and Health.

Aerial view of Southern California Edison, Rosemead, Calif., headquarters

Photo courtesy of Cabral Roofing & Waterproofing Corp., Montebello, Calif.

Application of the aggregate surfacing

Photo courtesy of Cabral Roofing & Waterproofing Corp., Montebello, Calif.

The new lightweight insulating tapered concrete deck

Photo courtesy of Cabral Roofing & Waterproofing Corp., Montebello, Calif.

The finished BUR system

Photo courtesy of Cabral Roofing & Waterproofing Corp., Montebello, Calif.

Christina E. Erbsen