Solar roof harnesses sun power to save energy costs
PowerGuard Solar Electric Roof System attaches photovoltaic modules to lightweight, interlocking polystyrene roof tiles. Delivers clean electricity, while insulating and protecting new or existing roofs and boasting near-zero operating costs. Tiles interconnect with no roof penetration, operating invisibly with existing electrical network. Roofing membrane beneath tiles protects roof from weather, leaks, and UV. radiation. System weighs less than 6 lbs. per sq. ft. to meet most roof load limits and is stable under wind speeds of up to 140 m.p.h. GSA Contract No. GS-07-0088M.