Certainteed Corporation

Robin M Duarte

Christopher C Fisher

Robert L Jenkins

The present disclosure relates particularly to photovoltaic roofing systems for use in photovoltaically generating electrical energy, specifically, the use of bottom flashings in such systems. Methods for installing such systems and replacing non-photovoltaic roofing elements in such systems are also described.

Photovoltaic roofing systems with bottom flashings

The present invention relates more particularly to improved flashings for use in integrating specialized roof-mounted structures, such as photovoltaic devices for the generation of electrical energy, with conventional roofing materials on a roof. In one aspect, the invention provides a flashing element having a cross-sectional shape comprising a laterally-extending flange, the flange having an edge, a first end and a second end, the side flashing element comprising a return hem disposed at the edge and comprising a folded-over strip of material disposed over the top surface of the flange at the edge, the return hem having a first end disposed toward the first end of the edge, and a second end disposed toward the second end of the edge, wherein the total thickness of the return hem at its second end is no greater than the interior thickness of the return hem at its first end.

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Newcastle, CA, United States of America

Robin M Duarte