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Abstract
The concept of mingling photovoltaic (PV) arrays with standing-seam metal roofing (SSMR) is growing for prudent reasons. Rising energy costs, dependence on foreign oil supply, and environmental concerns about fossil fuels make “renewable” energy sources a bipartisan issue politically and, in many cases, integration of power generation into building design just makes good sense. Although the economics are not attractive enough to make the concept work on its own merit, government incentives are priming the pump (more so in some jurisdictions that others). A 30-year power source on a 40 to 50 year roof without any surface preparation couples the most sustainable roof systems available today with alternative electrical power generation. When it comes to roof types, a decision for PV power generation actually is driving roof design toward metal. Unlike built-up or membrane roofs that require replacement before the usable life of the PV array expires, a standing-seam metal roof has the life expectancy consistent with or exceeding that of PV modules. When framed PV arrays are mounted to SSMR an air plenum is created that quite possibly comprises the “ultimate cool roof,” lowering roof temperatures by as much as 15 C. Attachment is accomplished with zero penetration of the roof, preserving roof integrity; integration costs are the lowest of any roof type making this combination not only the most sustainable, but also the most cost compelling.
The concept of mingling photovoltaic (PV) arrays with standing-seam metal roofing (SSMR) is growing for prudent reasons. Rising energy costs, dependence on foreign oil supply, and environmental concerns about fossil fuels make “renewable” energy sources a bipartisan issue politically and, in many cases, integration of power generation into building design just makes good sense. Although the economics are not attractive enough to make the concept work on its own merit, government incentives are priming the pump (more so in some jurisdictions that others). A 30-year power source on a 40 to 50 year roof without any surface preparation couples the most sustainable roof systems available today with alternative electrical power generation. When it comes to roof types, a decision for PV power generation actually is driving roof design toward metal. Unlike built-up or membrane roofs that require replacement before the usable life of the PV array expires, a standing-seam metal roof has the life expectancy consistent with or exceeding that of PV modules. When framed PV arrays are mounted to SSMR an air plenum is created that quite possibly comprises the “ultimate cool roof,” lowering roof temperatures by as much as 15 C. Attachment is accomplished with zero penetration of the roof, preserving roof integrity; integration costs are the lowest of any roof type making this combination not only the most sustainable, but also the most cost compelling.
Date
4/2009
4/2009
Author(s)
Rob Haddock
Rob Haddock
Page(s)
91-100
91-100
Keyword(s)
sustainable roofing; photovoltaic; standing seam metal roof
sustainable roofing; photovoltaic; standing seam metal roof