Grape Solar GS-1000-R-AST 1000-Watt Additional Tilt Racking System, Asphalt Shingle Required roof space: 72 square feet Configured for an array layout of 1 row by 4 columns, landscape orientation Racking configured for installation of panels in landscape orientation Hardware configured for installation on an asphalt shingle roof Built from anodized aluminum and stainless steel for superior weather protection