Detailed drawing of roof mounted solar panels including fixing brackets, rails, rafter, tile battens, roof felt, and roof tiles/slates. Construction drawing of roof photovol ystems are the backbone of rooftop solar installations. They are the critical components that secure solar panels to roofs,ensuring stability and performance while withstanding environmental stressors. DWG format available upon request. Cleaning the roof debris, use a measuring tape to measure the installation position of the foundation on the roof, and place the foundation; Use a percussion drill to drill holes in the cement foundation. Should you need more symbols, you can create them in the symbol editor.