On concrete flat roofs, distributed rooftop solar arrays often use precast concrete ballast blocks instead of roof penetrations. These blocks resist wind through gravity: their dead weight creates a restoring moment against uplift and sliding forces acting on the modules and rails. Wind performance

Cement roof solar mounting systems, often referred to as ballasted racking, are critical for installing photovoltaic (PV) arrays on flat commercial or residential buildings without penetrating the roof surface. Understanding the core components ensures structural stability and long-term efficiency.