PEB Knowledge – Part 6: Why Do Warehouse Roofs Leak? Warehouse roof leaks are not always caused by heavy rain or aging roofing materials. In many cases, leakage can be traced back to design details, installation, drainage, maintenance, or the way different building components work together. For warehouse owners and project teams, understanding the causes of roof leakage is important. A small leak may seem like a minor issue, but over time, water intrusion can damage insulation, equipment, stored goods, structural components,