The requirements for testing components used in substructures for long-term care insurance modules have changed significantly due to new areas of application and the reduction in module costs. The combination of long-term care insurance modules and substructures is becoming increasingly important, particularly for flat roofs with different types of roofing and where little or no ballasting is required. Changes in materials, away from aluminum to sheet metal constructions, enable simplified installation using plug-in connections instead of screw connections.