Roofing Works: Insulation, EPDM Waterproofing, Retention Roof & Green Roof

This tender in Lower Saxony, Germany, covers a comprehensive roofing project. The primary work involves installing a vapor barrier (610 m²), insulation (2600 m² including gradient and stepped insulation), and EPDM waterproofing (2600 m²) on a concrete substrate. The project also includes the creation of a retention roof system (2600 m²) and a green roof (2080 m²). Furthermore, it encompasses the installation of approximately 34 PV mounting systems, 8 small (100x100 cm) and 13 larger (150x150 cm) flat roof windows, and complete roof drainage and cable safety systems.

The size of the roof (2600 m²) and the integration of multiple systems (retention, green, PV, skylights, safety) suggest a medium-scale and moderately complex project. Contractors should possess experience in installing these combined systems. The tender's requirements for safety systems indicate a need for compliance with German safety regulations for rooftop access and maintenance.

The deadline for submissions is May 12, 2026, allowing approximately six weeks for bid preparation. The absence of a published value requires a thorough cost analysis to determine profitability and competitive pricing.