From abandoned industrial area to modern, urban district

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Thermal insulation with Jackodur XPS

Pioneering project balancing energy-efficiency with biodiversity

A former industrial site in Unna, Germany, is waking from its long slumber. After two decades of inactivity, the area is gradually transformed into a vibrant urban district. The first step is a modern office building for the Unna district job center, built by the latest energy-efficiency standards. From perimeter insulation to inverted green roof, Jackodur XPS from BEWI play a significant role in this pioneering project.

“The new five-floor office building offers a preview of the future expansion of the remaining 56 000 square meters of this district”, explains Karin Rose, managing director of Viktoria-Grundstücks GmbH & Co, the property owner. The construction of the H-shaped building, with a net floor area of 5 700 square meters, will be finalized early 2025.

 

Meeting the highest energy efficiency standards

From the outset, it was clear that energy-efficiency is a top priority, and all materials used are evaluated and selected based on their environmental footprint. The goal is to meet the KfW efficiency house 40 standard. This means that the building will require no more than 40 per cent of the energy of the standard reference building defined by the German Building Energy Act (GEG). A major contributor to the building’s energy efficiency is the thermal insulation Jackodur XPS, applied in both the perimeter and green roof areas.

 

 

 

A clear choice for an inverted green roof

“During the planning phase, we considered several roof options and were ultimately convinced by the advantages of an inverted roof”, Rose continues.

The inverted roof structure with Jackodur XPS boards allows for a flat surface, rainwater retention and excellent insulation. In addition, the high compressive strength of the boards supports heavy roof loads, such as a photovoltaic system for renewable energy.

Enhancing biodiversity and resilience

The roof design includes solar power generation and extensive green roofing, providing multiple benefits. This green space on the roof creates habitats for plants, birds, and insects, making an important contribution to biodiversity. Additionally, green roofs improve the microclimate in the new district and enhance resilience to climate challenges.

The durable Jackodur XPS insulation was also used in the perimeter area, a highly stressed part of the building. Jackodur XPS is suitable for direct soil contact and withstands high compressive loads, making it ideal for both roof and perimeter applications.

“In the coming years, this former industrial area in Unna will become a lively urban district that balances energy-efficiency and biodiversity”, Karin Rose ends
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