Sustainable construction

Sustainable products and services

Sustainability standards

Sustainable products & services
Status: end 2022

Sustainability certificates in building construction

in number of projects in realisation

Sustainable neighbourhoods and urban planning

Partnership with NNBS

Sustainable added value in tenders

Developing our own projects

Portfolio analysis of development projects of the division Real Estate, Switzerland

Decarbonisation strategy of the division Real Estate, Switzerland

Implenia Real Estate: CO2 limit values for development buildings using the example of residential buildings (new buildings, Switzerland)

in kgCO2/m2a

Sustainable real estate portfolio, Ina Invest

Minimum environmental standards for materials

Building with timber


At the Lokstadt development in Winterthur, Implenia has built a wooden high-rise residential building known as “Krokodil”. With 254 apartments, this building, completed at the end of 2020, contains 7,700 cubic metres of wood.

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In April 2022, Implenia completed the residential and commercial building “KIM” which offers a total of 208 apartments. Located in Oberwinterthur, this used 5,500 cubic metres of wood.

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Implenia is currently building the new Empa campus in Dübendorf, with laboratories, offices, catering facilities and a parking garage. The new buildings are being built to Minergie-P-Eco standards, and a new type of wood-hybrid method is being used for the car park’s supporting structure.

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The “Rocket” project is another of Implenia’s own developments on the former Sulzer site in the heart of Winterthur. This 100-metre-high skyscraper is being built using a hybrid wood-and-concrete method. When completed in 2026, it will be the world’s tallest hybrid wood building.

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Innovative solutions

Hydrogen generator

On remote construction sites for roads, tunnels, bridges and other infrastructure, electricity often has to come from diesel generators. As part of a government-backed pilot project, Implenia Norway is currently working with a partner company to find a fossil-free alternative way of providing construction sites with electricity. The company TECO 2030 has developed a fuel cell generator with an output of 0.8 megawatts.

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Storing solar power with compressed air

The principle of compressed air storage has been known for some time, but until now there have been no practical systems that would allow it be used in properties. Implenia was keen to help this sustainable storage technology achieve its breakthrough, so in 2021 it entered into a partnership with Green-Y Energy, which had developed a compressed air storage system for buildings.

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Foundations for floating wind turbines

On the west coast of Norway, Implenia and WindWorks Jelsa, a wind turbine manufacturer, are establishing a joint production facility for floating wind turbines. The construction company is using its expertise to help with the demanding production of various concrete substructures for offshore wind farms.

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Durable bridges and roads

More and heavier vehicles are using the roads these days, which means that road surfaces have to be repaired at ever shorter intervals. In order to slow the degradation of road surfaces, Implenia and its partners in Switzerland are developing an ultra-high-performance fibre building material (UHFB). This is notable for its enormous longevity.

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Green asphalt

Implenia Sweden used a special asphalt for its “London Viaducts” and “Hagalund” projects, reducing the carbon dioxide emissions and energy consumption generated by laying asphalt by almost 70%. This new type of road surface contains a large proportion of recycled materials and a more environmentally friendly binder. It is also produced in a plant powered by fossil-free fuels.

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Fibre-reinforced concrete

Building materials scientists are finding more and more ways to reinforce concrete. For example, the Implenia Building Materials Laboratory took part in the “C3 – Carbon Concrete Composite” research project, which tested how bundled carbon fibres could be used to reinforce concrete instead of steel. Carbon fibre concrete is lighter than conventional steel-reinforced concrete, as well as being more tensile and corrosion-resistant.

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Climate-friendly concrete

The main ingredient of concrete is cement, which is made using a very energy and CO2 intensive process. In recent years, Implenia’s Materials Engineering Department has been developing more sustainable recipes for concrete. One of these is “b.congreen”, in which fly ash sourced from power stations replaces some of the cement. Up to 50% less greenhouse gases are produced during production.

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Facades as power generators

In Germany, Implenia Facade Technology is working with the Fraunhofer Institute for Building Physics (IBP) to develop modular facade elements that can supply buildings with energy. As well as electricity-generating photovoltaic modules, these elements include components such as micro-heat pumps, and ventilation systems with heat recovery technology.

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Innovation Hub

Supplier management