How we built Eden

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The Core building is closed until 25 May 2018 (except for school trips) while it’s refurbished for our exciting new Invisible Worlds exhibit. Thanks for bearing with us.

Designed by Jolyon Brewis of Nicholas Grimshaw and Partners, the Core is based on nature's architecture - what we call 'biomimcry'.

It incorporates a central trunk and canopy roof that shades the ground and harvests the sun. The most striking feature - the roof created from an intricate web of curved timber beams - is based on Fibonacci spirals, a pattern found in many natural forms including the seeds of a sunflower head, pine cones and snail shells.

At the centre of the Core sits Peter Randall-Page's monumental Seed sculpture based on these same natural patterns.

Sustainable construction

We worked with mechanical and electrical consultants Buro Happold to reduce the environmental impact of the building as much as possible. Innovative features include:


  • The walls are super-insulated with Warmcel, made from recycled newspapers
  • A lobby reduces heat loss through the front door
  • Underground tubes warm the air before it enters the building

Renewable energy

  • Photovoltaic panels on the roof provide electricity, although the building is mainly powered through a renewable energy tariff.

Ethically sourced materials

  • The beams are made of Forest Stewardship Council-certified Red Spruce. They're constructed using a technique known as Glulam (glue-laminated layers of timber), a strong material whose offcuts are used as a fuel.
  • The metal roof comes from a copper mine with one of the highest environmental and social standards in the world, the Bingham Canyon, owned by US-based Kennecott Utah Copper Company. We worked closely with our partners at international minerals company Rio Tinto to source the copper specially.

Recycled materials

  • The green tiles in the floor were originally Heineken bottles, the entrance mats are made from recycled truck tyres, and the cafe floor is made up of reclaimed wood.

Water saving measures

  • Automatic taps save water (by turning themselves off)

Concrete choices

Choosing the right materials actually starts with clever design. With the Core, we tried to reduce the amount of cement needed in the first place, because we know that producing cement is a carbon-intensive process. So the project team designed it out where possible; for example, removing the need for concrete support pillars.

For the cement that we did need we opted for Portland cement, because the producers were committed to the ongoing reduction of CO2 in the manufacturing process and because the cement could be delivered by rail.

We then sourced a recycled aggregate to make up the remaining 90% of the concrete (only 10% is actually cement). This was local China Clay industry waste, which came from not far away at all.

Image © Hufton+Crow