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Eden Project

What are the biome panels made of?

The biome panels are glazed with ethyltetrafluoroethylene (ETFE), which is a hi-tech transparent foil that: Each polygonal panel is like a club sandwich, with three or four layers of ETFE heat-welded together. After the panels are installed, they are pumped up with dry air like big lilo pillows. Their overall thickness is about two metres, which gives better insulation than normal double glazing.

The embodied energy of the panels is also very low compared to glass.

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Practical Action - Technology challenging povertyEuropean Commission - Department for International Development

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