Planting greenery is the next step in creating a bioclimatic building and the Ark is filled with it. The tall, illuminated inside space creates well-lit places to grow plants at any time of day. Enough daylight penetrates through the transparent roof to illuminate the inner rooms as well. The tiered balconies serve as social and recreational areas and the Ark has an open layout that can easily be adapted to different functions over time.
The Ark’s structural solidity is provided by compression of timber arches and tension of steel cables. The framework is covered by a special foil made of ethyltetrafluoroethylene, or ETFE. It is a strong, highly transparent foil that is self-cleaning, recyclable, and more durable, cost-efficient and lighter than glass. The foil itself is affixed to the framework by special metal profiles, which serve as solar collectors for heating water and as gutters for collecting rainwater from the roof.