Since the ILA Berlin has made sustainability a top priority, the BDLI Chalet as a hospitality area should also comply with the sustainability concept to the maximum. From catering (regional, meat only on order...) to building materials. All building material was reintroduced into the cycle after the event. All walls, for example, consisted of stacked squared timber in the standard length. Thus, the floor plan had to adapt to the squared timber and the statics and fire protection had to be solved without treating the squared timber. The squared timber was returned to the timber trade and for the environment was - at least in the wall construction - as if nothing had happened!