In the company we took over the project for implementation of a new multipurpose sporsts tent in Sport park Domžale. In accordance with the new regulations on efficient energy use all sports buildings warming above 13° must have regulated building physics, which dictates the U envelope of 0.15 W/m2K. We replaced the canvas facade with high-insulated and polycarbonate light panels, which allow natural and diffused, soft light coming into the space. Investment costs total 1.579.242,13 Eur.