Cardboard-honeycomb insulation Single-family house in Aargau, Switzerland

The house is laid out in the form of two offset volumes. The northern part is clad in natural larch boarding. The main volume has a solar façade with cardboard-honeycomb insulation, which allows a passive use of solar energy. Sunlight penetrates the outer layer of glass and heats the air in the honeycomb cells behind. With a higher temperature in this layer than inside the house, a dynamic improvement of the k-value is achieved on cold sunny days (up to 0 W/m2K). A cellulose layer improves the insulation at night and on days with low insolation. In summer, the angle of the sun is too steep for it to penetrate the honeycomb cells, so that overheating does not occur. Convection currents in the cavity also carry warm air to the top where it can escape.