Abstract: A facade system with a translucent porous insulating material of mineral or organic fibers for passive solar energy utilization is provided. The insulating material has on the outside a colored layer for design purposes and for controlling the light transmittance. The facade system is formed from a multiplicity of preferably factory-prefabricated facade insulating boards. The colored layer can, moreover, be designed in such a way that it protrudes beyond the insulating layer along two board edges. Consequently, when the facade insulating boards are applied to the building wall, the abutting edges in the region of the joins between neighboring insulating boards are covered by the overlapping protruding colored layer.