Panel-layer system for thermal insulation of the shaded surface

A layered panel system for thermal insulation of a shaded surface, comprising:

• a support structure mounted to an external surface of a building partition, the support structure comprising at least two rigid and non-deformable rails;
• and
• a plurality of slats or panel units permanently affixed to said rails in a layered, inclined configuration relative to the external surface;
• wherein the inclination angle of each of the slats is fixed, and the angles decrease progressively from a topmost of the slats to a bottommost of the slats according to a predefined gradient;
• wherein a ventilated air cavity is formed between the slats and the external surface,
• the support structure being spaced from the external surface by a distance between 10 mm and 100 mm;
• and
• wherein each of the slats includes an edge with an irregular shape and comprises at least one surface covered with a light-transmitting, solar-reflective or solar-protective film having transmission between 20% and 90%.