Natural aeration and overhead lighting are provided by the spot skylights Ecolux Premium Alu Aération from Kingspan Light + Air. Skylight with high heat insulation, Urc = 1.3 W/m².K* : curb or straight raiser insulated by 50 mm of rock-wool. The curb/raiser, the cover plate, the frame and the leafs are thermal breaks and are lacquered in white RAL 9010.