Lichtkoepels

Lichtkoepels are architectural features that provide daylight to interior spaces by placing a skylight or glass dome on a roof. They are typically circular or polygonal and are set in a supporting frame made of metal, wood, or reinforced concrete. Lichtkoepels can be fixed to admit light only or operable to allow ventilation and air exchange.

The main purpose of a lichtkoepel is to illuminate interior rooms, reducing the need for artificial lighting during daytime and improving the perceived quality of space. They are commonly used above stairwells, atria, corridors, and other areas where vertical windows are limited. In addition to lighting, they can contribute to the architectural expression of a building, creating focal points and enhancing the sense of openness.

Historically, skylights and related light-domed structures have appeared in various forms in European architecture, from conservatories and public halls to industrial sheds and church interiors. Variants include lantern skylights, which sit on top of a roof or dome as a smaller, often decorative structure, and continuous glass vaults or curved glazing that follow the roofline. In modern construction, lichtkoepels can be integrated with energy-efficient glazing and shading systems to balance daylight with thermal performance and glare control.

Materials commonly used for lichtkoepels include glass panes framed in metal or timber, with contemporary versions employing laminated or tempered glass, and, in some cases, polycarbonate or acrylic panels. Design considerations cover weatherproofing, insulation, UV protection, condensation management, and safety, as well as ease of maintenance and aesthetic compatibility with the surrounding architecture.