skylit

Skylit is an architectural term used to describe spaces that are illuminated primarily by skylights—windows set into the roof or ceiling to admit natural daylight. The adjective skylit is often used to describe rooms, corridors, or atria where daylight comes from above rather than through vertical windows, shaping light distribution, mood, and perceived spatial height.

Skylights come in several varieties. Fixed skylights provide natural light without ventilation, while operable or vented skylights add airflow. Tubular skylights channel daylight through a small roof aperture via a reflective tube, suitable for narrow spaces. Larger forms include lantern skylights and roof lanterns, which can add architectural emphasis and more daylight. Materials range from glass to acrylic or polycarbonate, with frames in aluminum, wood, or uPVC. Proper installation requires flashing and sealing to prevent leaks, and performance is influenced by daylighting factors such as U-value, solar heat gain coefficient, glare control, and shading options.

Advantages of skylit spaces include increased natural light, potential energy savings from reduced artificial lighting, and enhanced spatial qualities. Drawbacks can include glare, uneven light distribution, heat gain in warm climates, condensation, and higher upfront costs. Designers typically balance climate, roof type, and usage with local building codes and energy standards to optimize daylight while maintaining comfort and durability.