In the traditional Kerala style of architecture, most Kochi flat were built around a central courtyard that served to bring natural light and fresh air to the interiors. Conventional wisdom has always highlighted the benefits of natural lighting in a building.

Nobody would dispute the belief that natural light lifts spirits, makes spaces appear larger and reveals the world in its true colours. Beyond the aesthetic appeal, it also reduces eyestrain, increases productivity and lessens electrical demand.

Unfortunately, today's buildings rarely have enough natural lighting. For years, designers and builders believed that it was the inevitable consequence of the trend to build compact houses. How do you manage to have a central courtyard in a house measuring hardly 1,000 sq.feet area? Why have an opening to the sky when large windows would serve the purpose as well?

Thanks to a new breed of architects willing to experiment with designs and materials, the concept of natural lighting is making a come back. The simplest method is to capture sunlight on the rooftop and diffuse it through the interiors to bring dark spaces to life. The skylight or roof-light has emerged as the most popular natural lighting system for any building, commercial or residential, big or small, simple or opulent.

The skylight is designed on the basic theme that a window on the roof lets in significantly more light than a vertical window. So even a small skylight can make a room feel larger and more airy.

The skylight opening is first given a mild steel frame and welded in place to suit the desired shape like curved dome, flat surface or gable. The polycarb sheet is fixed to the frame with corrosion- resistant aluminium sections on top. For waterproofing, the underside of the frame is sealed with a gasket or silicone sealant.