Solariums

A solarium is a room designed to admit abundant sunlight, typically constructed with glass walls and a glass roof. It functions as a sunlit living space, a greenhouse for plants, or a winter garden.

Architectural solariums are often attached to a dwelling or built as stand-alone structures, oriented to maximize sun exposure. They use insulated glazing, thermal breaks, and ventilation strategies to remain comfortable year-round. Historically, solariums evolved from glass conservatories and winter gardens of the 19th century, built to house exotic plants and provide a warm retreat. Modern varieties include sunrooms, conservatories, and glasshouses, designed as year-round living spaces with heating and weatherproof framing.

In some contexts, the term solarium also refers to tanning beds or spa booths that emit ultraviolet radiation. These devices are regulated in many countries due to health risks, with age restrictions and safety warnings. From an architectural perspective, considerations include solar gain, glare, shading, daylighting, and insulation. Proper glazing choices, ventilation, and thermal mass can improve comfort and reduce energy use. The term also refers to a sun-filled extension of living space used for recreation and for housing plants.