Kalkkisaunas

Kalkkisaunas, often translated as lime saunas or limed saunas, are traditional Finnish bathing structures distinguished by their interior walls coated in lime plaster. This coating serves both aesthetic and practical purposes. Historically, lime plaster was readily available and offered a natural, breathable finish. The white hue of the lime created a bright and airy atmosphere within the sauna, contributing to a sense of cleanliness and purity.

The application of lime plaster also has functional benefits. Lime is naturally antimicrobial, helping to inhibit the growth of mold and bacteria in the humid sauna environment. This property contributed to the hygiene of the bathing space. Furthermore, lime plaster is hygroscopic, meaning it can absorb and release moisture, which can help regulate the humidity levels within the sauna. Over time, the lime coating might develop a unique patina, reflecting the history of the sauna's use. While modern saunas often feature wood paneling, kalkkisaunas represent an older tradition that prioritizes natural materials and their inherent properties for a distinct bathing experience.