Välipohja

Välipohja is a Finnish term that translates to "intermediate floor" or "mezzanine floor" in English. It refers to a partial floor within a building that is constructed between two main floors, typically a ground floor and a first floor, or between any two primary levels. This construction creates an additional, smaller level within the larger volume of a room or space.

Mezzanine floors are often implemented to maximize usable space in areas with high ceilings. They can be found in various types of buildings, including residential homes, commercial spaces like shops and offices, and industrial facilities. The primary purpose is to add square footage without altering the overall height of the building or the main floor plan.

The construction of a välipohja can vary significantly. It might be a fixed, permanent structure made of concrete, wood, or steel, or it could be a more temporary or modular system, such as a prefabricated platform. Depending on its design and intended use, a mezzanine may or may not be counted as a full storey in building regulations. Access to a välipohja is typically provided by a staircase or ladder.

The term implies a floor that is not a complete, primary level but rather an added area within a larger space. This concept is useful in urban environments or older buildings where expanding the building's footprint is not feasible, allowing for efficient utilization of vertical space.