õhuvahest

õhuvahest is an Estonian term that translates to "air gap" or "air space." In construction and engineering, an õhuvahest refers to a deliberate void or space filled with air between two building elements or components. This space is often created to serve a specific functional purpose, such as insulation, ventilation, or drainage.

In building envelopes, an õhuvahest within walls, roofs, or floors can enhance thermal insulation. The trapped air acts as a poor conductor of heat, reducing heat transfer and improving energy efficiency. This can help keep buildings warmer in winter and cooler in summer.

õhuvahest can also be utilized for ventilation. In certain roof constructions, for instance, an air gap allows for the circulation of air, which helps to remove moisture and prevent condensation buildup. This is particularly important in preventing the degradation of building materials over time.

Furthermore, an õhuvahest can be incorporated for drainage purposes, especially in exterior wall systems known as rainscreen facades. In these designs, the air gap behind the cladding allows any water that penetrates the outer layer to drain away freely, preventing it from reaching the structural wall and causing damage. The presence of an õhuvahest in these contexts is a key design feature contributing to the longevity and performance of the building.