Fassadenunterlage

Fassadenunterlage refers to the material or system applied directly to the structural substrate of a building's exterior wall before the final cladding or facade finish is installed. Its primary function is to provide a protective and preparatory layer, enhancing the overall performance and longevity of the facade system.

A common type of Fassadenunterlage is a weather-resistive barrier (WRB). This material acts as a crucial defense against water penetration from the exterior, such as rain and snow, while still allowing water vapor to escape from within the building. This prevents moisture buildup within the wall cavity, which can lead to mold growth, rot, and structural damage. WRBs are typically made from materials like house wrap, asphalt-saturated felt, or specialized membranes.

Beyond moisture control, Fassadenunterlage can also contribute to thermal insulation by providing an additional layer that reduces heat transfer. Some systems incorporate rigid foam insulation boards as part of the Unterlage, which can significantly improve a building's energy efficiency. Furthermore, certain types of Fassadenunterlage are designed to create an air barrier, preventing uncontrolled air infiltration and exfiltration, which also impacts energy consumption and indoor air quality.

The specific type of Fassadenunterlage chosen depends on various factors, including the climate, the type of facade cladding, building codes, and desired performance characteristics. Proper installation of the Fassadenunterlage is critical to ensure its effectiveness and the integrity of the entire facade system.