Leakage Detection

Leaks in the building envelope can be detected with the help of the BlowerDoor measurement.

For leakage detection during the BlowerDoor test, we recommend high-quality infrared cameras, specially developed >anemometers<, and >foggers< suitable for use at construction sites.

The air volume flowing through a leak at depressurization is basically the product of the measured air velocity times the surface area of the leakage. In evaluating a leak, the surface area, which can vary considerably, is of particular importance: Single punctiform leaks (e.g. small perforations in sheeting caused by staples) are relatively harmless. Linear leaks (e.g. due to missing sealing tape) or flat leaks (e.g. due to missing foil sheeting), however, mean severe leakages in the building envelope. All leakages are evaluated depending not only on their size and the air-flow velocity, but also on their location. Large leaks on the top floor can lead to structural damage caused by condensation. Leakages in the lower building parts frequently cause unpleasant drafts.