The purpose of the leakage test is to determine the air permeability of the building (n50 values) and to verify that it satisfies the requirements. In accordance with the applicable 2008 Technical Terms, the required tightness is:
The aim of the leak test can also detect, document and repairing leaks.
The tightness test is performed in overpressure and underpressure. There are two methods of testing: Method A - Building Survey, Method B - Building Inspection at the execution stage.
Sample table of contents:
The leakproofness test is carried out in accordance with the method described in EN 13829 " Thermal performance of buildings. Determination of air permeability of buildings. Fan pressurization method”.
Leakage testing is performed using the Blower Door Model 4 air intake door with digital readout. The measuring range is from 19 to 7 200 m3 / h. The dimensions of the adjustable door structure are: width from 60 to 101 cm, height from 121 to 238 cm.
Measurement can only be carried out when the housing designed for testing the building or part thereof is completed. It is advisable to perform an initial measurement of the air permeability of the partition, which makes it possible to remove the leak more easily after the building has been completed.
In case of product of the internal and external temperature difference (in Kalvins) and the height of the building's casing (in meters) equals more than 500 m • K, it is unlikely that a pressure difference under zero flow conditions exceeds 5 Pa. The same applies to situations in which the wind speed exceeds 6 m / s or reaches the third grade on the Beaufort scale. If the pressure difference in the zero flow condition exceeds 5 Pa, tests can not be performed.
On the leak test information provided
dr inż. Maciej Mijakowski, email@example.com