Impenetrable infiltration by 3TU.Bouw
As part of the research to airtightness a dwelling that is being built is measured with a blower-door-test. Normally such a test is done when a dwelling is finished and furnished. In this case the test was done before. The results of the test can be used to improve the infiltration of the building.
This video can also be found on the website of 3TU.Bouw: http://www.3tu.nl/be/en/