What does air leakage look like in a building?
Most commonly, you may experience these effects of air leakage rather than seeing them. Uncontrolled air leakage can lead to:
- Energy Loss and Higher Costs
- Decrease in Environmental Control
- Increase in Moisture Laden Air = Potential Damage
- Increase in Noise
Identifying Air Leakage
Here are some tests we use to identify air leakage.
ASTM E1827: Standard test method for determining building air tightness using an orifice blower door
ASTM E1186: Standard Practices for Air Leakage Site Detection in Building Envelopes and Air Barrier Systems
4.2.1 Air Infiltration Site Detection Using Infrared Scanning
4.2.2 Smoke Tracers Used in Whole Building Pressurization or Depressurization
4.2.6 Smoke Tracers Used in Chamber Pressurization or Depressurization
4.2.7 Detection Liquid Air Testing
The photos below show the detection of air leakage by using smoke tracers.
No Air Leakage
Whole Building Air Barrier Test
In order to ensure the building envelope is meeting performance requirements, whole building air barrier testing may be conducted. Air barrier testing can identify leakage and the airflow paths, which illustrate the potential amount of energy lost.
Standard test ASTM E779, is conducted using orifice blower door fans that induce a series of positive and negative pressures on the building envelope.
We do not want the tested air leakage to exceed 0.40 cfm/ft2 at 75 pa. If the air leakage exceeds the limit, we conduct:
Visual Inspection of air barrier
Seal leaks where practicable
Additional report outlining corrective action