Air Pressure Testing

Air pressure testing calculates the air tightness of a building, known as its ‘air permeability’ or ‘leakage’ rate. Air leakage is air that escapes the building via uncontrolled means. Leakage can occur through gaps, holes or cracks in the fabric of the building. Excessive air leakage can affect the building’s energy efficiency, making the building less energy efficient and more expensive to run.

Part L1A and L2A (England & Wales), Section 6 (Scotland) or Part F1 (Northern Ireland) of The Building Regulations require Air Pressure Testing. Air Pressure Testing has been mandatory for new build residential and commercial properties in England, Wales and Northern Ireland since 2006, and in Scotland since 2010. This is to make sure the building meets or exceeds the air permeability rating specified in your design stage SAP or SBEM Calculations. Maintaining a high level of air tightness within a building contributes to high quality energy efficiency.

Failing to maintain air tightness can result in up to 40% heat loss. If you’re investing in energy efficiency measures, such as a new boiler or extra insulation, your efforts could be in vain if the building’s air tightness isn’t adequate.