Domestic Air Permeability Testing has been required to new build properties since 2006 and is covered by Building Regulations 2010 Part L1. Similar to Commercial buildings the maximum permitted Air Permeability under Building Regulations is 10m²/hr.m², however building energy calculation targets (detailed within the SAP Calculation) of 5m³/hr.m² or even an onerous 3m³/hr.m² are often being specified.

BAT testing engineers are very experienced at undertaking domestic testing to a variety of dwellings (e.g. detached houses, terraced houses, apartments, mansions, etc) and have an excellent record of working with contractors to identify and rectify leakage paths, often being able to retest on the same visit at no extra cost.