Air Tightness Testing Services
We conduct Air Tightness testing throughout the Midlands and are able to provide air testing throughout the UK on request, providing a fast and reliable service.
What Is Air Tightness Testing?
Since 2006, Air Tightness testing has been required to comply with Part L1A & L2A of the Building Regulations for Domestic and Commercial new builds. Air testing measures the amount of uncontrolled leakage from gaps and cracks in the building envelope using a specialised fan to depressurise (or pressurise) the dwelling.
In terms of air test requirements, building regulations have a maximum air permeability value of 10 m3.h/m2. However, each new build has a designated air permeability target, this can range from 1-10 and is usually assigned at the start of your project by your SAP assessor.
We test your dwelling to meet this initial target set by your SAP assessor. If your dwelling meets the target score, building control can approve both your air permeability score and your SAP calculations based on review.
A sample test may be possible when you have multiple houses of the same build type and size. This sampling method, however, forces you to apply a 2 m3.h/m2 penalty to all houses not tested. Making it crucial for a higher build specification of the dwellings to meet air test requirements.
From our experience, air testing is often more cost-effective when all houses are tested individually. This means that you are able to avoid penalties being applied to each new build.