Air Permeability & Pressure Testing

Residential / Domestic

Air permeability testing or as it is sometimes known “air tightness, air pressure or leakage testing” is carried out to confirm the actual air permeability rating of the dwelling as required by Part L1a of the Building Regulations. BEAT Solutions are registered members of iATS scheme which means all our staff are able to provide certificates which are guaranteed to be accepted by any private or local building control officer.

If you require commercial air testing on either an office, shop, retail unit, school and public building please visit our commercial air testing page.

What is an air permeability (air leakage) test? The test measures the amount of uncontrolled air movement through the building’s fabric such as cracks, gaps, holes and voids. The testing is non-destructive and usually takes up to 2 hrs to complete with the results being confirmed onsite and the reports issued same day.

Why test? Being able to identify the volume and location of uncontrolled air movement within a building, enables improvement work to problem areas and also quantify the affect on your CO2 rating. In simple terms the energy used to heat the dwelling, is being wasted,  if it is allowed to escape the building fabric. As a result the heating system has to work harder to replenish that loss of heat, costing money and unnecessary carbon. This is why within the SAP calculation the process of lowering the “design or assumed” air permeability rating helps improve the dwelling emission rate (DER) making the energy compliance easier and improving the EPC rating. Alternatively you can opt-out of air permeability testing but you will be required to use a default figure of 15.0 m³.hr.m² within the SAP calculation which means actions to compensate for the additional heat loss will be required.  This usually means increasing the floor, wall or roof insulation which is generally more expensive than the testing anyway.

How we can make it easy! We have been testing dwellings since 2006 when Part L1a first introduced the need for air permeability testing. Since then we have tested thousands of dwellings ranging from the ultra-air-tight passive house, small scale one off developments together with national housebuilders on large scale housing developments. During this time our experience and knowledge means we are the south costs leading experts of all things air tightness, involve us early in the project and we promise to help and support your designers to ensure the best possible results.

Check out our video of "A Day in the Life of a BEAT Solutions Air Tester"

Don't forget! Use our New Build Pack service to save money and hassle by combining your SAP, EPC, Air Pressure Testing, Ventilation Testing, Water Calculation and Acoustic Testing (if applicable) all together.

Why use us?

  • iATS members
  • Competitive prices
  • Discounts for multiple tests
  • Professional, reliable and on-time site staff
  • Onsite results for site staff
  • Same day certificates issued electronically
  • CSCS card holders
  • Free same day retests in the event of failure

Further Information

Air Permeability Testing - Temporary Sealing Guidance

Air Permeability Testing - Site Readiness Checklist


BEAT Solutions are proud members and approved air permeability testing engineers governed and licensed by iATS.