Get a Quote

Air Leakage or Air Tightness Testing

With tighter regulations pushing down the heat demand of new buildings, you’re likely to require an air leakage test for your new building. We know the pressure on site so let us work with you for your Commercial Air Leakage Testing dates.

Commercial Air Leakage Testing - At what stage(s) does this apply during your build?

What is Air Leakage Testing?

Also known as an Air Permeability Test or Air Tightness Test, Air Leakage Testing is a measurement that shows how good your building is at keeping the heat in, and the cold out. It is a requirement on new developments as part of Approved Document Part L (England and Wales) and Technical Handbook Section 6 (Scotland).

The test takes place after construction and before the occupants move in.

The lower the air leakage, the better the building is at keeping out the cold, therefore reducing fuel bills. However, a building that is too air-tight can be at risk of condensation and mould growth so a balance needs to be met.

If the unit has a floor area less than 500sqm, and providing it shows compliance with the Target Emission Rate by using a worst-case result, you can opt to not test. In all other cases, an air test is almost certainly mandatory.

Top Tips for Air Leakage Testing

  • Common areas for poor test results include: service penetration points, pipework, joints between panels, skirting boards, data cabling, plant rooms, MVHR systems.

  • Get early design advice on your building's Airtight Barrier Line.

  • Building services and cladding are key causes of an air test failure.

The Energist Approach

  • Our dedicated team of ATTMA accredited Air Leakage Testers will help you achieve the best result.

  • We understand your deadlines and will send your certificates through within 24 hours.

  • We will check your plans and liaise with your Building Control Officer (if you would like us to).

You may also need:

SBEM Calculations | Acoustic Testing | Energy Statement

View all Commercial Services