Offices Nationwide 

Air Leaking Testing Across the UK

What Air Permeability Rating Do I Need?

A passing score in the UK is 10 m³/(h.m²) for an air permeability rating which resembles the amount of uncontrolled air that's leaking from the dwelling. Should the test fail, our air tightness team will help you identify where the leakages are happening in the hope that a passing score will be achieved after a re-test.

What Does An Air Leakage Test Involve?

There should be no outside access once the test has begun for approximately 90 minutes so plan accordingly. Workers can still do their job inside the property, within reason, though may feel some discomfort due to the noise of the fan and the draught that will be felt throughout the building.

An air test involves placing a large fan, or several fans, to an opening within the property; usually a doorway. The fans will increase and decrease in speed that will in-turn change the building's air pressure and record the results. Please note: an air test cannot be carried out if wind speed is more than 13mph. 3 metres per second is the ideal wind speed when undertaking an air test in the UK.

During an air test in the UK the pressure of the room will be tested and as such all windows and doors that lead outside must be securely closed to avoid them swinging open and the test being abandoned. Similarly, all internal doors should be wedged open to avoid being slammed shut. Furniture will not be affected during the test, but smaller items such as paper must be held down or removed completely so they're not blown about.

How Many Properties Need An Air Tightness Test?

The number of tests required are as follows:

  • 4 or less properties of the same type: one test needed per type
  • More than 4 but less than 40 dwellings of a type: at least two tests of each type
  • More than 40 properties of a type: 5% of each type UNLESS the first 5 get a passing score - then this can be dropped to just 2%

Do I Need An Air Leakage Test?

On a large plot of new houses that are built to a similar specification, only a sample of the houses will need to be air tested. This is outlined in Part L of Government building regulations.

Planning your test in advance will help our experience air assessment team covering the UK to determine how many tests you'll need ahead of time per property and will be happy to offer advice on the best ways to gain your air permeability rating.

Domestic properties and commercial buildings over a certain size must have a passing air leakage certificate before the property can be handed over following a sale. All new buildings in England and Wales have had this requirement since 2006 and in Scotland this has been mandatory since 2010.

When Should The Test Take Place?

A building envelope will need to be completed before the air test takes place - which should be one of the last surveys undertaken once all the walls, windows, doors etc. are complete and sealed. This ensures no air will escape and prevent drafts through the property which will in-turn improve your air permeability score.

For further Air-Testing information for your area, be sure to check out Air-Testing-.co.uk.

E2 Specialist Consultants
June 19 at 5:17pm
An office-based E2 consultant is working on the SAP calculation and EPC for a domestic new build in North Wales. For all your SAP needs in North Wales, visit our dedicated site: https://www.sap-calculations-north-wales.co.uk

E2 Consultants Delivering compliance solutions for Architects & Developers    Head Office E2 HOUSE, South Park Way, Wakefield 41 Business Park, WF2 0XJ    Questions? Call: 0800 043 8100

» » »
Air Testing
» Domestic Services » Air Testing

In Area U

Domestic AIR Tests in Uckfield, Domestic AIR Tests in Uffington, Domestic AIR Tests in Ullapool, Domestic AIR Tests in Ulverston, Domestic AIR Tests in Umberleigh, Domestic AIR Tests in Uphampton, Domestic AIR Tests in Upminster, Domestic AIR Tests in Upper Edmonton, Domestic AIR Tests in Upper Holloway, Domestic AIR Tests in Upper Hulme, Domestic AIR Tests in Uppingham, Domestic AIR Tests in Upton Upon Severn, Domestic AIR Tests in Urmston, Domestic AIR Tests in Usk, Domestic AIR Tests in Uttoxeter, Domestic AIR Tests in Uxbridge,