Air Testing of Houses & Flats


We undertake air tightness testing of houses and flats to meet Approved Document L1 requirements.

  • We are very experienced (testing for 20 years) and can answer any of your questions about the process and potential pitfalls.
  • We will guide you through the process, providing checklists on what to look out for and what needs to be done. We will call you in advance of our visit to confirm arrival times and answer any queries.
  • Should the worst happen, and you don’t achieve the targeted air permeability, we will use our fan to identify the leakage paths. If these can be addressed there and then, we can repeat the test and hopefully achieve the required result.
  • We are ATTMA Registered which means Building Control and the energy assessor will accept our certificate.
  • Certificates can be issued on the same day.

Please call us on 01799 540220 or email us at to ask questions about what’s involved or give us a few details about your project – location, number of properties, size (approximate floor area/bedroom number) – so we can provide our price (typically £175-250+VAT for a one-off test depending upon the size and location of the property) and availability (typically around 1 week).

Call 01799 540220 – or send us a message

WhatsApp 07956 893606 – out of hours

© Air Leakage Testing Limited 2020

7 Lawson Way, Aylesbury, Buckinghamshire, HP18 0UW

Tel: 01799 540220 – Email:

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