The iATS scheme is approved by DCLG as a competent person scheme for air tightness testing. A link to the list of members can be found at the bottom of this page.

Please Note: Only Certificates in the following exact format are valid iATS Certificates registered through the iATS lodgement portal. If you receive an iATS Certificate not in this format which has an iATS logo or iATS registration number on it, please forward it to the email

Any certificates not in the format below must not be accepted as an iATS Certificate.


A list of iATS Members can be viewed here