Are you visiting from outside your region? Visit your regional site for more relevant services and pricing.

Airtightness Testing Level 1

Contact Events

A 4-day training course that focuses on the theory and practice enabling delegates to pass the examinations and begin the ATTMA registration process.

      • 4 days
      • 1st delegate: £1,400.00Subsequent delegates: £1,150.00
      • Old Bracknell Lane West, Bracknell, Berkshire RG12 7AH
      • Book
    • Due to popular demand, this event is now fully booked. Please contact us to enquire about additional dates. Enquire



A 4-day Training Course

Airtightness is the measure of how much air leakage there is from a building. This is determined by carrying out an airtightness test, and the figure obtained from the testing is the air permeability value.

Air leakage can be measured by pressurizing or depressurizing the building to see how much air flows in or out of the building at a given pressure. Air tightness tests are useful to architects, building services designers, energy assessors, builders, services installers, fire sealers, air tightness testers, building controllers, building owners/ occupiers, etc. Airtightness testing is the best way to assess the performance of the building fabric in stopping the uncontrolled passage of air. It is also a very effective method of locating air leakage paths in a completed building.

Since the 2006 changes to England & Wales Building Regulations and 2007 changes to the Northern Ireland Building Regulations, airtightness testing has been mandatory for new buildings. In Scotland it became mandatory in 2011 starting with flats and maisonettes and later expanding to all new dwellings. In the case of new dwellings, a sample of dwellings on every development must be tested. Testers must either be registered through a scheme such as the ATTMA scheme, or demonstrate to building control that they are competent to test and are using UKAS-calibrated equipment.

This 4-day course provides the theory behind airtightness testing as well as hands on training. It culminates in a three part examination which, when passed, will enable delegates to begin the process of registration. The practical demonstrations and practical exam on this course are carried out using Minneapolis blower door equipment.

Please read the additional information on the course, including procedures for registration.

The course covers regulations and standards applicable in all parts of the UK, regardless of the location of the course.

The prices below include the Initial Review.

Register your interest in this training course.


The course is built around the National Occupational Standards ASTATT1 to ASTATT10. These can be downloaded from ATTMA.These specify the standards that airtightness testers are expected to achieve in their work and hence the knowledge and skills taught on the BSRIA course.

The course will provide sufficient theory and practice to enable delegates to test buildings using Minneapolis blower door equipment, pass the examinations and begin the registration process.

Delegates will have an overall understanding of technical standards, the use of Blower Door Equipment and how to interpret the test results provided by that equipment.

To find out more about airtightness, download our topic guide.

Who should attend

Anyone who either intends to undertake airtightness testing or who is already doing so.

Pre-course knowledge
To get the most from this course

  • Delegates should be computer literate.
  • Delegates should have a base knowledge of mathematics, physics and construction practice - you can test your knowledge by downloading our quick test. Please do not send your completed test back to BSRIA.
  • Delegates should understand the basic concept of building envelope areas.
  • Delegates in England, Wales and Northern Ireland should download and read ATTMA TSL1 and ATTMA TSL2 and bring copies with them when they attend the course. Delegates in Scotland should download and read ATTMA TS1. These can be downloaded from ATTMA (It is not necessary to understand the formulae in Appendices A and C).
  • Delegates who intend to carry out tests in Scotland or the Republic of Ireland should obtain a copy of BS EN 13829:2001 "Thermal Performance of Buildings. Determination of air permeability of buildings. Fan pressurization method". This can be purchased from BSI Group or other sources.
  • Delegates should download National Occupational Standards ASTATT1 to ASTATT10. These can be downloaded from ATTMA. It is not necessary to print these.

Content and timings

Days 1-3 Classroom based

  • Reasons for carrying out airtightness testing
  • Background information on Building Regulations
  • Overview of the guidance in Approved Documents/Technical Handbooks
  • How to comply with the Regulations and guidance
  • Calculating envelope areas
  • Site Health and Safety
  • Technical Standards
  • Conducting the test
  • Reporting the test
  • Common Problems

Day 4 - The Examination
The examination divides into 3 parts

  • Theory paper (Open book)
  • Envelope area measurement (Open book)
  • Practical (divided into 2 parts)

Delegates will be invited to return at specific times during day 4 and should allow a minimum of 4 hours for the examination.

Please note that to successfully complete this course delegates must pass all modules in the examination. Should a delegate be unsuccessful they will be invited to return to BSRIA at a later date to re-take the module(s) they were unsuccessful in completing. There is no opportunity to retake the module(s) on the day of the examinations.

Start time : 09.30
Finish time: 16.30 (except day 4 which is dependent on examination timings).


Delegates are provided with a training pack containing a copy of the slides, a copy of the relevant Approved Document or Technical Handbook and a BSRIA CPD certificate.

Delegates should bring a scale rule and a calculator. We also strongly advise that as elements of the practical examination will be outside that delegates bring warm/wet weather clothing.

Delegates may wish to bring a laptop, although this is not compulsory. The software used on the course can be downloaded here . Click the “downloads” tab, scroll to the bottom of the page and click the download button for “Energy Conservatory Tectite Express UK V4.0.46.2 software.


David Bleicher has a background in building services design, with experience of mechanical and electrical design both in the UK and in the USA. He joined BSRIA in 2005 and has worked on research projects, design reviews and he also leads the BSRIA training programme. Read David's full profile.

Edward Bramwell is an assosiate lecturer at BSRIA, a consultant engineer and the managing director of his own airtightness testing company. Read Edward's full profile here

In-company training

This course can be run in-company. We can also customise courses to meet the training needs of your staff. For more information, or for a quote email

Airtightness testing equipment

BSRIA Instrument Solutions offers a comprehensive range of airtightness equipment available to purchase or hire

Product details

  • Publisher: BSRIA
  • CPD Hours: 24