Airtightness is fundamental
to sustainable buildings

Airtightness Consultancy – Training – Testing

Too much air leakage is bad for our buildings and bad for our health. Aldas can help

Welcome to Aldas

Home of Airtightness Champions

Paul Jennings of Aldas is the most experienced airtightness tester and consultant in the UK, with over 30 years’ experience.

We undertake airtightness testing, air leakage investigation and also thermographic inspections for both domestic and commercial buildings. For challenging and major projects requiring exceptional airtightness, Aldas will work with you to develop a solution.

Aldas are experienced trainers and offer online training and practical training around the UK. We originated the “Airtightness Champion” concept, delivering numerous on-site trainings, conference presentations and many CPD seminars to architects and builders. Aldas developed the 12 Steps to Airtightness approach to enable UK construction to reliably deliver the demanding airtightness targets in Passivhaus and other low-energy projects

Our Services

We offer consultancy in all aspects of airtightness on both domestic and commercial buildings. Drawn on from a wealth of experience and knowledge

Aldas undertake bespoke and complex testing and leakage investigations, also thermographic inspections.

Aldas provide personalised up-skilling training for specialist sealers and those overseeing airtightness delivery

Aldas can help with building airtightness into the design phase which is key to achieving minimal air leaks.
Prevention is better than cure!

Aldas are able to offer Passivhaus site inductions and training for tradespersons working on their next PH project

Built on Aldas’s experience we developed the 12 Steps to Airtightness to help deliver low energy buildings

get trained
Airtightness Training

Aldas offer both online and practical training

get involved
Airtightness testing

Aldas are the most experienced Airtightness testers and consultants in the UK

Learning Through Knowledge
Aldas Resources

Our resources are a distillation of over 30 years experience finding air leakage

12 steps to airtightness
air leakage experts
12 Steps to Airtightness

Built on Aldas’s experience we developed the 12 steps to airtightness to help design and deliver low energy buildings.

Case studies
Case Studies

See some technical details of a range of big projects Aldas have been involved with

where do buildings leak
See the problem
Where do buildings leak

A comprehensive guide by Aldas

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Aldas provides online flexible training, based on their knowledge and experience of Airtightness in both domestic and commercial buildings


Aldas offer practical Airtightness training using a range of airtightness demonstrators to allow everyone to gain the skills and knowledge when onsite

Q & A

Q & A

Ask the experts a question and learn from others with an online Q & A session. Send us your specific question and we will look at this for you

Registered with ATTMA

The Air Tightness Testing & Measurement Association (ATTMA) is a professional association dedicated to promoting technical excellence and commercial effectiveness in all air tightness testing applications. It was formed in 2002 to promote the testing and measurement industry and supports its members by extending market awareness of the technology and the members’ services.

Organisations we work with

Building bridges to a sustainable future

Home of Airtightness Champions

Please contact us so we can assist with all things related to Airtightness

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