No products in the basket.

Air Tightness Testing

Air Tightness Testing Services

We conduct Air Tightness testing throughout the Midlands and are able to provide air testing throughout the UK on request, providing a fast and reliable service.

What is an Airtightness Test?

An airtightness test, also known as an air permeability test, measures the amount of air escaping from the gaps and cracks in buildings. A special fan is used to gauge just how much uncontrolled air is being released from the inside to the outside. The fan depressurises and pressurises the buildings, so an accurate figure of how much air loss is happening can be taken. The building regulations for domestic and commercial new builds require that the building meets certain air permeability targets, so it is important to get this done as soon as possible so your building passes and you can use it.

Since 2006, Air Tightness testing has been required to comply with Part L1A & L2A of the Building Regulations for Domestic and Commercial new builds. Air testing measures the amount of uncontrolled leakage from gaps and cracks in the building envelope using a specialised fan to depressurise (or pressurise) the dwelling.

Do I need an airtightness test?

You should get airtightness testing companies in if there is a lot of heat escaping from your home. Heat escaping through tiny cracks and gaps in the walls can cost you hundreds of pounds a year, and thousands over a lifetime. An airtightness test is necessary if you want to pass building regulations. Airtightness tests can also stem the spread of fire, as if the air is directed correctly, the flames are less likely to take over the building and there is a better chance of putting them out.

How do you pass an airtightness test?

To pass an airtightness test you need to meet a target air permeability score. Every new building is given a score ranging from 1-10, which is considered possible for your building to meet. An SAP assessor gives you a score and we do our best to help you meet this target. The building work is only signed off once it has been met. Get an experienced air tightness technician to carry out this task for maximum reassurance. Click here for tips.

What is an air permeability test?

An air permeability test measures the amount of cubic air escaping per hour from a building. A good airtightness treating company can carry out an air permeability check. Carrying out this check will ensure your building is well insulated and has a better chance of surviving in a fire due to air being directed the proper way. If it is directed in the wrong way, flames can fan more than in an airtight building and cause a fire to engulf the building quickly.

Get in touch with Airtight Testing Staffordshire for friendly, expert advice. We have lots of experience carrying out air permeability tests, so stop air escaping and save money on your bills by booking an appointment today. We’ll make sure you comply with all airtightness test building regulations and that your building is protected from fire with air permeability tests. Airtight Testing Staffordshire will be able to advise you if you need a test and what rating you need to meet. Contact us now and speak to a knowledgeable advisor who will be happy to help.

When Should I Book My Air Test?

When Should I Get Air Tightness Testing?

  • SAP completed – this will set the target value for the air tightness testing
  • Trickle vents fitted
  • Loft hatch fitted and sealed around the perimeter
  • Plumbing complete and traps filled
  • Power available in dwelling
  • All lights and sockets fitted
  • Incoming services sealed (Electric, Water, Gas etc.)
  • Boiler flue and ventilation system penetrations sealed.
  • All windows and doors fitted
  • Skirting board fitted and sealed


Target Scores

In terms of air test requirements, building regulations have a maximum air permeability value of 10 m3.h/m2. However, each new build has a designated air permeability target, this can range from 1-10 and is usually assigned at the start of your project by your SAP assessor.

We test your dwelling to meet this initial target set by your SAP assessor. If your dwelling meets the target score, building control can approve both your air permeability score and your SAP calculations based on review.

Test Sampling

A sample test may be possible when you have multiple houses of the same build type and size. This sampling method, however, forces you to apply a 2 m3.h/m2 penalty to all houses not tested. Making it crucial for a higher build specification of the dwellings to meet air test requirements.

From our experience, air testing is often more cost-effective when all houses are tested individually. This means that you are able to avoid penalties being applied to each new build.

Expert Advice

Airtight Testing Staffordshire are here to help you move quickly and easily through the air testing process. Our experienced test engineers can offer expert advice to achieve compliance.

We also offer a wide range of other services that make it easier to pass building regulations than ever before!