Air Tightness Testing

Need to discuss your Air Testing requirements?

If you would like to speak to a member of the team please call 01279 873380 or email

SES can provide you with a fast and cost effective Air Tightness Testing service to comply with your Part L1A Building regulations.

What is Air Tightness Testing?

Air Tightness testing, also known as an air leakage test is a test to indicate the cubic metres of air leakage per square metre of external area of the building per hour – [m3 m-2 h-1]. Too much Air leakage leads to unnecessary heat loss, in turn increasing your heating bills and CO2 production. As the Government strives to reduce CO2 emissions from new buildings, building regulations now place greater emphasis on the quality of the fabric of the building.

All of our air tightness, air pressure and air permeability tests are carried out in accordance with ATTMA TS1 issue 2 to BS EN 13829 method B standards, and all our test engineers are trained and registered members of ATTMA.


Will you require an Air Tightness Test?

If you have constructed a new dwelling, then Part L of the Building Regulations states that, with few exceptions, you must now have an Air Tightness Test performed on that dwelling. An air tightness test is used to calculate the air permeability rating for that dwelling. It is this rating that is submitted to Building Control and which must meet the latest Building Regulation standards for conservation of fuel and power.

One of our consultants will be happy to discuss your Air testing requirements for your development.


Why choose SES for your Air Testing?

  • ATTMA registered Air Tightness Testers
  • Air Tightness Testing
  • Typically only 2 hrs on site – minimum disruption
  • Same day results – avoid handover delays
  • Experimental investigation
  • Smoke pen testing
  • Liaison with your Building Control Officer, insurance body, or client
  • Free testing programmes designed specifically for your project at proposal stage
  • Compliance with Approved Document L1A of the Building Regulations 2000
  • Thermal imaging can also be carried out if required

As well as providing a fast and accurate air tightness test at a market leading price, our experienced energy assessors will be happy to assist you with free impartial advice regarding air tight construction details. We can also offer you a single point of contact for all of your Part L requirements, including carrying out your SAP Assessment and issuing an Energy Performance Certificate (EPC) on completion of your project.

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How much does an Air Test cost?

SES strive to be as competitive and commercially minded as possible and all of our quotations are individually tailored on a project by project basis.

If you would like to receive a FREE fee proposal please email or call 01279 873380