New Build Air Testing
Need an air test for your new build?
Air Tightness Solutions provides reliable new build air testing for self-build homes, residential developments and commercial projects across the UK.
Whether you need a one-off test before Building Control sign-off or support across multiple plots, we’ll confirm what’s required, book a suitable test date and provide clear certification after the test.
What is new build air testing?
New build air testing, also known as air tightness testing or air permeability testing, measures how much uncontrolled air leakage passes through the building fabric.
The test is carried out to help demonstrate compliance with Approved Document Part L of the Building Regulations and is typically required before project completion or handover.
A successful air test helps confirm that the building performs as designed in relation to:
- Energy efficiency
- Heat loss reduction
- Building performance
- Compliance requirements
- Long-term running costs
For many projects, the air test is one of the final stages before sign-off, which means delays or failed tests can impact programme timelines. That is why preparation and communication are important.
Why choose Air Tightness Solutions?
Choosing the right testing company is about more than just getting a certificate.
You need a company that understands construction programmes, communicates clearly and helps avoid unnecessary delays on site.
- Value Engineered Advice
- Responsive & Reliable Service
- Fully Accredited
We provide compliant solutions with ATTMA accredited engineers for Air Testing.
When should an air test be carried out?
An air test is normally completed once the building envelope is finished and the property is ready for testing.
Before the test, the building should typically have:
- External doors and windows installed
- Service penetrations sealed
- Mechanical ventilation systems installed
- Loft hatches fitted
- Skirting boards completed
- Major gaps sealed
- Drain traps filled
- Temporary openings closed
Booking the test too early can increase the risk of failure or aborted visits, so it is always worth checking readiness before the appointment.
Our new build air testing process
01. Initial enquiry
Send us your project details, drawings or site information.
02. Review & quotation
We confirm the testing requirements, pricing and availability.
03. Booking confirmation
A suitable date and time is arranged for the test.
04. Site attendance & testing
Our tester attends site and carries out the air pressure test using calibrated equipment.
05. Results & certification
Following the completed test, we issue the results and certification documentation.
Need to arrange a test quickly? Contact our team and we’ll advise on current availability.
What happens if the building fails?
A failed air test does not always mean major remedial work is required.
In many cases, air leakage is caused by common areas such as:
- Pipe penetrations
- Window perimeters
- Loft hatches
- Service voids
- Electrical penetrations
- Junctions between walls and floors
- Poorly sealed ductwork
Where issues are identified, remedial sealing work can usually be completed before a retest is arranged.
Good preparation before the appointment can significantly reduce the likelihood of failure.
Supporting self-build clients
If you are building your own home, air testing can feel like an unfamiliar process — especially towards the end of a busy project.
We regularly work with self-build clients and aim to make the process straightforward and easy to understand.
We can explain:
- What level you need to achieve
- When to book the test
- How to prepare the property
- Common causes of failure
- What documentation is provided afterwards
Frequently asked questions
Who We Work With
We work with a variety of clients, from independent builders and architects to large property developers and contractors. Our reliable testing and compliance services support each project’s unique needs, ensuring top standards in energy efficiency are achieved.
What Our Clients Say About Us
Carol Keith
Andy Nelmes
Need a quote for new build air testing?
Whether you are testing a single self-build property or managing multiple plots on a larger development, Air Tightness Solutions can help.
Our team provides reliable testing, practical support and efficient certification to help keep your project moving.