Our Qualifications

We are qualified and accredited to do air pressure tests. The test certificates we issue are acceptable to all building control officers.

Independent Air Tightness Testing Scheme

We are accredited with the Independent Air Tightness Testing Scheme for both Level 1 (buildings < 4000m³) & Level 2 (buildings > 4000m³)

Stroma Certified

We are certified by Stroma after rigorous training and examinations

We provide air tests for these building types

Dwellings / Domestic Buildings

Commercial / Non-Domestic Buildings


How is an air test carried out?

1. Set-up Fan

A high precision fan is set up on one of the external doors - either the front, rear or side doors depending on the building.

2. Seal all Extracts

As air permeability tests are focused on un-controlled ventilation, all extracts are sealed using low tack masking tapes i.e. extractors and vents in kitchens, bathrooms, toilets, utility rooms etc.

3. Run Test

After calculating the areas of the external walls, roof and floor, and taking some background temperature and pressure readings, the high precision fan is started and used to extract air from the building. This creates a pressure differential which is essentially depressurisation. The pressure differential is measured using the tubes connected to the presssure reading equipment in the image.

4. Generate Results

After taking several sets of pressure readings and inputting in the specialist air testing software, the sofware generates the results. If a pass is achieved, the test results will be lodged with our accreditation body (iATS) and the test certificate made available to you the next working day.

If the building is failing the test, we will identify the leakage areas to enable you make remedial actions. For most minor remedial actions that can be made within a short time, we will wait for them to be done and re-test immediately. For major remedial actions, we will have go come back on a different day to re-test.

To help achieve a pass, please do review some of the main leakage areas in the photos above.