We specialise in testing the air tightness of various commercial developments, encompassing simple retail units, offices, industrial buildings, leisure facilities, and care homes. Additionally, we offer several ancillary services to complement our Commercial Air Tightness Testing, including Design Reviews, Pre-Air Test Visits & Inspections, Diagnostic Smoke Testing, and Diagnostic Thermal Imaging. To schedule any of these services, please contact our office.

Each commercial air pressure test is completed in strict accordance with a standardised methodology detailed within a Technical Guideline known as CIBSE TM23 ‘Testing Buildings for Air Leakage’ by an accredited Air Tightness Contractor

Most Common Areas of Air Leakage in Commercial Building

• Internal doors to riser cupboards may be closed but should not be artificially sealed.
• Lift doors should be closed but not artificially sealed. Any external lift shaft vents should remain open.
• All external doors and windows should be closed but not artificially sealed. This includes door thresholds. The exception to this will be apertures to which test equipment is connected
• Smoke vents should be closed but not artificially sealed.
• Background trickle ventilators, passive ventilation systems and permanently open uncontrolled natural ventilation openings should be permanently open. Uncontrolled natural ventilation openings should also be temporarily sealed.
• External doors, windows & manual vents need to remain closed for the test. All internal doors need to be propped open.
• Seal all ducts and penetrations where the main services enter the building. We have encountered many tests where a water pipe duct has been left unsealed underneath kitchen units. After services have been installed in the duct, seal the rest of the duct.
• All incoming service penetrations (e.g. power, telecoms) should be permanently sealed.
• False ceilings often contribute to air leakage. Please ensure that the envelope behind them is properly sealed.
• Are service risers / soil stacks sealed before they enter the loft area? Note – Fire sealed does not mean air tight!

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