airtightness uk
Building Performance Testing Services
Airtightness UK provides a comprehensive range of building-performance testing, ventilation commissioning and diagnostic services.
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We support homeowners, builders, developers, housing providers and retrofit professionals with accurate testing, clear certification and practical guidance. Whether you need to demonstrate Building Regulations compliance, investigate a failed result or understand why a building is not performing as expected, our experienced team can help.
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Background Ventilation Testing
Background ventilation testing assesses whether a property has sufficient ventilation to support healthy indoor air quality following retrofit or energy-efficiency improvements.
We assess the available background ventilation and air-transfer routes, including trickle ventilators and internal door undercuts, providing clear results and practical recommendations where improvements are required.
Part F Testing
We provide fully compliant Part F testing and commissioning for domestic ventilation systems, including extract fans, dMEV, MEV and MVHR. Using calibrated equipment and experienced testers, we deliver fast, accurate results that support Building Regulations compliance and Building Control sign-off
Room Integrity Testing for Gas Fire Suppression Systems
Airtightness is essential for room integrity testing because it determines whether a protected space can hold the extinguishing gas long enough to suppress a fire effectively. By identifying leakage through doors, penetrations, and joints, the test helps ensure the room meets required retention times and that the gas suppression system will perform as intended.
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Isolation Room Testing
Isolation room testing checks that a room can maintain the correct pressure and airflow to contain airborne contaminants and protect patients and staff. By measuring airtightness and leakage points, the test helps verify that the isolation room performs as designed and remains compliant with relevant standards
Smoke Shaft Testing
Smoke shaft testing confirms that a smoke ventilation shaft is sufficiently airtight to perform effectively in a fire, helping to keep escape routes clear and support safe evacuation. The test identifies leakage paths in the shaft fabric and seals, so any defects can be corrected before commissioning and the system can achieve its required performance.
Plenum testing
Plenum testing checks that the void beneath a raised floor is sufficiently airtight to deliver conditioned air efficiently and evenly across the space. By identifying leakage through joints, penetrations, and perimeter details, the test helps improve system performance, reduce energy loss, and ensure the plenum meets design and compliance requirements.
Thermal Imaging
Thermal imaging is a non-invasive inspection method that uses infrared technology to reveal temperature differences invisible to the naked eye. It is widely used to identify heat loss, insulation gaps, moisture issues, and overheating components, helping property owners and engineers spot problems early and improve efficiency.
Smoke Testing
Smoke testing is a simple diagnostic method used to reveal leaks, airflow paths, and hidden defects that are not easy to see during a visual inspection. By introducing smoke into a system or space, it helps identify where air is escaping or where performance issues may be affecting safety, efficiency, or compliance.