The Challenge: Unreliable Traditional EPCs

Currently EPCs relied on estimated air leakage values. These estimations often underestimated the actual amount of air leakage in existing buildings, resulting in inaccurate EPC ratings. This can have significant consequences.

Imagine a building owner who installs a less efficient heating system based on an inaccurate EPC that suggests good energy performance. In reality, due to high air leakage, the building might lose a significant amount of heat. This negates the benefits of the new system and can hinder sustainability goals.

Is Air tightness Testing the Solution for Accurate EPCs?

Air tightness testing is a non-destructive method for precisely measuring a building’s air leakage rate. It is done by pressurising the building interior slightly and measuring the rate at which air escapes.

The valuable data allows building owners or professionals to:

Air Tightness Testing in RdSAP 10

The updated RdSAP 10 methodology is due to be released on the 15th of June 2025 and will allow incorporating measured air tightness test results into EPCs, offering several benefits:

This means building professionals will be able to leverage the data from tightness tests to generate more accurate EPC ratings.

Improve Your EPC Rating with Air Tightness Testing

When you schedule an air tightness test with us, our comprehensive service provides the data you need to make informed decisions about your building’s energy performance. Here’s what you gain:

Beyond the Test: Optimising Your Building’s Performance

Air tightness test can be used to:

What’s Next?

By leveraging airtightness testing and the upcoming RdSAP 10 methodology, EPCs will soon provide a clearer picture of a building’s true energy performance. This allows for more informed decision-making, improved sustainability outcomes, and potentially greater cost savings throughout the building lifespan.

We offer a comprehensive range of air tightness testing services. Contact us today to discuss your specific needs and learn how we can help you improve your building’s EPC rating with air tightness testing.

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