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Retrofitting an existing property to a Passivhaus or low-energy standard is a highly effective way to improve how comfortable it is, reduce heat loss and lower long-term energy use.

Interim air tightness testing is an air leakage test carried out before a building is fully finished, usually before plasterboard, drylining or final linings are installed. It helps identify leaks in the fabric of a building while they are still easy to access and repair.

In Scotland, air tightness testing is no longer treated as a box-ticking exercise, it sits at the centre of building performance, energy compliance, and long-term fabric durability. As building standards continue to tighten under Section 6 of the Scottish Building Standards, the expectation is clear: buildings must not only be well insulated, but also properly sealed.

Air tightness testing has become a key part of the construction sector in the UK. Thanks to stricter building regulations and growing pressure to improve energy efficiency, developers, contractors and energy assessors are expected to meet clear performance standards. That’s where Retrotec air tightness testing equipment plays an important role.

Preparing properly for an air tightness test can make the difference between a straightforward pass and expensive remedial work. Whether you are a developer, self-builder or contractor working towards compliance with Scottish Building Standards, knowing what to expect and how to get ready is essential.