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Achieving Airtightness, Why and How: The need for joined up thinking for joined up building! - The Green Register

A half-day seminar exploring the theory and practice of achieving higher levels of airtightness.

Date TBC


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Buildings that achieve higher levels of airtightness tend to also be built and executed to a much higher quality level. While airtightness is essential to ensure thermal insulation performs to its optimum and to reduce condensation risk, it must also be combined with an effective ventilation strategy, be it by passive or mechanical means.

At its most basic, airtightness aims to eliminate any unintended gaps or cracks in the external fabric of the building. Ventilation focuses on replacing the stale indoor air with fresh outdoor air to meet the occupant’s needs. The key is to ‘build tight and ventilate right’!


  • Presentation by Fintan Wallace outlining why airtightness is now recognised as a key element in realising higher performance more durable healthy buildings.
  • Case Study by Niall Crosson on the building of his new home in Ireland to Passivhaus levels of performance.
  • Assessing key junctions for airtightness on specific details sent in by the audience prior to the training day with the Ecological team.