The Green Register - Airtightness Specification Drawings: The Process from a Contractor’s Perspective Session 3 of 4
Airtightness in detail for designers and builders.
Following the successful launch of this series of airtightness events last year, we're pleased to again provide this essential and popular training, consisting of four events running every Wednesday in October, in partnership with The Green Register. The series will cover all aspects of airtightness with each session lasting 2 hours and these can be attended individually or as a whole.
15th October
Date and time
15th October 2026
9:00am - 11:30am
Location
Interactive Online Training
Description
Session 3 will focus on Airtightness specification drawings from a Contractors perspective. Niall Crosson will recap on the red line rule for the air barrier line and how to define and review it, along with taking a look at how windtightness is defined and the blue line rule. In this session there will be a demonstration on how drawings are marked up for 3 common build types (Masonry, Timber Frame and CLT) and the strategies to adopt for airtight sealing.
Participants will then have the opportunity to look at elevation drawings with examples of different junctions and mark them up with the help of an experienced technical mentor who will facilitate the process and discussion.
Speakers
Niall Crosson
Technical Director (BTech, MEngSc, MIEI, CEPHC)
Niall is the Technical Director for Ecological Building Systems and was also the company’s first employee. Niall holds a first-class honours degree as a Bachelor of Technology and a Master's in Eng. Sc. Niall is a certified Passivhaus Consultant and has provided technical guidance on many award-winning low-energy projects in Ireland and the UK, and has authored or co-authored several chapters in both the Passivhaus Handbook and the Passivhaus Designers Manual. Niall is also a founding member of the Irish Green Building Council and provides guidance on several national standards committees. Along with this, Niall has contributed to several construction publications, including The Journal of the RIAI.
Ilias Igoumenidis
Technical Project Manager (MEng Civil Engineer, CEPHD)
Born and raised in Greece, Ilias graduated from the Polytechnic school of Civil Engineers of Patras University and for many years ran his own Design and Construction company prior to joining Ecological. Since 2013, he has been heavily involved with low energy consumption in building projects. He was the first person in the Hellenic Passive House Institute to gain the International Certification of a Certified Passive House Designer. Ilias played a significant part of the first Certified Passive House project (Enerphit) in the south eastern Mediterranean area “Passivistas”.
Dave Judd
Technical Specification Advisor (BSc Hons, MSc)
Dave has extensive experience with energy efficiency retrofits and is well acquainted with the “fabric first” principles of integrating airtightness and insulation in both new-build and existing buildings. He has also worked within the domestic renewable energy sector, with the main emphasis on solar PV, solar thermal and biomass systems. He has a Degree in Environmental Science and an MSc in Architecture: Advanced Environment & Energy Studies and recently qualified as a Certified Passive House Tradesperson with the Passive House Institute. Outside of work, Dave enjoys trail running and cycling, growing vegetables and being sociable.