A Holistic Approach Towards Improving Airtightness, Part 4: Putting it All Together

Event date: March 10, 2020
Showtime: 8:00am-5:00pm
Location: Sheraton Vancouver Guildford Hotel (15269 - 104 Avenue Surrey, BC V3R 1N5)

In partnership with FortisBC’s BUILT BETTER program, HAVAN and CHBA Fraser Valley are presenting the fourth full-day session of a four-part series, A Holistic Approach to Improving Air Tightness on Tuesday, March 10 at the Sheraton Vancouver Guildford Hotel in Surrey. Led by Hamid Heidarali of Hamid Design Build, these highly interactive and hands-on workshops are designed to bring together builders and their teams (site staff, designers, trades, consultants). Team learning is the key to building better homes.

In Parts 1, 2 and 3 of this workshop series “A Holistic Approach towards Improving Airtightness”, participants were exposed to holistic long-term airtightness solutions for roofs, decks, above grade walls, below grade assemblies, windows and doors. In Part 4, which will be the last Part of this series, the learning lessons of the last 3 Parts will be put into test. To get the most out of this Part, it is strongly recommended that registrants have at least participated in one of the previous three Parts.

Event Agenda

After a quick overview of the key lessons covered in Parts 1, 2 and 3, participants will be divided into 4 groups, and will collaborate together to develop a complete set of high-performance building envelope details (12 details by each group) for a house selected by the presenter. This fully interactive and hands-on exercise will run till noon.

After lunch, the details developed by the 4 groups will be reviewed by the presenter, and will be put forward for discussion and brainstorming with the participants. Once this process is complete, the group that has managed to develop the most complete set of details will be announced.

The last 1 ½ hour of the workshop will highlight examples of those building envelope assemblies that (while offering a good level of energy efficiency), lack the holistic approach covered in this 4 Part series, thus posing the risk of compromised long-term performance. The participants will then be asked to provide suggestions on how to improve the overall performance of the highlighted assemblies, and address the issues of concerns.

Similar to last three Parts, Part 4 workshop will be supported by around forty mobile assemblies as well as a wide range of air barrier systems and products.





  • Hamid Heidarali, P. Eng

    Hamid Heidarali has a strong passion for high performance, durable buildings that minimize their impact on the environment, while providing a superior experience for their occupants. Having worked as a building science consultant on a wide range of projects over the past 15 years in Canada has provided him with valuable insight into building envelope issues and practical solutions.

    Hamid holds Professional Engineering designation in Ontario and British Columbia, a LEED Accredited Professional in Canada, and a certified Passive House Tradesperson through Germany. He received his Master of Engineering in Building Science and Construction Management, and his Bachelor of Science in Civil Engineering.

    Hamid is a principal at HDB, a building science consulting firm based in Vancouver, Canada. He is a part-time instructor and faculty at the British Columbia Institute of Technology (BCIT), and teaches building envelope courses to Masters Students as part of the Building Science Graduate Program. He also offers interactive workshops to construction professionals on a regular basis.