Upcoming Events

Aug 6 2020 Online Learning /

OAA Webinar | Low-Energy Heritage Building Retrofits: Insulating Safely

11:00 AM - 12:30 PM

Event Page


Webinar Description

Low-energy building retrofits are a requirement of any plan to reach a carbon-neutral economy before 2050. Major existing building retrofits conducted now will still be in service by that time, including heritage buildings. This means high insulation and airtightness retrofits to reduce needed energy generation to meet targets. But how do you ensure you do not destroy the heritage fabric with the resulting change in heat flow through the exterior walls? What are the freeze-thaw risks?

This session will look at new techniques to analyze and model various heritage building projects now underway, and how these techniques allow for a more rigorous and fact-based approach to insulating these buildings in our cold climate. We will look at the results of two projects and tie in the impacts of the building envelope improvements on the overall thermal energy demand intensity (TEDI) performance and greenhouse gas (GHG) reductions for the facilities as part of the whole-building energy modelling also undertaken. We will also outline the building data monitoring programs that are being introduced to assess success.

Learning Objectives

  1. Understand the importance of the building envelope on energy use and greenhouse gas emissions.
  2. Become aware of the new techniques for assessing heritage building envelopes for risk related to changes in energy use.
  3. Learn solutions to heritage envelope improvement learned from two example projects.
  4. Tackle the myths of allowable changes to heritage building fabrics.


David Kayll, FMA, P.Eng.

David Kayll is a senior building science specialist, project manager, and principal in Morrison Hershfield’s Ottawa office. He has over 30 years of experience in building science, building envelope performance, energy performance, and facility management on multi-disciplined architectural/engineering teams for new and renovation construction on heritage, institutional, industrial, commercial, and residential facilities. His experience includes 10 years on the East Coast, five on the West Coast, and more than 15 in the National Capital Area. David provides facility management consulting expertise on carbon-neutral studies, asset management plans, strategic accommodation strategies, and re-commissioning plans. He is a member of the National Codes Commission Standing Committee on Environmental Separation and has served on the 2015 and 2020 code cycles, and will continue into the 2025 cycle. David is registered as a professional engineer in the provinces of Ontario, Nova Scotia, and Manitoba.

Registration Fee

OAA Architect, LTOAA $39 + HST
OAA Interns $29 + HST
Non-Members: $59 + HST

To Register, click here. 

** Registration will be closed on August 5 at 11:59 PM. **