B4 2021 Session 5: Achieving envelope airtightness goals with an aerosol sealant

September 8, 2021

Technical Session

In this session, we explore the role an aerosol sealant can play in creating better envelopes for our buildings. We review the results of two Building America projects that used aerosol sealant technology to automate envelope sealing of new and existing homes and apartment units. This technology uses an aerosol spray to spread a sealant “fog” through a building’s interior. As the particles spread through the air, they locate and seal envelope leaks efficiently.

In one project, aerosol sealant reduced leakage by 70–80% within one to two hours of injection, a result that shows promise for aerosol sealant technology in achieving our envelope airtightness goals. This webinar will cover options for new sealant formulations that might be suited to existing buildings, surface protection that allows successful sealing while limiting cleanup costs, inspection procedures to identify larger gap leaks, and alternative spray configurations.

Fireside Chat

As buildings become more airtight, it’s more important than ever to have proper mechanical ventilation. Join our expert led discussion to learn how ASHRAE ventilation rates are calculated for new construction and existing residential 1–4-unit buildings.

As a result of this webinar, you will be able to:

  1. Learn how automated aerosol sealing can tighten new and existing residences.
  2. Identify when in the construction process the sealing can be applied.
  3. Overcome challenges for existing residences.
  4. Discover that the technology can make houses and apartments 65% to 90% tighter in only a half day.

Continuing Education Credits

  • BPI This course has been pre-approved for 0.75 BPI CEUs.
  • NAHB This webinar offers 1.5 hours of continuing education credit for the following NAHB professional designations: CAPS, CGA, CGB, CGP, CGR, GMB, GMR and Master CGP.
  • NARI This course is approved for 1.5 NARI CEUs.
  • RESNET The Better Buildings: Better Business Conference is a regional RESNET Conference and this course has been approved by RESNET for 1.5 professional development credits.

This course will not be pre-approved for GBCI credits; however, if you believe the content is applicable to your credential, you can self-report credits.

Credits are only available for the technical session. This webinar is currently being reviewed by additional continuing education accreditation organizations. Please check back for up-to-date information.

Click here for an important note on continuing education credits

If you need continuing education credits for this webinar, you will need to pass a quiz with a score of 80% or higher. You will be able to view the course on-demand, take the quiz, and complete the evaluation in Slipstream’s Learning Management System. Create an account (you only need to do this once) or go directly to the on-demand webinar. This link will not allow you to access the LMS until AFTER the live broadcast. The quiz will be available immediately after the live broadcast ends and the on-demand recording will be posted within a few days of the live broadcast ending. All credits have different expiration dates, so it is to your advantage to take the quiz as soon as possible.

About Our Speakers

Dave Bohac

Dave Bohac
Center of Energy and Environment

Dave is the Director of Research with the Center for Energy and Environment. He has over 35 years’ experience in energy efficiency and indoor air quality in commercial and residential buildings. He has been the manager of a variety of applied research, energy audit, and program development projects. His research includes measurements of commercial building envelope and duct sealing, ventilation improvements for multifamily buildings, and energy savings from multizone air distribution systems in houses. He has conducted State of Minnesota and DOE funded research on aerosol envelope sealing of new and existing residences.

Mike Lyon

Mike Lyon

In 2003, Mike started out as a new construction general contractor and later became a HERS Rater. Working for The Element Group, an energy consulting firm, he spearheaded the growth of the company. In the summer of 2018 a demonstration of a new advanced air sealing application, AeroBarrier, convinced Mike and his colleagues this was the positive disruption to advance building techniques the industry needed. After investing in the technology, two years and 400+ AeroBarrier seals later, Mike felt it was time to personally make a larger impact, contribute not just on a regional scale for AeroBarrier but on a national scale. In early 2021, Mike came on board as a member of AeroBarrier corporate team – carrying the title as Lead Applications Engineer. Fun fact - Mike’s favorite myth is that you can build or renovate a house to be “too tight”, knowing there is much more to the story. Mike’s honors include Technical Advisory Committee Member – Energy Efficiency & Sustainability State of Minnesota, Iowa, and Indiana LIHTC program, Energy Star Certified Homes Market Leader Award Recipient 2014-2020, McDonald’s Spirit of Service Award Recipient, and Admiral in the Great Navy of Nebraska Award Recipient.


Robert Parkhurst

Robert Parkhurst

Robert is an award-winning and long-standing energy efficiency advocate who has made outstanding contributions to advance both state and national weatherization goals for the past 35 years. Robert played an integral role in the adoption of the ASHRAE 62.2 Standard by the Wisconsin WAP program. He was involved with data analysis, field research and the development of program policy to make ASHRAE 62.2 work for WI WAP.  


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