February 3, 2021 - 12:00pm

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Building Enclosure Control Layers

Modern high-performance building enclosures utilize control layers to manage heat, air, water, and vapor transport through walls, roofs, waterproofing, and fenestration. This presentation will provide an introduction to the building science of these key four phenomena of building physics, the mechanism for how they work, and strategies for controlling their transport in assemblies. The goal of this presentation is that each participant will be able to identify how common building materials (e.g. WRBs, insulation, curtain wall, concrete, etc.) are able to control air, heat, water, and vapor and describe which metrics are used to quantify those movements. These metrics will be shown in the context of the requirements of common buildings codes and industry standards. Recent building science research will be shared along with developments and upcoming changes to these metrics. 

Learning Objectives

  1. Understand the mechanisms of heat, air, bulk water, and vapor and how they transport through building assemblies.
  2. Learn the importance of air barriers and common challenges with their installation.
  3. Learn the benefits of continuous insulation and common challenges to achieving it in the field.
  4. Understand key strategies for achieving durable, energy-efficient, and thermally comfortable wall, roof, and below-grade assemblies.



Presenter: Keith A. Simon, AIA, CPHC, BECxP, CxA+BE, LEED AP, CEI
Senior Architectural Consultant, Senior Associate at Building Exterior Solutions, Inc. (a division of Terracon)

Mr. Simon joined Building Exterior Solutions, Inc. (a division of Terracon) in April of 2014. He is a Registered Architect, Certified Passive House Consultant (CPHC), Legacy LEED AP, and Building Enclosure Commissioning Provider (BECxP) with over 15 years’ experience in architectural design and building enclosure consultation. His experience includes peer review, design assistance, durability analysis, construction administration, testing, and forensics of building envelope issues and is the Building Enclosures Department Manager for Terracon’s Austin Facilities office. Mr. Simon was the founder of the Austin Building Enclosure Council (BEC: Austin) and currently serves as a board member for BEC: Austin and the Passive House Austin Chapter as well as the Secretary for the National Institute of Building Sciences (NIBS) Building Enclosure and Technology Environment Council (BETEC) executive committee. Mr. Simon is a Terracon SME (Subject Matter Expert) for Hygrothermal Modeling and Building Enclosure Commissioning (BECx). Mr. Simon is also a member of the American Institute of Architects (AIA), the Society of Building Science Educators (SBSE), and has been adjunct faculty at the University of Texas School of Architecture (UTSoA) in Austin since 2011. Mr. Simon was awarded the 2012 Emerging Professional Honor Award by the Austin AIA as well as the Terracon 2017 Outstanding Contributor Technical Professional Company-All recipient. 

While we are still practicing social distancing due to the pandemic, all meetings will be virtual, conducted via Zoom. To receive reminders, please sign up for the BEC Committee mailings in the footer of our website.

BEC: Austin is an interdisciplinary organization that promotes the exchange of information on building enclosures and related science specific to the climate of Central Texas.

Interdisciplinary:  architects, engineers, contractors, building owners, consultants, facility managers, code officials, educators, manufacturers, and those with a stake in building enclosure performance

Exchange of information:  discussion, training, education, outreach, and awareness

Building enclosures and related science:  energy-efficiency, moisture control, indoor air quality, longevity, and durability

BEC: Austin typically meets the first Wednesday of each month from 12-1pm.
2021 BEC: Austin Committee
Chair: Andrea Hellerman, AIA
Chair-Elect: George Wilcox, AIA
AIA Austin staff liaison: Julia Brown