Pushing the Envelope – Détails, épisodes et analyse

Despite decades of knowledge, buildings continue to fail for many of the same predictable reasons. Why? In this episode, Matt Copeland sits down with world-renowned building science expert Dr. John Straube to explore why gaps in knowledge about high performance construction still remain—and how we can fix it.

From air barriers vs. vapor barriers to the myth of industry-wide know-how, this conversation peels back the layers on why "better buildings" still aren't the norm.

Whether you’re a builder, architect, engineer, or just a curious problem-solver, this episode will change how you think about construction, education, and the future of the built environment.

🔍 In This Episode

• Why sub-sill flashing still isn’t standard practice in 2025

• The "grade school" gap in building science knowledge

• How conferences create echo chambers

• Dr. Straube’s 12-step plan to fix the industry (Step 1: Admit we have a problem)

• Why bad buildings rarely get talked about—and why that’s a huge problem

• The misunderstood role of air barriers vs. vapor barriers

• Why architects don’t want to delegate enclosure design—and why that matters

• The real reason prefabrication keeps cycling in and out of fashion

• Why education—not tech—is the real silver bullet
  

🧠 Notable Quotes

• “We haven't even got past the grade school level of building science.” — Dr. John Straube
• “When I first entered this industry, it was presumed by engineers and architects that most of the problems that were experienced were because of workmanship. And the more I've worked on forensic investigations and failures, the more predominant the proportion of failure I attribute to design.” — Dr. John Straube

📚 Resources & Mentions

• RDH Building Science

• Building Knowledge Canada Spring Training

🎧 Listen If You...

• are tired of seeing the same mistakes on every job site

• want to know why building failures happen—and how to prevent them

• are looking for practical insight from one of the industry’s leading educators and practitioners

• are passionate about improving the AEC industry

👋 Connect with Us

• Matt Copeland — CopelandBEC.com | LinkedIn

• Dr. John Straube — University of Waterloo | RDH Building Science | LinkedIn
  

Please subscribe, rate, and share if you got something out of this conversation—we’re building a smarter industry, one episode at a time.

John Staube Bio

John Straube, Ph.D., P.Eng., is an Associate Professor in the Faculty of Engineering at the University of Waterloo, where he is cross-appointed between the School of Architecture and the Department of Civil and Environmental Engineering. He is the author or co-author of over 100 published technical papers, author of the book High Performance Enclosures and co-author, with Eric Burnett, of Building Science for Building Enclosures.

Dr. Straube’s leadership as a building scientist and an educator has been recognized with multiple awards, including the Lifetime Achievement Award in Building Science Education from the National Consortium of Housing Research Centers (NCHRC). As a Principal at RDH Building Science and RDH Building Science Labs, he conducts forensic investigations, assists the design of new high performance buildings, and leads research projects in the areas of low-energy building design, building enclosure performance, hygrothermal analysis, and field performance monitoring.

He has been involved in the development of dozens of new building products, and sat on several product standards committees.

🔗 Keywords

Building science podcast, John Straube interview, air barrier vs vapor barrier, building envelope design, building failures, building science education, why buildings fail, architectural detailing, sub-sill flashing, building performance, construction knowledge gap, building science for architects, enclosure consulting, offsite construction, prefab risks, Matt Copeland podcast

When it comes to moisture control, what you don’t know can definitely hurt you—and your building. In a time of evolving building codes and increasingly complex facade systems, moisture management demands a sophisticated integration of building science and design.This presentation reveals essential strategies for creating resilient exterior wall assemblies by understanding the four barriers—water, vapor, air, and thermal—within the context of 21st century building demands.We’ll explore specific design considerations for managing moisture as it relates to each individual barrier, as well as actionable QA/QC measures that can be implemented for both new construction and existing buildings.About the Presenter: Carmen PrantilA graduate of the University of Minnesota – Twin Cities with a degree in Building Science and Technology, Carmen has more than survived her share of snowy winters. Her academic background laid the foundation for a deep understanding of building design and environmental challenges that come with cold climates.Now Boston-based (yes, more cold), Carmen brings innovative solutions to her role at Copeland Building Envelope Consulting. She balances her professional precision with her passion for an active lifestyle and off-grid adventures. Outside of the office, you can find her training for CrossFit, exploring the Northeast rail trails on two wheels, or hiking in the White Mountains.

In this episode I walk through the building science fundamentals of controlling bulk air flow and water vapor diffusion using air barriers and vapor barriers. Check out copelandbec.com/podcast for the full show notes.

In this episode we dive into various aspects of unmanned aerial photography (aka "drone" photography) including the use of drones for infrared (IR) inspections and photogrammetry. Full show notes at: https://copelandbec.com/podcast/

Why do some roofs end up in the parking lot? Learn the answer to that question and much more in this this information-packed episode where I discuss the ins and outs of wind uplift design for low-slope roofing with Jennifer Keegan (LinkedIn), James R. Kirby (LinkedIn) and Benjamin Meyer (LinkedIn) of the GAF Building & Roofing Science team (LinkedIn). For more details and show notes: https://copelandbec.com/episode-3-roof-wind-design

This is a great conversation with Adrian Lowenstein, PE, MBA, National Business Development Manager for Skyline Windows. Adrian has insights on how we can move towards higher performance and higher efficiency in our building stock. We discuss a couple of new local ordinances that seek to raise the bar for performance of buildings: the Building Energy Reporting and Disclosure Ordinance (BERDO) in Boston and Local Law 97 in New York City. We also hit on topics such as pre-fabricated pre-glazed wall construction techniques, the opportunities for higher performance afforded by advancing technology and project team relationships that lead to better project outcomes.

For full show notes go to copelandbec.com/episode-2-adrian-lowenstein-berdo-performance-efficiency

My guest in this inaugural episode is Ken Kiefer. Ken is the Director of SIGA North America's High-Performance Construction Academy and expert on high performance construction, especially related to air and water control in wall assemblies. We cover a variety of topics including Ken's work on a recent passive house project in Cambridge, MA, what contractors and designers are looking for from manufacturers of high performance building materials, and some of the resources available at SIGA's High-Performance Construction Academy. 

Show Notes

• SIGA North America
• SIGA High-Performance Construction Academy
• Finch Cambridge: One of The First Multifamily Passive House Standard Projects in Massachusetts
• Passive House Institute US, Inc.

Here's a quick intro to what I hope will be an interesting podcast for architects, engineers, contractors, building product manufacturers and anyone else interested in making better buildings.

Melissa Wenzel is the Built Environment Sustainability Administrator and has worked for the Minnesota Pollution Control Agency for over 2 decades. Her current focus is on creating system-wide change within the building material management system. Working with key stakeholders across the state, Melissa focuses on reuse of buildings and building materials, and works to prevent building materials from going to landfills by encouraging preservation & renovation, reuse, and repair of buildings and building materials. She graduated from the University of Minnesota in 2001 with a Bachelor of Science in Environmental Education, and successfully completed a Sustainability in the Workplace Certificate Program in 2016 from Hamline University. She lives by her work motto: “human being first, government employee second.”

In this bonus episode, CopelandBEC Principal and Atlanta Unit Manager Arjun Bir gives a crash course on low-slope commercial roofing including actionable tips for owners to reduce costs and prolong the lifespan of roofs.