Building Science Unfiltered: Dr. Joe Lstiburek Tells It Like It Is

Dr. Joe Lstiburek (Building Science Corporation) delivers a no-filter talk on what actually makes buildings durable, sustainable, and resilient. From “fire first, structure second, energy last” to real-world lessons from Grenfell Tower, hurricanes, floods, and wildfires—this is a masterclass in avoiding the hidden risks of “efficiency” when it compromises safety and moisture control. Biggest takeaway: it’s okay for buildings to get wet… if they can dry.

00:00 Thanks to Our Sponsors + Huge Turnout

00:14 One More Round of Applause

00:19 Thank You to the Community + Special Night

00:42 Introducing Dr. Joe Lstiburek (Building Science Corporation)

01:13 Joe’s Opening Story: 30 Years With Southface

01:54 “Durable, Sustainable, Resilient” (And Why People Get It Wrong)

03:26 Longevity = The Greenest Building (Carbon & Common Sense)

06:24 Defining “A Long Time”: 3x Mortgage = 100 Years

07:53 Joe Rule #1: Don’t Do Stupid Things (Safety First)

08:29 Carbon Monoxide & The Ethics of Building Science

09:49 What a “Building” Is: The Environmental Separator

11:45 What Matters Most: Fire First, Then Structure

12:56 The Rule: “It’s OK to Get Wet… If It Can Dry”

13:47 Modern Materials: Why OSB/Engineered Wood Changes Everything

16:22 Fire Mistakes: Vented Assemblies, Grenfell, and the Wrong Priorities

19:03 Damage Functions: Water, Heat, UV (In That Order)

21:33 Grenfell Tower: Energy Retrofits That Turn Deadly

23:30 Why Ventilated Cladding Can Become a Chimney

26:35 Fire Case Studies: Honolulu + Vegas (Why They Didn’t Spread)

28:10 Wildfires, Floods, Hurricanes: Stop Building in “Stupid Places”

30:27 Katrina + Lower Ninth Ward: The Brad Pitt Rebuild Story

32:10 Hurricane Building Basics: Build Up, Don’t Vent, Dry Out

35:12 Wildfire Design: Embers, Roof Vents, and “Shingle Warranty” Myths

37:05 Resilience Checklist: Noncombustible Cladding, Airtightness, Don’t Die

39:01 Origin Story: Peeling Paint, Wall Insulation, and Drying Potential

41:11 Why Vented Attics Rot Roofs (When You Insulate)

42:12 Backdrafting Research + Weatherization Done Right

42:43 Vapor Barriers in the Wrong Place (AC Buildings + Mold)

44:13 “Paper Buildings”: Drywall, Moisture, and Better Detailing

45:01 OSB vs Plywood: Why One Survives Wetting

46:50 Wrap-Up: Don’t Kill People, Don’t Kill Buildings, Save Energy