A deep dive into cathedral roof design and insulation strategy. The team compares solid-sawn rafters vs. scissor trusses, smart vapor retarders vs. poly, and discusses optimal roof pitches. You’ll learn when to vent from the topside, from below, or go unvented entirely—and why those choices matter. In the last 10 minutes, the crew unpacks one of building science’s trickiest topics: 6-sided containment of air-permeable insulation—and how it impacts attic R-values and energy performance.  ...

Seriously? These 3 clowns are sages? The discussion includes how to select the "right” school. How much should a school include building science compared to learning it on the job? And what about even just the 4 control layers? And all three of us stand squarely with Steve: if you want to design buildings, get out on the job site first, second, and last over the course of your prep and your years on the job. And then take what you learn at the site to improve the information transfer yo...

All of us in the industry have projects--likely early in our careers--that we just either cringe about or wonder how the heck we got away with that one? The boys wax nostalgic about stories of their naivety over the years, turning them into valuable lessons learned. Actual building topics include spray foam, sill sealer, combining blower door & IR imaging, slab-on-grade insulation, and rainscreens. PETE'S RESOURCES: "Foam-In-Place Insulation: 7 Tips for Getting Injection and Spray ...

Installing windows is getting more, not less, complicated. Pete lobbies for a different, more durable, and simpler gasket installation of windows. Steve and Jake weigh in with their insights and challenges to what Pete is up to. And a bonus: with Steve and Jake's help, Pete creates a new word: "Poninions" (Pete crashed the words opinions and positions, and his "friends" just could not let it slide). PETE'S RESOURCES: - Pella Steady Set: https://www.pella.com/professionals/steady-set/ - Buil...

The boys start with a really cool problem-solving involving a monopoly framing, big overhangs, and thermal bridging. And the follow-up is an excellent question from Western Canada regarding the use of ZIP sheathing with a Class I interior vapor retarder. It's a great discussion involving R-values, air barriers, vapor permeability (including all Classes of vapor retarders), wetting, and drying. Whew! Good thing that Steve had a "great" joke to close this one out...(gag). PETE'S RESOURCES...

If you can't find an experienced high-performance builder, then find a professional builder who is willing to listen and learn! And add in time and money in the budget for that listening and learning. The same can go for your architect. But as Steve says: "SOMEONE has to drive the bus. Put on your big boy pants and move your business to the next level." PETE'S RESOURCES: - Building Enclosure Manufacturers Tech Support - Here are just a few manufacturers with outstanding tech support pro...

All 3 UBIP podcasters are fond of the Superior Wall System, but connecting the extended "foot" of the foundation wall panel to the basement slab is a bit tricky. But not for Steve, but of course. And while sump pumps OUTSIDE are a mystery to Pete, Jake & Steve walk Pete through it. And a bonus: using gravel to spread the structural load and better manage the water load. All that and a "joke" by Steve to-just-die-for... PETE'S RESOURCES: - Superior Wall resources on slab-to-panel connectio...

Once again, we drive wood into the ground, but only in the context of Permanent Wood Foundations. No surprise that this discussion is all about water & drainage. And some episodes ago, the boys each revealed pivotal moments in their careers in the building industry and wrapped up with a request for your pivotal moments. We got one, but what a doozy from our buddy Carl Seville of SK Collaborative. I think we might be done now (at least for a while) with PWF, but come on now: email us your ...

Two great questions about wall assemblies. The boys dig deep, exploring all the variables to consider for both wall assemblies. And no big surprise: Much of the conversation is about how to get these three control layers right (water, air, thermal) and ALSO get the drying potential (vapor) correct. PETE'S RESOURCES: - 2021 IRC - Montana NOTE: The IRC 2021 does NOT include any chapters on energy efficiency/energy requirements... - Huber Table for ZIP-R recommendations for all climates - "Check...

Whole bunch of reasons to consider SIP building systems BUT switching from stick-framing is not a walk in the park. But UnBuild It has a ton of experience with SIPs. Next up: Just how stable are the R-values of rigid insulations (the plastic ones with blowing agents) over time? The boys spend just the right amount of time on this on...(just could not resist that). PETE'S RESOURCES: - "The Complete Guide to Building With Winter Panels:" - BASC SIP Details (SIPA) -"The BuildingGreen Gui...

Should exterior above-grade wall sheathing or framing line up flush to the outside face of the foundation? Is sealing the bottom of the above-grade wall and foundation with a sill sealer product like Protecto Wrap Triple Guard a good idea? This sets off Jake, Steve, and Pete on balancing water protection, air sealing, and drying potential at this key transition and challenges for control layer continuity. Finally, Steve gets TMI with his sleeping arrangements with his wife... PETE'S RESOURCES...

Plenty of reasons for the question mark: Pete wondered what this term really meant; Jake points out that for most of his career, he was not involved in this process as a builder; Steve gets pretty heated when this process does not include budget (at least a realistic budget...). Gem here from Steve: "70% of a home's budget is hardwired into the number of square feet." PETE'S RESOURCES: - Build Show Podcast Episode 91 - Pre-construction Service Agreements

Two great questions on which the boys pontificate in fine form. Yes, ZIP-R is "backwards" (rigid insulation interior to structural sheathing) but that does not mean that it doesn't work; it does, just differently. So why don't we typically rain screen roof claddings? The short answer is it always costs more, regardless of the type of roof cladding. But you know the saying: vent until you can't... NOTE: - An Apology: Pete keeps saying "vinyl siding" when he means "vinyl wallpaper" in terms of...

What could be more fun than yammering on about scary job site stories and just how confusing a space your garage can be? You listeners ask the damndest questions, so we just keep on cranking... Per usual, Steve closes us out with humor worthy of these two questions... PETE'S RESOURCES: - "Does Safety Affect Productivity in Construction?" - From our buddy, Randy Williams: "Construction Design: Humidity Control in a Garage"

The advice starts with "don't ever do this" and then dives into the details for doing it right: slope, overhangs, pedestal systems, step-down from house to deck, and truck liners. Wait, what? Jake describes a long-past project involving a spray-on truck bed liner protective coating (and there actually ARE spray-on residential roof systems for decks—who knew?). RESOURCES: - Linex residential protective coating - "The Importance of Cover Boards in Roofing Assemblies:" - BSI-051: "Decks--Roofs Y...

Different water sources lead to different water quality issues. Eric walks us through: sources of tap water; testing water; appropriate water treatment systems responding to the testing results; and a new water frontier: PFAS in our tap water (Per- and Polyfluoroalkyl substances). Yikes! PETE'S RESOURCES: - Eric Aune Mechanical Hub - Water testing - CDC Home Water Treatment Systems - USGS PFAS in Tap Water

Eric Aune would make the perfect Marvel Superhero Plumber. With tank versus Tankless water heaters, multiple small tanks, and on-demand recirc systems, Eric brings real-world insight to all sorts of plumbing technologies and techniques. And of course, Steve closes the episode with a special look to his future. Pete's Resources: Eric AuneGary Klein - Saving Hot WaterDemand Hot Water Recirculation SystemUS EPA Water Sense

Eric provides Steve and Jake with a plumber's perspective on almost every residential, domestic hot water system available in the US. Stick around for terms like "cold water sandwich," "air-to-water," "CO2 refrigerant," and "recirc." It's absolutely gripping! Pete's Resources: Eric Aune - Mechanical HubEnergy Star Heat Pump Water HeaterDemand Hot Water Recirculation System

Jake spends time at Virginia Tech with Christine Williamson, a leading building professional who integrates building science and architecture. In her first year as an Assistant Professor of Architecture, Christine applies building science to architecture courses such as Environment and Building Systems I and II. In her own words about her new position, Christine says, "Architecture education is, I think, a lot closer to more of a fine art program than maybe a lot of people realize. That...

You say Post-Frame, I say Pole Barn or Barndominium...Yikes. The boys beat up on this topic when we move utility-grade agricultural weather-sheltering buildings (pole barns) to fully-conditioned homes. Aesthetic questions aside, there is solid building science to consider here. And speaking of building science, how do we insulate and air seal rim joists in a way that keeps them dry and durable? This topic takes us from spray foam and capillary breaks to ZIP-R and six-sided containment of inte...