This is Q&A with Adult Supervision: Kohta Ueno. Kohta is so efficient we nailed SIX building enclosure questions: Listener Gagan - reconfiguring existing walls with new control layers; Listener Bill: the need for dedicated vent space with vertical metal siding on ICF walls; Listener Michael - rainscreens for roofs instead of walls; Listener Sean - best detail for using mineral wool (exterior continuous rigid insulation) on a roof; Listener Miles - hip roof in Arkansas best practice: vented roof, vented attic, what type of insulation; Pete asks Kohta's cut on ORNL's new BuildingScienceAdvisor.

Jake hooks up with the same custom builder team

Luke Mann - Rangeline Homes https://www.rangelinehomes.com

Jackson Andrews - Building & Design https://jacksonandrewsbuilding.com

Shane Durkin, Patriot High-Performance Homes https://www.buildpatriot.com

For a roundtable discussion on the ideal client. Key topics include vetting clients by matching company strengths to client expectations and budget; the two-way street of trust and respect; the importance of references or background checks (they go both ways); pre-construction services to move the project forward; and finally, red flags...as both warnings AND opportunities.

Guest Reuben Rudisill is Huber's Research, Development, & Innovation engineer, joining Jake & Pete from the Building Science Corporation Summer Symposium in Westford, MA. Jake & Pete know just enough to get in trouble when it comes to structural details of ZIP, ZIP-R, and Advantech Huber OSB panels, so Reuben quite gently sets these guys straight on how high-performance OSB is manufactured and tested, how fasteners are as important as the panels, and what you can and cannot do with each of Huber's panels. The podcast does close out nicely with how important friendships are in the building business world (we could get this "touchy-and-feely" because Steve was "missing" for this podcast...).

Join Jake and Steve as they chat with Ross Trethewey, of TE2 Engineering and This Old House, at Building Science Summer Camp 2023.

Steve calls SketchUp his electronic clay model which he can use with his builder, his enclosure consultant, and his clients. Pete gives up the dirt on WebSoilSurvey, the 1st tool he uses on every project design/spec review. Jake heads home for his favorite tool - his new Aarow Building office. Last but not least: Steve returns with his 2nd favorite tool--the field. Getting out to job sites and seeing his design work play out as a process--no substitute and this tool is key to Pete and Jake as well.

What should we monitor, and what do we do about elevated levels of indoor pollutants? Air temperature, relative humidity, parts per million CO2, PM 2.5

The top leading edge of a PSA tape running horizontally is not weather-lapped or mechanically attached, depending solely on the adhesion of that top edge to the substrate to keep water out of the WRB/PSA tape system. Are ALL PSA tapes in WRB systems self-terminating? Is there a way to quantify the top-edge adhesion that makes the tape self-terminating? The boys go at it over this one!

Our homes use way more water than you think they need to. The boys dive deep into water efficiency and performance, from toilets to showerheads to hot water recirc systems.

Despite how consistently and relentlessly the boys have dissed ICFs, this episode takes ICFs seriously and fairly (or as best as Jake, Steve, and Pete are capable of...).

Four Cool Questions:

1 - Airtight Drywall Approach from Aussie Sean;

2 - Continuous Insulation (moving from below-grade to above-grade walls) from UBIP buddy Ian;

3 - Frost Protected Shallow Foundations (anonymous) ;

4 - Roof penetrations from Jake's IG buddy Jeff

This week the UBIP takes on the topic of control. Jake tries to convince Peter and Steve that the hierarchy we address the four control layers is wrong. Can Jake turn Peter or Steve to his dark side of ideas? Probably not, but the conversation is still valid. Where do you land?

Lots to consider from frame to finish in terms of materials and connection to main structure. The boys agreed that--for bulk water management--attaching the deck ledger to the main structure should be done either for lateral stability only or with the ledger spaced out from the main structure.

Space conditioning loads can be managed by building professionals through building enclosure and mechanical system efficiency--easy-peasy. But what about the loads determined by occupants and their behavior: domestic hot water, appliance, lighting and plug loads? The boys load up to tackle all kinds of issues and loads connecting energy efficiency and thermal comfort; connecting generation and distribution; connecting human behavior and energy efficiency.

From environmental footprint and slump tests to value-engineered footings and post-tension slabs, the boys do some solid coverage of concrete in buildings. While Pete suggested this topic, Steve goes from skeptical to the leader on all things concrete.

Listener Wes asks about radiant barriers (Pete goes way deep on this one...); listener Chris G wants to know if there is a "perfect" (ala Joe Lstiburek) shower wall (with Pete responding he had just taken a shower that had a "perfect" wall); listener Howdy (dubbed so by Jake 'cause we did not have his name) from Climate Zone 3 asks about new construction, unvented roof assemblies (including a Lstiburek "perfect" roof with only topside rigid insulation); and finally British Columbia listener Harpreet asks about what sort of WRB to use with structural wall sheathing that is almost always damp.

Listener Steve C--mitered corners on cladding (plus "Trust But Verify" t-shirts!); listener Jason L--detailing Huber ZIP-R at window openings; Listener Dan--worry over window details with ZIP-R; Listener Jeff (who buttered us up with his love for UBIP)--cavity fill rockwool or CCSPF in retrofit and if CCSF can it be the WRB/can new OSB sheathing be the WRB?

Suzanne from Bozeman asked such a great question it gets a SECOND podcast but this time focusing on how far is too far when remodeling in general (instead of just an addition). Tons of cool issues but here is a "gem" from each of the boys.

STEVE: Consider re-design before adding new design. How well are existing spaces being used? Maybe reconfigure/repurpose as the most efficient remodel?

PETE: EVERY remodeling project should start with a full hygrothermal building assessment.

JAKE: All remodeling projects need to start with aligning client expectations with the custom set of constraints each unique structure brings. Do the best your can/as much as you can to any portion of the building you "touch" as part of the remodel.

Featured in this episode--from Suzanne in Bozeman Montana: When renovating, how far should you take performance improvements, on the whole building, on just part of it, or an addition? What about going from the inside versus the outside? What about dealing with windows?

The overall UBIP response? Do as much as you can, in as much of the building as you can, WITH the same control layer priorities: water first, air second, thermal last. But boy are there still a lot of questions to dive into.

Window weeps are the drainage system for the Insulated Glazing Unit (IGU), protecting the vulnerable seals that sit at the bottom of the IGU. Do all windows have them/need them? Are they meant to handle interior condensation as well as exterior leaks? Should they drain to the face of the frame (visible) or to the bottom of the window frame (hidden)? Pete remains sad, curious, and even a bit disgruntled at how little our industry seems to address, systematically, window weep systems.

The BS of BS--the bullshit of building science--is Steve's way of characterizing sound building science gone haywire in totally screwy application. Examples include paralyzing worry over vapor diffusion as a way that buildings get wet, insane levels of exterior insulation in below-grade walls, using only financial payback when comparing double- and triple-pane windows (ignoring thermal comfort and durability). Add in over-insulation of window frames, bans on spray foam, and you have the UBIP combined blood pressure skyrocketing.