7 Minutes of BS (Building Science)

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30 minute descriptions of technical topics distilled to seven minutes.

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What separates a good exterior insulation system from a great one: fewer layers, less thermal bridging, lightweight claddings, and a dedicated air and water barrier at the sheathing...
March 12, 2026
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Jonathan Smegal from RDH Building Science discusses the importance of exterior insulation, highlighting long-term benefits like energy savings, resilience, and improved indoor...
Jan. 5, 2026
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Too much of a good thing can kill you. Including sunny weather
July 2, 2025
Science explains the natural world with a disciplined method of repeatable—and verifiable—questions, experiments, and answers
April 2, 2025
A big problem, for roofs in cold climates, but what causes it and how can you fix it?
Jan. 28, 2025
The Top-listened-to podcast of 2024: Dr. Joe Lstiburek explains the fourth state of water: ADSORPED water, with a D. It exists on surfaces as tiny monolayers that fill pores and...
Dec. 10, 2024
In this episode of 7 Minutes of BS, we grab a section of a side conversation with Dr. Joe Lstiburek about the best way to alleviate heat in houses in the southern part of North...
Nov. 12, 2024
Choosing hail-resistant roofing is as simple as looking at a chart and choosing a color
Oct. 26, 2024
If you can't build to stay dry, build to tolerate wet
Sept. 30, 2024
Siding is supposed to shed water away from walls, so what's the deal with siding that absorbs water?
Sept. 16, 2024
PVC trim expands and contracts with temperature. But it never expands as much as it does that first time, so install it tight and fasten it right
Aug. 30, 2024
Bulk water's job description is literally to rot houses, but the REAL danger occurs when it changes phase from liquid to solid, and gas...
Dec. 11, 2023