Justin and Matt welcome video director Colin Russell to the podcast round table, where the day’s discussions range from Justin regretting his advice on I-joist roof rafters, the perks and scary downsides of DIY spray foam, sheathing replacement, and what to do with cupped floor boards.

Join Justin for the first episode of a two-part series in which he interviews friend, Fine Homebuilding ambassador, and building-industry business consultant Shawn Van Dyke. 

Justin, Matt, and Patrick field a follow up question on a particularly frightening rotunda framing job, and discuss options for building a round structure from straight joists. Other topics include preferred shower waterproofing systems and strategies for widening a concrete stoop to support the columns of a new portico roof.

The guys take a deep dive into the options for updating outdated kitchen cabinets before turning to questions on scratched tile and foundation options for a shed on a sloped lot.

GreenBuildingAdvisor.com editor Martin Holladay returns to the show to tackle tough building science questions like heat-pump efficiency at different altitudes, radiant barriers and heat transfer through a roof, and ways to retrofit insulation.