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Home Build Podcast

Build Podcast | Episode 164: We Need to Talk about Spray Foam

Matt is solo this week for an in-depth discussion on spray foam insulation, focusing on the differences between closed-cell and open-cell foam and the benefits of creating a conditioned attic space. Traditionally, HVAC systems and ductwork are placed in unconditioned attics in the South, leading to energy loss, duct leakage, and humidity issues. By using spray foam insulation at the roofline, homeowners can effectively seal and condition their attic, improving efficiency and reducing moisture problems. Matt highlights Owens Corning Ultra-Pure Natural Polymers closed-cell spray foam as his preferred insulation choice, citing its high R-value (~R7 per inch), low VOC emissions, excellent air sealing, and moisture resistance. Unlike open-cell foam, which can allow vapor to pass through, closed-cell acts as a Class II vapor retarder, preventing moisture accumulation at the roof deck. This is crucial in humid climates where improper insulation can lead to condensation issues, a phenomenon known as "ping pong water" that can cause long-term damage to the roof structure. For humidity control, Matt advises builders to install dehumidifiers or controlled air supply in conditioned attics to maintain proper moisture levels. He also stresses the importance of hiring experienced spray foam contractors, ensuring the correct thickness and installation quality. Another key topic is roof durability and leak prevention. Matt recommends using full peel-and-stick underlayment beneath metal or tile roofs for long-term water protection. He debunks the myth that spray foam prevents leaks, explaining that small, intermittent leaks can go undetected, leading to hidden rot over time. Tune in for everything you need to know (and more!) about spray foam insulation. Thank you to our episode sponsor Aquor Water Systems. Learn more at aquorwatersystems.com.
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Episodes

The Science Behind Air Leakage Testing | Build Show Podcast Ep 214

Matt Risinger explores how diagnostic testing with The Energy Conservatory informs high-performance construction, focusing on blower door testing, pressure mapping, and airflow measurement for airtightness and leakage identification.

Rethinking Insulation for Modern Homes | Build Show Podcast Ep 215

Episode 215    

Matt Risinger Talks Wood Fiber Insulation with Jason Todd of TimberHP </h2> <p style="margin: 0 0 18px; font-size: 16px;"> Matt Risinger talks with Jason Todd of TimberHP about the growing role of wood fiber insulation in high-performance construction. Todd explains how wood-based insulation products fit into modern wall assemblies, offering vapor-open performance, thermal control, and compatibility with airtight building strategies. </p> <p style="margin: 0 0 18px; font-size: 16px;"> The discussion covers manufacturing, supply chain challenges, and how these materials compare to foam and mineral wool in durability and environmental impact. They also touch on prefabrication, evolving building codes, and the shift toward low-carbon materials in residential construction. </p> <p style="margin: 0 0 20px; font-size: 16px;"> <strong>Episode Sponsors:</strong><br><br> <strong>Huber</strong> — <a href="https://www.huberwood.com/" style="color: #c40000; text-decoration: none;">https://www.huberwood.com/</a> &nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp; <strong>Pella</strong> — <a href="https://www.pella.com/" style="color: #c40000; text-decoration: none;">https://www.pella.com/</a> </p> <p style="margin: 0 0 10px; font-size: 16px;"> Watch full episodes of Matt on: </p> <p style="margin: 0 0 6px; font-size: 16px;"> Facebook<br> <a href="https://www.facebook.com/buildshownetwork" style="color: #c40000; text-decoration: none;">https://www.facebook.com/buildshownetwork</a> </p> <p style="margin: 0 0 6px; font-size: 16px;"> Instagram<br> <a href="https://www.instagram.com/risingerbuild/" style="color: #c40000; text-decoration: none;">https://www.instagram.com/risingerbuild/</a> </p> <p style="margin: 0 0 20px; font-size: 16px;"> Build Show Network<br> <a href="https://buildshownetwork.com/go/mattrisinger" style="color: #c40000; text-decoration: none;">https://buildshownetwork.com/go/mattrisinger</a> </p> <p style="margin-top: 24px; font-size: 16px;"> <strong>Don’t miss a single episode of Build Show content.</strong><br> Sign up for our newsletter.

The Tools Behind High-Performance Homes | Build Show Podcast Ep 213

Episode 213    

Matt Risinger talks with Bill Spohn and Eric Kaiser of Tru Tech Tools about how testing, diagnostics, and data-driven tools are transforming modern building performance, from airtightness and airflow to HVAC optimization and construction standards, with support from episode sponsor Pella.

Straw Bale Construction 101 | Build Show Podcast Ep 212

Episode 212    

Jacob Racusin and Matt Risinger discuss the benefits of using straw-based construction for high-performance buildings, focusing on durability, moisture management, and prefabrication. Huber Engineered Woods sponsored the episode.

How Builders Use Blower Door Testing to Improve Airtightness | Build Show Podcast Ep 211

Episode 211    

Matt Risinger and Building Scientist Sam Myers discuss blower door testing for measuring and improving air tightness in residential construction, emphasizing the value of ownership and operation by builders.

The Truth About Tough Clients and How to Spot Them Early | Build Show Podcast Ep 210

Episode 210    

Matt Risinger shares how managing client relationships is key to success in custom home building, highlighting the importance of clear communication, setting expectations early, and recognizing red flags to avoid costly conflicts.

The Origin Series with Bernie Calcote | Build Show Podcast Ep 209

Episode 209    

Matt Risinger interviews Bernie Calcote of Melde Construction about his unconventional journey from musician to CEO, the power of company culture, and building high-end custom homes in Austin’s collaborative construction community.

The Origin Series with Brian Long | Build Show Podcast Ep 208

Episode 208    

The conversation between Matt Risinger and Brian Long provides valuable insights on what it takes to succeed as a builder, emphasizing hard work, integrity, attention to detail, and continuous learning.

A Backup Water System? | Build Show Podcast Ep 207

Episode 207    

Matt Risinger and Chris Christal discuss atmospheric water generation on the Build Show Podcast, highlighting its benefits for water independence and resilience in residential and commercial properties.

Top 5 Risks We Take as Builders | Build Show Podcast Ep 206

Episode 206    

Matt Risinger discusses top risks for custom builders: construction defects, cash flow, contract issues, labor, burnout. Mitigate before costly mistakes.

From World of Concrete | Build Show Podcast Ep 205

Episode 205    

Exciting episode covering innovative concrete products and construction tools from World of Concrete. Essential listen for builders, contractors, architects, and serious DIYers.

The Origin Series with Branson Fustes | Build Show Podcast Ep 204

Episode 204    

Branson Fustes shares his journey in the building industry and discusses the challenges and rewards of running multiple companies in the construction field on the Build Show Podcast.

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