The Build Show Podcast
We Need to Talk about Spray Foam
Feb 21, 2025
Dive into the world of spray foam insulation, where closed-cell and open-cell types take center stage. Discover how closed-cell insulation can transform attics into conditioned spaces, enhancing energy efficiency and preventing moisture issues. Learn about the crucial role of low VOC emissions and high R-values in ensuring a healthy home. Matt shares tips on humidity control and the significance of skilled installation for long-lasting results, along with strategies for enhancing roof durability and leak prevention.
31:52
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Quick takeaways
- Closed-cell spray foam insulation significantly enhances energy efficiency by acting as a vapor retarder, crucial for moisture management in conditioned attics.
- Effective humidity control combined with proper installation can prevent moisture-related structural issues, emphasizing the importance of hiring experienced contractors for spray foam applications.
Deep dives
Understanding Closed Cell Spray Foam
Closed cell spray foam offers superior insulation properties that make it an excellent choice for use in conditioned attics. This type of foam serves as a vapor retarder, which is particularly beneficial in managing moisture, ensuring that humidity does not accumulate within the roof sheathing. Its high R-value, approximately R7.2 per inch, provides effective thermal resistance, thereby significantly enhancing energy efficiency. Additionally, the application of closed cell spray foam reduces the potential for moisture-related issues, as it prevents vapor movement, making it ideal for varying climates, especially for builders in both northern and southern regions.
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