In this episode, Reuben Saltzman and Tessa are joined by Tom Harris, who discusses the importance of a clean surface before spraying spray foam and compares it to preparing a surface for house paint. He also explains the need for adhesion testing and the different surface preparation requirements for various materials. Tom emphasizes the significance of surface temperature and how it affects the application of spray foam. He delves into the concept of high-lift foam and its benefits, as well as the considerations and challenges associated with spraying multiple layers. Tom also highlights the changing mindset of contractors, who are now more focused on doing the job right and seeking knowledge. Lastly, he shares his thoughts on DIY froth packs and their limitations. The conversation covers different types of spray foam technology, the importance of isolation and ventilation during installation, off-gassing and odor control, and the proper application and mixing of spray foam.TakeawaysA clean surface is crucial before spraying spray foam, similar to preparing a surface for house paint.Adhesion testing is important to ensure proper bonding between the foam and the substrate.Surface temperature plays a significant role in the application of spray foam, and different formulations are available for different temperature ranges.The high-lift foam allows for thicker passes of spray foam, reducing the need for multiple layers and increasing productivity.Contractors are increasingly focused on doing the job right and seeking knowledge to improve their skills and understanding of spray foam insulation. There are different types of spray foam technology, including plural component and single component foam.Isolation and ventilation are crucial during spray foam installation to control odors and airborne contaminants.Proper application and mixing of spray foam are essential to prevent issues such as thermal degradation and off-gassing.Consulting with experts and following manufacturer guidelines is important for ensuring the successful installation of spray foam.Chapters00:00 Introduction and Recap00:58 Importance of a Clean Surface04:08 Adhesion Testing07:30 Surface Temperature and Application10:02 Adjusting Chemistry for Different Temperatures15:11 Spraying Multiple Layers and High Lift Foam23:05 Density Distribution and Shrinkage28:11 Contractors' Quest for Knowledge29:35 DIY Froth Packs30:32 Different Types of Spray Foam Technology33:36 Importance of Isolation and Ventilation38:13 Off-Gassing and Odor Control42:56 Proper Application and Mixing of Spray Foam

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