This course provides an in-depth look at the critical role firestop materials play in maintaining fire-resistance-rated assemblies and achieving code-compliant installations. Participants will explore the wide range of firestop products, how they are tested within listed systems, and why visual inspection requires more than just surface-level observation. Designed for inspectors, AHJs, contractors, and design professionals, the session emphasizes the importance of proper documentation, substrate preparation, and awareness of common installation errors that can compromise life safety.