Building science is the study of how buildings function as complete systems, examining the physics of heat transfer, moisture movement, air flow, and pressure dynamics to understand why buildings succeed or fail at creating healthy indoor environments. Modern structures are complex systems where the building envelope, mechanical systems, and environmental controls must work together seamlessly. When these systems fail or work against each other, the indoor environment becomes uncomfortable, unhealthy, and expensive to maintain. Understanding building science is crucial because environmental problems like persistent odors, moisture issues, uncomfortable temperatures, and poor air quality aren’t random occurrences—they’re symptoms of deeper building science failures that affect how structures interact with the outdoor environment.