How to Troubleshoot Humidity Issues Step by Step

Humidity—the concentration of water vapor in the air—is the silent force driving many of a building's biggest problems. It dictates comfort, influences energy costs, and, critically, controls the growth of mold, mildew, and other biological contaminants. For the homeowner, building manager, or technician, humidity is a constant, year-round challenge.
This book, How to Troubleshoot Humidity Issues Step by Step, is designed to demystify this critical subject. It moves beyond simply treating the symptoms of high or low humidity (such as condensation or dry air) and provides a structured, systematic process for identifying and resolving the root cause. We will translate the science of psychrometrics into practical, actionable steps using readily available tools.
You will learn to differentiate between moisture entering from the outside (infiltration), moisture generated from within (sources), and failures in the mechanical systems designed to control it (HVAC and ventilation). By the end of this guide, you will be equipped to perform a comprehensive humidity audit and implement permanent solutions, transforming your approach from reactive maintenance to proactive moisture management.