Moisture Mapping and Detection Methods

Identifying sources of moisture intrusion in a building envelope can be challenging. Moisture mapping techniques provide invaluable insights by locating and quantifying moisture levels, enabling targeted repairs and remediation.

How Does Moisture Mapping Work?

Moisture mapping involves using specialized equipment to measure the electrical impedance of building materials. When moisture is present, it increases the impedance, altering the electrical properties of the material.

By scanning surfaces with moisture meters, calibrated to detect subtle changes in impedance, areas of elevated moisture or leaks can be identified. Moisture maps are then produced, depicting the moisture distribution, severity, and potential source of intrusion.

Types of Moisture Mapping Methods

• Capacitance-Based Moisture Meters: Utilize a parallel plate capacitor to measure impedance. Capacitance increases with moisture content.
• Impedance-Based Moisture Meters: Measure the total impedance of a material using two-point or four-point electrical probes.
• Infrared Thermography: Uses infrared cameras to detect variations in surface temperature, which can indicate areas of moisture accumulation.

Moisture mapping is an essential tool for building professionals. By pinpointing moisture sources, it facilitates prompt and effective repairs, preventing costly damage and enhancing building durability.