Moisture Mapping A Comprehensive Guide to Detecting and Resolving Dampness

Moisture Mapping and Detection Methods

Moisture mapping is a comprehensive process of identifying and locating sources of moisture infiltration in buildings. It involves a systematic survey using various detection methods to pinpoint areas where water is penetrating the structure.

How to Detect Dampness in a Wall

  • Visual Inspection: Inspect walls for signs of dampness, such as discoloration, peeling paint, or efflorescence (white powdery deposits).
  • Moisture Meter: A moisture meter measures the moisture content in building materials by inserting probes into the surface. Results are displayed as a percentage, indicating the level of moisture present.
  • Infrared Thermography: This method uses an infrared camera to detect thermal anomalies, such as temperature differences between dry and damp areas, which can indicate moisture penetration.
  • Acoustic Leak Detection: A specialized tool emits sound waves through the wall, and when they encounter water or air gaps, they produce distinct sounds that can be detected by trained technicians.
  • Electrical Impedance Tomography (EIT): EIT involves injecting alternating current into the wall and measuring the resulting electrical impedance, which changes in the presence of moisture.