What is Moisture Mapping?

Moisture mapping is a non-destructive technique used to identify and locate areas of moisture within building materials and structures. It is a crucial aspect of building inspection and diagnostics, allowing professionals to assess the extent of moisture damage and determine its potential impact on the building’s integrity, safety, and health.

Detection Methods

Electrical Impedance Tomography (EIT)

EIT is a non-invasive method that utilizes a series of electrodes placed on the surface of the material under examination. These electrodes generate electrical currents that pass through the material. The moisture content can be inferred by measuring the impedance, or resistance, to the flow of electricity.

Capacitance Based

Capacitance-based moisture detectors measure the change in capacitance between conductive plates attached to the material’s surface. As moisture content increases, so does the capacitance, indicating the presence of moisture.

Radio Frequency (RF) Sensing

RF sensors emit electromagnetic waves into the material and measure the amount reflected back. Wet materials tend to absorb more RF energy, leading to a reduced reflection. This difference in absorption is used to determine the moisture content.

Infrared Thermography

Infrared thermography detects differences in temperature caused by moisture. Moist areas appear cooler than dry areas, allowing trained professionals to identify potential sources of moisture intrusion.

How Does Moisture Detection Work?

Moisture detection methods rely on the physical properties of moisture. Moisture content influences the electrical properties, such as impedance and capacitance, as well as the thermal properties of the material. By measuring these properties using appropriate equipment, professionals can determine the presence and approximate amount of moisture within the material.