Moisture mapping is a non-destructive technique used to detect moisture in buildings and other structures. It is a valuable tool for homeowners, property managers, and building professionals to identify and address moisture problems before they cause significant damage. ### Moisture Mapping and Detection Methods There are several methods used for moisture mapping, including: - **Infrared thermography:** This method uses an infrared camera to detect temperature differences on surfaces. Areas with higher moisture content will typically be cooler than surrounding areas. - **Electrical impedance tomography:** This method measures the electrical resistance of a material. Moisture content can affect the electrical resistance, making it a useful indicator of moisture levels. - **Microwave moisture meter:** This device sends microwave signals into a material. The amount of microwaves that are absorbed is proportional to the moisture content. - **Probes:** Probes can be inserted into materials to measure moisture content directly. They are commonly used for investigating moisture levels in crawlspaces and under floors. ### How to Check for Moisture Under Your House If you suspect there may be moisture under your house, there are several steps you can take to check: - **Inspect the crawlspace or basement:** Look for signs of moisture, such as water stains, mold, or mildew. - **Check the foundation:** Look for cracks or gaps in the foundation that could allow moisture to seep in. - **Use a moisture meter:** If you find any areas that are visibly damp, use a moisture meter to measure the moisture content of the material. If you determine that there is moisture under your house, it is important to contact a qualified professional to identify the source of the moisture and find a solution to prevent further damage.