Disadvantages of Non
Limitations of Non-Invasive Methods
Non-destructive moisture tests, such as infrared thermography and microwave moisture detection, are often preferred for their non-invasive nature. However, they come with certain limitations:
- Limited Penetration Depth: Non-destructive methods typically measure surface moisture only, which may not provide accurate readings in thicker walls or in cases where moisture is located deeper within the structure.
- Environmental Interference: External factors such as temperature, humidity, and surface conditions can interfere with readings, affecting their accuracy.
- Insufficient Detail: Non-destructive tests lack precision and cannot provide detailed information about the extent and location of moisture intrusion.
- False Positives: These methods can sometimes detect non-moisture-related issues, such as thermal bridges or variations in wall materials.
- High Cost: Non-destructive moisture testing equipment can be expensive, making it less accessible for some users.
How to Do Moisture Tests on Walls?
To conduct accurate moisture testing, it is recommended to use invasive methods that provide direct access to the wall’s interior:
- Moisture Meters: Pin-type or probe-type moisture meters measure moisture content at specific locations, providing precise readings.
- Relative Humidity Sensors: Hygrometers or moisture probes placed within the wall cavity monitor relative humidity levels over time.
- Coating Adhesion Tests: A non-destructive but invasive method involving applying a coating to the wall surface. Adhesion issues can indicate underlying moisture problems.