Environmental Factors Affecting Moisture Readings
Moisture readings are measurements of the moisture content within materials, such as wood or concrete. Their accuracy is crucial for assessing the health and safety of a building. Environmental factors can significantly influence these readings.
Temperature and Relative Humidity
- Temperature: Higher temperatures increase evaporation, lowering moisture content.
- Relative humidity: Higher humidity levels provide moisture to materials, increasing their moisture content.
Air Circulation
- Adequate air circulation helps remove excess moisture, lowering readings.
- Stagnant air allows moisture to accumulate, potentially leading to higher readings.
Sunlight
- Sunlight can heat materials, increasing evaporation and reducing moisture content.
- In humid environments, sunlight can actually increase moisture readings by drawing moisture from the air into materials.
Building Materials
- Porous materials (e.g., wood) absorb moisture more readily, resulting in higher readings.
- Non-porous materials (e.g., concrete) resist moisture absorption, yielding lower readings.
What Should Moisture Readings be for Internal Walls?
For internal walls in a temperate climate:
- Wood: Less than 20%
- Plasterboard: Less than 15%
- Concrete: Less than 10%
It’s important to note that these values may vary depending on local climate and specific building conditions. Consult a qualified professional for accurate moisture assessments and recommendations.