What Should Moisture Readings Be for Internal Walls?

Moisture readings provide valuable insights into the health of your internal walls. Optimal moisture levels are crucial to prevent structural damage and maintain a comfortable indoor environment. Excess moisture can lead to mold growth, rot, and other issues, while inadequate moisture can result in cracking and reduced durability.

Recommended Moisture Readings

• For internal walls: 10% to 15%

Interpreting Moisture Readings

Readings above or below the recommended range may indicate underlying problems:

• Readings below 10%: Dry conditions, which may lead to cracking and weakening of the wall structure.
• Readings between 15% and 20%: Acceptable moisture level in most cases. Monitoring is recommended to ensure it doesn’t rise significantly.
• Readings above 20%: Excessive moisture, indicating potential water intrusion, leaks, or condensation issues. Immediate investigation and remedial action are required.

Factors Affecting Moisture Readings

Several factors can influence moisture readings in internal walls:

• External moisture sources: Rain, leaking pipes, or flooding can introduce excessive moisture into walls.
• Condensation: Indoor humidity levels above 60% can lead to condensation on cold surfaces, including walls.
• Building materials: Porous materials like plasterboard and wood can absorb and retain moisture more easily than less porous ones like brick or concrete.
• Ventilation: Insufficient airflow can trap moisture within walls, leading to elevated moisture levels.

Accurate Moisture Readings

Accurate moisture readings are essential for reliable assessments. Ensure that:

• Moisture meters are calibrated regularly.
• Multiple readings are taken from different locations to provide a comprehensive picture.
• Readings are compared to industry standards and specific building requirements.