Moisture Readings for Building Maintenance

What should moisture readings be for internal walls?

Moisture readings within building envelopes must be accurately monitored to ensure optimal building performance and occupant health. Monitoring for moisture intrusion is a crucial part of building maintenance.

Common Moisture Sources in Buildings

  • Roof leaks
  • Plumbing leaks
  • Condensation
  • Damp ground
  • Porous building materials

Moisture Reading Interpretation

Moisture readings are typically expressed as a percentage of moisture content compared to the wood’s or building material’s dry weight. Dry building materials typically have readings below 15%, while readings above 20% may indicate a moisture problem requiring attention.

Types of Moisture Meters

  • Pin-type meters: Measure moisture content by inserting pins into the material.
  • Pinless (capacitance) meters: Measure moisture content without damaging the surface.
  • Infrared (IR) cameras: Detect moisture differences based on temperature variations.

Recommended Moisture Readings for Internal Walls

  • Gypsum wallboard (drywall): Below 15%
  • Wood studs: Below 19%
  • Concrete: 75% relative humidity or below
  • Brick: 90% relative humidity or below

Consequences of Excessive Moisture

  • Structural damage
  • Mold growth
  • Health issues
  • Energy inefficiency

Importance of Regular Monitoring

Regular moisture monitoring is essential for identifying and addressing potential moisture issues early on, preventing costly repairs and health hazards.

Conclusion

Accurate moisture readings play a critical role in timely building maintenance and proactive moisture management. By understanding moisture sources, using appropriate meters, and adhering to recommended readings, building owners and managers can ensure a healthy and well-maintained building environment.