Moisture Mapping Understanding Acceptable and Bad Moisture Readings

Moisture Mapping: A Comprehensive Guide

Moisture mapping is an indispensable tool for professionals tasked with preserving and maintaining buildings and structures. It enables the identification and mitigation of moisture-related issues, preventing costly damage and ensuring occupant well-being.

Acceptable Moisture Levels

Moisture inevitably exists in buildings, and certain levels are acceptable without posing significant risks. Acceptable moisture levels vary depending on the building’s location, construction materials, and intended use. The following ranges are generally considered acceptable:

  • Wood: 6-12%
  • Concrete: 75-95% relative humidity
  • Drywall: 14-25%

What Is a Bad Moisture Reading?

Moisture readings above acceptable levels indicate potential problems that require immediate attention. The following readings are indicative of problematic moisture levels and warrant further investigation:

  • Wood: >16%
  • Concrete: >95% relative humidity
  • Drywall: >30%

Elevated moisture levels can result from various sources, including:

  • Water leaks
  • Condensation
  • Poor ventilation

Addressing excessive moisture is crucial to maintain the integrity of the building, prevent mold growth, and ensure a healthy indoor environment.