Moisture Mapping Understanding Acceptable Moisture Levels

Introduction

Moisture mapping is a process used to identify and measure moisture content within a building or structure. This information can be essential for evaluating the health and durability of a building, as excessive moisture can lead to damage and discomfort.

Acceptable Moisture Levels

Acceptable moisture levels vary depending on the material and location within a building. In general, however, the following ranges are considered acceptable:

  • Wood: 6-12%
  • Concrete: 2-4%
  • Masonry: 4-8%

These ranges can vary slightly based on factors such as climate and building age.

What is an Acceptable Damp Reading?

Damp readings are used to measure moisture content in a non-destructive manner. Acceptable damp readings vary depending on the specific instrument being used, but generally readings below 75% relative humidity (RH) are considered acceptable.

If damp readings exceed acceptable levels, further investigation is typically warranted to identify the source of the moisture and determine the appropriate remediation measures.