Wood Destroying Organism (WDO) Home Inspection Practice Exam

What is the moisture content threshold for carpenter ant nests to be associated with wood?

1. 15%

2. 10%

3. 12%

4. 20%

The correct answer is: 15%

The moisture content threshold for carpenter ant nests to be associated with wood is typically around 15%. Carpenter ants prefer to nest in wood that has a higher moisture content, as this environment is more conducive to their survival and the establishment of their colonies. Wood with moisture content below this level tends to be too dry for carpenter ants to thrive and build their nests effectively. Moisture levels at or above 15% indicate an environment that is more susceptible to wood decay, which can also attract carpenter ants, as they are often found in areas where moisture problems exist. Understanding this threshold is critical for effective WDO inspections, as it assists inspectors in identifying potential infestations and areas of concern within a structure. Knowing that carpenter ants are less likely to inhabit sufficiently dry wood helps focus inspection efforts on areas that may present favorable conditions for their activity.