Wood Destroying Organism (WDO) Home Inspection Practice Exam

What is one key strategy for preventing moisture problems in structural wood?

1. Regularly painting wood surfaces

2. Keeping wood raised above 6 inches from soil

3. Ensuring wood remains damp

4. Covering wood with plastic sheeting

The correct answer is: Keeping wood raised above 6 inches from soil

Keeping wood raised above 6 inches from the soil is an effective strategy for preventing moisture problems in structural wood because it helps to minimize direct contact with moisture sources, such as soil and groundwater. Wood that is in direct contact with soil is more susceptible to absorbing moisture, which can lead to decay and make it an attractive habitat for wood-destroying organisms like termites and fungi. By ensuring a separation of at least 6 inches, air circulation around the wood is improved, allowing for drying and reducing the likelihood of moisture retention. This elevation also protects the wood from insect intrusion and helps maintain its structural integrity over time. In contrast, regularly painting wood surfaces may provide some level of moisture protection but often needs maintenance and may not be sufficient on its own. Ensuring that wood remains damp is counterproductive, as moisture is one of the primary causes of wood deterioration. Covering wood with plastic sheeting can trap moisture, leading to an environment conducive to mold and fungi growth if the wood underneath doesn't dry properly. Thus, the best approach for preventing moisture problems is to maintain that critical distance from soil.