ICC Permit Technician Practice Exam

Which characteristics describe naturally durable wood?

1. Fire retardant and warp resistant

2. Decay resistant and termite resistant

3. Both fire and warp resistant

4. Only termite resistant

The correct answer is: Decay resistant and termite resistant

Naturally durable wood is characterized by its ability to resist decay and damage from insects, particularly termites. This resistance is a result of the natural properties of certain wood species that protect them from deterioration when exposed to moisture and insect activity. Wood species such as cedar, redwood, and cypress have compounds that make them less appealing to pests and more resilient against rot. This durability is particularly beneficial in environments where wood is used in outdoor applications or in areas with high moisture levels, reducing the need for chemical treatments or preservatives. While other options mention fire retardance and warping, these characteristics are not part of what defines naturally durable wood. Fire resistance often requires specific treatments or the use of certain materials designed for that purpose, while warp resistance is related to the wood's physical properties under varying environmental conditions. Thus, these factors do not contribute to the classification of wood as naturally durable, emphasizing the significance of decay and termite resistance as key traits.