Construction Supervisor License Practice Exam 2026 – All-in-One Study Guide for Exam Success!

Preservative treatment is crucial for wood used in construction primarily because it protects against pests and decay. Wood is inherently susceptible to damage from various biological threats, including insects such as termites and wood-boring beetles, as well as fungi that cause rot. By applying preservatives, the wood is treated with chemicals that inhibit the growth of these organisms, thereby extending its longevity and structural integrity. This treatment is essential for wood that will be used in environments where moisture and pest exposure are likely, ensuring that it remains durable and safe for construction purposes over time.

In contrast, while improving visual appearance, enhancing load-bearing capacity, and ensuring compatibility with insulation are important considerations in construction, they do not address the fundamental protective purpose that preservative treatment serves.