American Design Drafting Association (ADDA) Certification 2026 – 400 Free Practice Questions to Pass the Exam

The purpose of pressure treatment in wood is primarily to resist termites and decay. This process involves applying preservatives to wood under high pressure, allowing the chemicals to penetrate deeply into the fibers. As a result, treated wood becomes more durable and resistant to various forms of deterioration, including insect infestations and fungal attacks, which are common causes of wood decay. This treatment is especially important for wood used in outdoor applications, such as decks, fences, and posts, where exposure to moisture and pests is prevalent.

Although there are other treatments that might enhance the color, add weight, or provide insulation, those functions are not the main focus of pressure treatment. The primary goal of using pressure-treated wood is to extend its lifespan and maintain its structural integrity in challenging environmental conditions.