Wood Destroying Organism (WDO) Home Inspection Practice Exam

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Prepare for the Wood Destroying Organism (WDO) Home Inspection Exam with comprehensive study materials and quizzes. Assess your knowledge on key topics through engaging practice questions and valuable hints. Gain the confidence needed to succeed in your WDO inspection journey!

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Typically made of treated lumber, what is the bottom horizontal member of an exterior wall frame that rests on top of the foundation wall?

Top plate
Window sill plate
Girder
Sill plate

The correct answer is: Sill plate

The bottom horizontal member of an exterior wall frame that rests on top of the foundation wall is referred to as the sill plate. This component is critical in construction as it establishes a stable and level base for the wall framing to be constructed above. Being made of treated lumber is essential for the sill plate because it is in direct contact with the concrete foundation, which can be prone to moisture. Treated lumber is specifically designed to resist decay and insect damage, ensuring the longevity and structural integrity of the wall framing. Understanding the function and importance of the sill plate in the overall structure helps ensure proper construction practices, which are vital for effective home inspections, especially related to wood-destroying organisms that can compromise structural elements.