California Residential Inspector Practice Exam

When the underside of wood structural panel roof sheathing is exposed to the outdoors, it is required to be identified as what?

1. Exposure 1

2. Exposure 2

3. Weatherproof

4. Exterior Grade

The correct answer is: Exposure 1

The correct identification for wood structural panel roof sheathing when its underside is exposed to the outdoors is "Exposure 1." This designation indicates that the panel has some degree of resistance to moisture during construction and will withstand reasonable exposure to the elements prior to being covered by roofing materials. It is essential for ensuring the integrity and longevity of the structural sheathing, as it is designed for use in applications where it may be subject to moisture, but not constant wetness. The terminology used in the alternatives reflects various levels of resistance to moisture, but "Exposure 1" is specifically recognized for situations where the wood panel is temporarily exposed. The other terms, while they may refer to different grades or types of wood panels, do not specifically capture the condition and requirements of panels that are exposed to outdoor conditions when the underside is visible. Understanding the correct categorization is vital for compliance with building codes and ensuring the durability of construction materials.