California Residential Inspector Practice Exam

What type of wall covering is required for both fire resistance and nonabsorbency in shower compartments?

1. Vinyl

2. Tile

3. Nonabsorbent sheet goods

4. Drywall

The correct answer is: Nonabsorbent sheet goods

The requirement for wall coverings in shower compartments focuses on both fire resistance and nonabsorbency to ensure safety and hygiene in wet environments. Nonabsorbent sheet goods are designed specifically for moist conditions, offering a smooth surface that does not allow water to penetrate, which helps to prevent mold and mildew growth. These materials are often made from synthetic substances that resist moisture and provide a barrier against water damage. In addition to being nonabsorbent, these materials can also meet fire-resistance ratings as specified in building codes, making them a suitable choice for areas where fire safety is a concern. Using nonabsorbent sheet goods helps to maintain the integrity of the materials over time while ensuring that they comply with regulations that may apply to dwelling construction. While tile also provides both fire resistance and a nonabsorbent surface, it may require grout lines which can become less effective at preventing moisture infiltration if not properly maintained. Vinyl wall coverings may not provide the same level of fire resistance as required, and drywall, although it is sometimes treated to be moisture-resistant, is generally not suitable for areas that are consistently exposed to water, especially in a shower environment. Thus, nonabsorbent sheet goods emerge as the optimal choice concerning building codes and best practices for