California Residential Inspector Practice Exam

What is the minimum required thickness of portland cement parging on exterior foundation walls that require damp proofing?

1. 1/4 inch

2. 3/8 inch

3. 1/2 inch

4. 5/8 inch

The correct answer is: 3/8 inch

The minimum required thickness of portland cement parging on exterior foundation walls that need damp proofing is established based on industry standards and building codes. A thickness of 3/8 inch is sufficient to provide the necessary barrier to moisture while ensuring good adhesion and structural integrity of the parging material. Parging serves not only as a protective layer over the foundation but also contributes to the aesthetic appearance of the building. When applied at this minimum thickness, it ensures an effective damp-proofing layer, preventing water from penetrating through the foundation walls. Choosing a thickness less than 3/8 inch may compromise the effectiveness of the damp proofing, leaving foundations vulnerable to moisture intrusion and potential damage. Thus, adhering to the 3/8 inch specification is essential for optimal performance and compliance with relevant building codes regarding damp proofing applications.