Which of the following is not a characteristic of house wrap?

House wrap is designed to provide a protective layer for buildings, and one of its key characteristics is to allow moisture vapor to escape while preventing water from entering. This functionality is essential in managing the building's moisture levels, helping to prevent mold and rot.

When considering the characteristics of house wrap, it is important to note that it is indeed water-resistant and vapor-permeable. This means it can repel water from the outside while allowing vapor from within the house to escape, maintaining a healthy balance of moisture. Furthermore, house wrap is made from lightweight materials that make it easy to handle and install.

Saying that house wrap is vapor-proof is inaccurate, as the primary function of house wrap is to be vapor permeable rather than vapor proof. Vapor-proof materials do not allow any vapor transmission, which would trap moisture inside the building, potentially leading to issues such as mold growth or structural damage. Therefore, identifying that it is vapor-proof highlights a fundamental misunderstanding of the product's intended purpose and characteristics.