What is a common characteristic of liquid coatings used in construction?

Liquid coatings are often utilized in construction for their ability to provide waterproofing, which makes this option the correct choice. These coatings form a continuous, seamless membrane when applied, effectively sealing surfaces against moisture intrusion. This is particularly important in areas such as roofs, decks, and exterior walls, where water exposure can lead to significant structural damage and mold growth.

The waterproofing capability of liquid coatings is a fundamental reason they are selected for various applications in construction. By preventing water from penetrating materials, they help maintain the integrity of the structure over time. Many liquid coatings are also designed to be flexible, allowing them to accommodate movement in the building materials without cracking, which further enhances their effectiveness in providing waterproofing.

Other options like brittleness, difficulty in inspection, and decorative purposes do not accurately capture the primary benefits and characteristics of liquid coatings used in construction. Specifically, while some coatings may indeed be brittle if improperly formulated or applied, many are designed to be tough and resilient. Likewise, while ease of application can vary and they may sometimes be decorative, the core purpose of many liquid coatings is to provide a waterproof barrier, making option B the most accurate description of their common characteristic.