Red Seal Floorcovering Installer Practice Exam

The function of a gypsum board underlayment is primarily to provide a smooth and level surface for the final floor covering while also enhancing moisture resistance. Gypsum board is known for its smooth surface, which helps in achieving a uniform installation of various types of flooring, such as tiles or vinyl. Additionally, it contributes to moisture resistance, which is particularly important in areas where exposure to moisture is a concern. This property helps in minimizing the risk of mold and mildew growth, ensuring better longevity and performance of the floor covering installed above it. Thus, utilizing a gypsum board underlayment effectively helps in preparing the subfloor in a way that promotes a durable and aesthetically pleasing flooring finish.