In certain circumstances, it is necessary to install a moisture barrier under engineered wood flooring. Moisture barriers are particularly important when installing flooring over concrete subfloors or in areas with higher moisture levels, such as basements or bathrooms. Concrete subfloors can emit moisture vapour, which, if not properly addressed, can damage the engineered wood flooring. A moisture barrier helps to prevent moisture from reaching the flooring by acting as a barrier between the subfloor and the hardwood. It is crucial to select a moisture barrier that is specifically designed for the purpose and is compatible with the type of subfloor and flooring being installed. Always follow the manufacturer's recommendations and guidelines to ensure proper installation and protection against moisture-related issues.