Underlayments are not typically used with solid wood flooring installation. Solid wood flooring is traditionally installed directly on the subfloor, either by nailing it down or gluing it directly to the subfloor. This direct installation method provides stability, and durability, and allows the solid wood flooring to perform optimally. Underlayments, which are commonly used with engineered wood flooring or laminate flooring, are not necessary for solid wood floors. However, it is crucial to properly prepare the subfloor by ensuring it is clean, dry, and level before installation. Addressing any moisture issues and following the manufacturer's recommendations for subfloor requirements will contribute to the longevity and performance of the solid wood flooring.