Applying a moisture barrier is a critical step in hardwood floor installation, as it protects the planks from damaging subfloor moisture. For concrete slabs, a plastic sheeting vapor barrier is essential to prevent upward moisture migration. For wooden subfloors, a felt or foam underlayment with an integrated moisture barrier is typically used. This crucial layer prevents warping, cupping, and mold growth, ensuring the long-term stability and beauty of your investment. #HardwoodFlooring #Moistur