EssentiaLAY 6MIL Vapor Defense is for use when installing floating Waterproof Performance Laminate, Rigid Core SPC, Luxury Vinyl WPC with or without pad attached over concrete substrate and inside restrooms. 
6MIL Vapor Defense comes in single layer (not folded) and is easy to install and comes with built in seam tape. **Per Flooring Industry Standard Installation Guidelines, it is the installer's responsibility to test for moisture from concrete substrate before installing any type of flooring.