Laminate floors are usually installed as floating floors, which means that they are not attached to the subfloor below. Therefore, before laying laminate floors you have to install underlay. Underlay, must provide adequate cushioning and acoustic effect. Our green acoustic underlay comes also with a vapor barrier. Choose our three in one (cushioning, acoustic, vapor barrier) green acoustic underlay, if you want to get the best value for product quality and features. JU Flooring has been using this underlay for more than 10years, hence you can trust the quality.