It is recommended to install vapour barrier under padding
Laminate flooring padding has different functions. Padding serves as sound barrier and thermic barrier. Laminate flooring is very thin so it can become very cold from cold concrete floors if there isn`t any barrier between them for protection. Another function of padding is for correction of imperfections in concrete floors. Underlayment for laminate flooring gives proper wear and stability to laminate. Another barrier that is recommended to install under padding is vapour barrier for protecting laminate flooring from ground moisture.