Laminate flooring requires an underlayment. You get what you pay for when it comes to flooring underlayment. Cheap is not always better. There are several types and price ranges available, and each manufacturer of flooring has a recommendation for the type of underlayment that should be used.he purpose of underlayment is to reduce sound, provide a moisture barrier, aid with subfloor imperfections and slightly cushion the feel of your floor as you walk on it. All of these things must be considered when you purchase your underlayment.