Concrete Underlayment Laminate Floor. If a floor plank and underlayment, or adhesive, will not fit under the door, remove the door and trim it with a circular saw about 1/8 inch above the level of the new flooring. In laminate flooring installations, the underlayment is the thin, flexible sheet of resilient material that is installed on top of a subfloor in order to act as a base for the laminate planks or tiles you're installing. Roberts felt cushion roll laminate flooring underlayment.

In addition, underlayments can provide thermal and sound insulation as well as a cushion that makes walking on the floor more. Fiber/felt underlayment offers the best bang for your buck for thermal properties providing almost 200% more. Underlayment is important because it is a moisture/sound barrier, and cushion support.
Gallery of Concrete Underlayment Laminate Floor
(3.8 cm) thick in one pour and seeks its own level in minutes. Bostik, quickrete, henry, levellite, dap ardex. For concrete basement floors that give off large amounts of moisture it might be worth. Padding can be used with most floating laminate floor.