Installing Vinyl Plank Flooring On Concrete. Underlayment isn’t a necessity, but you might consider it to add noise reducing qualities or additional softness to the product. Use carpenter shims or spacers to make a 3/8” expansion gap between the walls and the vinyl flooring.
The first move in installing vinyl plank flooring over concrete is to determine the area that needs to be covered. You need to make sure that the groove of one vinyl plank fits into the tongue of the other vinyl plank securely. Your goal is to create the flattest, smoothest surface possible as the underlayment for the vinyl plank flooring.
Second, you may want an extra vapor barrier above the subfloor to reduce any risk of moisture.
Read more about how to install vinyl plank over tile floors Installing vinyl plank flooring over concrete. That is, it would take 21.39 planks to complete the floor. Concrete may seem very dense, but it is actually full of small pores that will absorb water from the ground.