There are three ways you can lay a grass carpet onto cemented floors or flat surfaces. The First is loose lay, by laying the carpet directly on the floor. The Second, is you can glue the carpet with flooring adhesive directly on the base of the floor. Just make sure that the surface is free of dust and debris that might stick on the adhesive. The Third is to lay a layer of drainage cell onto the floor and glue the grass carpet onto the drainage cell.