Remove old soil which is most likely to be ridden with weeds that can harm the new lawn in the long run. Remove stones and other debris to avoid any punctures to the weed barrier that is to be installed. Lay down a weed barrier sheet covering the entire area. This ensures that your lawn is free of weeds and thus less maintenance is required. Weed barriers are porous and allow water to flow through the membrane easily. Add fresh topsoil. Levelling of topsoil. Give some time for the topsoil to settle (1-2 weeks). Raking for a better fit of the turf. Lay down turf.