I am looking to try out a new method of returfing for an upcoming job and was looking for some advice before I start.
Up until now I have generally skimmed off the old lawn, either by hand or using a turf cutter, before rotavating and laying new turf. The system that I have heard of (and what I want to try out) is to spray the old lawn with weed killer a couple of weeks beforehand and then simply rotavating the dead lawn and raking out any unwanted material.
I did try this once before using Roundup but, despite a good covering with a concentrated mix (at the correct time) it barely touched the grass.
Please can someone advise the best weed killer to use and the process to follow?