Posted: 30/06/2013 at 18:03
Cut it to the ground with a strimmer or mower. Remove all the grass. When it starts to sprout again use glyphosate spray. You may need to do it twice. Leave a good interval between the sprayings so that you can really see where the grass is truly dead.
If you pave over grass that isn't dead you will run into all sorts of problems, one of which is that you can't see if the ground is truly level which it will have to be before paving.
Or you can do it the hard way and after mowing get someone to skim off the turf so you get a level surface.