A thin lawn can sometimes be a hard turf repair.
Visit http://www.grassstitcher.com/Thin_Lawn_Areas.html to learn how the brand new Grass Stitcher make this task real very easy. All you need to do is fill in the sparse areas, without wiping out the existing grass blades. Most people cover up every thing with topsoil and start over or dig everything up and start over; you just don't need to do that much work. The Grass Stitcher can perforate between the grass blades to plant grass seed easily and quickly so the grass blades connect with each other for a dense thick lawn only using turf seed and the Grass Stitcher.