Dethatching and Overseeding
Dethatching is a lawn renovation process necessary due to excessive thatch build-up. Thatch is a loose, intermingled organic layer of dead and living stems, shoots and roots that develops between the zone of green vegetation and the soil surface. When thatch exceeds 3/4", it becomes difficult for water, air and nutrients to penetrate the matting of dead grass plants. The excessive thatch layer creates an environment ideal for disease and insects to breed and live, which ultimately causes the decline of your lawn.
Overseeding will promote new grass growth after the removal of thatch leaves some lawn areas thin.