Thatch is a layer of dead turf and living shoots, stems, and roots that develops between the grass and the soil surface. Thatch build up begins when turf produces organic debris faster than it can be broken down by the microbes.
How do I Prevent this?
1. Choose a turf grass type that doesn't produce as much thatch. Perennial Ryegrass and Tall Fescues spread through tillering, not rhizomes and do not produce significant thatch build up.