Thatch is predominently the build-up of dead and decaying root systems. Thatch can be so dense and impenetrable that it can deny water to the root system. Once thatch gets to over a half inch in thickness it is a serious problem. Power raking is a quick and very laborious way to remove thatch, which can also result to damage to the turf. The better answer lies in Core Aeration.
Aeration is a slow process to remove thatch, which stimulates microbial activity.
Microbes feed on the thatch, eventually converting it back to top soil. Aeration is a natural process of revitalizing your soil below your lawn, and allowing your turf to take maximum benefit of water and nutrient up-take. It is the single best thing for your lawn. Contact a lawn professional to book an aeration. Choose a company who stands behind their work with a full guarantee of satisfaction and will ensure the job is done correctly.