Top Dressing and over seeding is the absolute best way to renovate your lawn. Top Dressing is the process of spreading a thin layer mix of top soil and compost or mushroom soil. The layer is about 1/4 to 1/2 inch and is meant to amend the soil of your lawn while letting the existing grass grow through the top dressing material. This will improve soil conditions for your existing lawn while providing a good environment for new seed to germinate.
BENEFITS OF TOP DRESSING