It's more reseeding than over seeding. Some places the grass survives and others it goes to thatch. Plus moss grows in between in many places. So I have to hard rake, rip out the moss and thatch, then I take a shovel and chop to loosen up the soil, remove clover, leftover moss etc. Then rake all that crap out lol. Then I put down the seed, fertilizer, and cover with a layer of peat moss, followed by EZ straw on top- great stuff btw if you haven't tried it.