Answer: You'll want to dig into the bare spots to loosen the soil and then rake it level with the rest of the lawn area; overseed and then sprinkle a light coating of peat moss over the top of the seeds to help keep them moist. They should germinate in 7-10 days if kept moist.
If you're setting new sod, prepare the soil the same way and press the sod into the bare spots to make good soil to root contact. Water frequently enough to keep the sod from drying out.
Best wishes with your renovation project!
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