how long does it take to sand floors
Screening, or buffing, the floor will only remove light marks caused by normal wear and tear. Once the floor is screened (lightly sanded) it will be coated with a coat of polyurethane. It usually takes one day to screen and recoat a hardwood floor. Screening will not remove deeper scratches and indentations.
Typically, 24 hours after the last coat is applied your floors should be dry enough to walk on and place furniture on. Even though the floors are dry, it will take the finish about 21 days to fully cure. Wait at least 10 days before you place any area rugs down.