This is one of the most important steps in the renovation process.  Make sure your seed is receiving enough water to germinate but not too much that it drowns.  We reccomend at least 2 times per day 10-15 min. on rotor heads and 5-7 min on spray heads.  Continue this watering until seed has germinated and you have a good stand of new grass.  Switch watering over to once a day, around mid-day, everyday.  Except on days when you mow, not to damage new grass.   Keep this process up until you have mowed your new grass 2-3 times.