I want to replace carpet with hardwood 3/4 oak. There is 5/8 underlayment now with carpet and pad. The top of the stairs already has an oak bullnose with the underlayment behind that. I assume the underlayment would have to come up. The door jambs and trim are now about an inch above the underlayment.The carpet was covering this space before. what is the easiest way to rectify this without taking out the jamb and trim and lowering it to meet the floor?