Just finished a stacked crown molding project in my living room (16' ceiling) and open hallway (8' ceiling). It's made from stock base molding and 3 5/8" crown molding from Home Depot. I painted the parts first before putting them up and came back to touch up afterward.. Approximately 92'. Glad to be off the ladder. All inside corners were coped except for the sloped ceiling corners. I don't have a good picture of an outside corner or the sloped ceiling corners to post.