When it comes to building a barn, there are all sorts of custom details that you might want to add. Some of the barns style houses you will hear about include Monitor barns. These barns are also called raised center aisle or RCA barns. These barns feature a raised center section that has its gabled roof. The sides of the raised center aisle are often filled with windows to improve the ventilation of the barn structure and increase the amount of natural light inside. Gambrel barn builds feature two different roof pitches, one steep and one shallow. Dutch doors are another popular feature that you will find in barns. These doors are divided up horizontally, allowing for the top half to be opened while the bottom half of the door remains closed. These are a common addition you will find in horse stalls; allowing light and ventilation into a room while keeping the animals inside.