There are two slopes are coming down from a central ridge instead of two.
Gambrel roof. Gambrel roofs were a very popular style in traditional dutch architecture which is why you might associate this roofline with an old barn. A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof. Gambrel roofs are symmetrical with two slopes on each side of the roof. If you plan on building and installing your own gambrel roof you ll have to draw out plans first to determine the proper dimensions.
The gambrel roof is like that with one difference. This design is sometimes called a dutch swedish german french english or new england roof. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. Most designs are symmetrical providing the advantages of a sloped roof while still maximizing the amount of space inside of the building.
A gambrel roof is one that has two sides to it. Each sloping side of the roof is broken into two halves. A gambrel roof is a popular roof style on many contemporary barns and sheds. Each one offers a shallower slope that sits above a steeper one.
Home with an intricate roof design that includes a gambrel design along with other roof styles such as gable. A gambrel or gambrel roof is a usually symmetrical two sided roof with two slopes on each side.