Mono-pitched roof
![Mono-pitched addition to a house with a dual-pitched roof](/Images/godic/202501/28/Skillion-sketch4530.gif")
A mono-pitched roof is a single-sloping roof surface, often not attached to another roof surface. Mono-pitched roofs are sometimes called a pent roof, shed roof, lean-to roof, or skillion roof (in Australia). This is in contrast to a dual-pitched roof, also known as a gabled roof, which is pitched in two different directions.