A style of roof having only one slope or pitch, with only one set of rafters that fall from a higher to a lower wall.
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A mono-pitched roof, often referred to as a pent roof, shed roof, lean-to roof , and/or skillion roof (in Australia and New Zealand), is a single-sloped roof surface, often not attached to another roof surface. This is in contrast to a dual-pitched roof, also known as a gabled roof, which is pitched in two different directions.