![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Smith_Tobacco_Barn%2C_Dillon_vicinity%2C_Dillon_County_%28South_Carolina%29.jpg/220px-Smith_Tobacco_Barn%2C_Dillon_vicinity%2C_Dillon_County_%28South_Carolina%29.jpg)
A shed roof, also known variously as a pent roof, lean-to roof, outshot, catslide, skillion roof (in Australia and New Zealand), and, rarely, a mono-pitched roof,[1] is a single-pitched roof surface. This is in contrast to a dual- or multiple-pitched roof.
Applications
![](https://upload.wikimedia.org/wikipedia/commons/thumb/9/95/Skillion-sketch.gif/220px-Skillion-sketch.gif)
A single-pitched roof can be a smaller addition to an existing roof, known in some areas as a lean-to roof, and a "outshot", "catslide", or skillion roof in others.
Some Saltbox homes were expanded by the addition of such a roof, often at a shallower pitch than the original roof.
Single-pitched roofs are used beneath clerestory windows.
![](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Modern-skillion-roofs.jpg/220px-Modern-skillion-roofs.jpg)
One or more single-pitched roofs can be used for aesthetic consideration(s).
A form of single-pitched roof with multiple roof surfaces is the sawtooth roof.
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