Shed roof

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.

Single-pitched “outshot” or “catslide” addition to a structure with a gable roof

An outshot or catslide roof is a pitched extension of a main roof similar to a lean-to but an extension of the upper roof. Some Saltbox homes were created by the addition of such a roof, often at a shallower pitch than the original roof.


Modern single-pitched roofs in northern Australia

A single-pitched roof can be a smaller addition to an existing roof, known in some areas as a lean-to roof.

Single-pitched roofs are used beneath clerestory windows.

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.

See also

  • List of roof shapes


  1. Cowan, Henry J., and Peter R. Smith. Dictionary of Architectural and Building Technology. 4th ed. London: Spon Press, 2004. Print. ISBN 0415312345
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