LEANTO
Lean-to
A lean-to is a roof with a single slope or a structure built using a lean-to roof. One type of structure is free standing with only three walls and a sloping roof. The open side is commonly oriented away from the prevailing winds and rains. Often it is a rough structure made of logs or unfinished wood and used as a camping shelter. Temporary structures made from wood or textiles are also termed lean-tos if constructed with a single slope of the roof. In some cases the sloping roof extends all the way to the ground. Thus the roof itself forms one of the three walls.The above text is a snippet from Wikipedia: Lean-to
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