A patio is an outdoor space generally used for dining or recreation that adjoins a residence and is typically paved. It may refer to a roofless inner courtyard of the sort found in Spanish-style dwellings or a paved area between a residence and a garden.Patios are most commonly constructed from paving slabs (also known aspaving flags). There are two main types of paving slab; concrete or stone. Concrete slabs are cheaper than their natural stone counterparts.This is because the cost of production is far lower. Concrete slabs are produced solely within a manufacturing plant unlike natural stone which is extracted from quarries. As well as paving slabs, patios can also be created using other durable surfaces such as bricks, block paving, tile, concrete, natural paving stones or cobbles.