Patios are typically made of Concrete or stone slabs laid over a firm base. This base is often formed of a layer of compacted hardcore (stone chips), a layer of sharp sand, and a layer of Cement mortar. The firmness and stability of the base is essential to the robustness of the top layer of slabs - an infirm base will typically result in cracked slabs. Patios that hold a lot of weight, such as driveways, require stronger Foundations than those that are designed for light use.
Patio gardening is often based around the use of large Clay pots.
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