Garden Design Material Choices for Paving

Natural stone can be very expensive. Many people prefer its aesthetics, and it is the traditional option. However, importing stone from certain areas may raise ethical questions - sustainability of quarrying and child labour to give a couple of examples. 

Stone is often chosen based on porosity - too porous and it will hold water, become slippery and grow slime. You may not be abe to take all suppliers at their word for this measure, unless it has been checked independently.