permeable materials

Permeable materials are substances that allow liquids or gases to pass through them. Think of a sponge: it can soak up water because its tiny holes let the liquid move through. In construction and environmental contexts, permeable materials—like certain soils, gravel, or special concrete—are used to help manage water drainage, reduce flooding, and improve groundwater recharge. These materials are essential for sustainable design, as they enable water to infiltrate the ground rather than running off into streets and drains, thus supporting ecosystems and reducing erosion.