Buildex® lightweight aggregate can be used to construct vegetated filter strips, rain gardens, rain basins, constructed wetlands and bioswales to treat, and reduce the amount of storm water runoff. The voids within the product provide an environment suitable media for beneficial microbial action storm water filtering. Additionally, it is also used as the underground-layered aggregate filtering fill beneath permeable pavements. Other benefits include:

• Increased surface area with better porosity

• Larger interstitial space and greater water storage

• Improved removal of suspended solids, hydrocarbons, metals, nitrogen and phosphorous