WALS 5 Gallon Bag 20mm Radon Rock
WALS 5 Gallon Bag 20mm Radon Rock is also known as 20mm Drainage Rocks or Radon stone. Radon rock is tan-grey in color. It is most commonly used for foundation,basement, backfill, drainage and roofing. Radon Rock are used undersides of building foundations. These are a naturally occurring material that are used in construction and landscaping.