Playground Surfacing Comparison
Pea gravel is one of the most inexpensive surfacing's used in playgrounds as surfacing. It consists of small, clean and rounded particles, it should be installed at minimum depth of 12 inches (30 cm).
Periodic raking and break-up of “hard pan” under surface, needs to be done annually in order for the surfacing to keep its cushioning properties. Also, periodic addition of gravel (“topping up”), annually or at least every 1-2 years. Research shows that fall height and impact directly influence the nature and extent of injuries. Improving playground surfacing and selecting appropriate surfacing are critical to the safety of your equipment.
View the pictures of a local school project. You can quickly see what pea gravel looks like "Before" and "After" roto-tilling.