Playground Wood Fiber Calculator

Playground Wood Fiber Calculator

Planning a safe playground starts with the right amount of protective surfacing. While 9 inches is the minimum required depth for engineered wood fiber (EWF), a 12-inch depth is recommended to account for natural compaction and displacement over time.

 Why 12 Inches?

Loose-fill materials compress approximately 25% over time due to regular use and weather conditions. For example, if you install 12 inches of wood fiber, it will likely settle to about 9 inches after compaction. This settlement ensures your playground maintains the minimum safety requirements even after normal wear.

Calculate Your Wood Fiber Needs

To determine the amount of engineered wood fiber needed for your playground:

1. Measure your playground area (length × width in feet)

2. Use the recommended depth of 12 inches (1 foot)

3. Enter the values in the calculator.

Fall Height Protection

  • 9-inch minimum depth protects falls up to 8 feet
  • 12-inch depth can protect falls up to 12 feet

Maintenance Tips

  • Install wear mats in high-traffic areas like swing exits and slide landings
  • Regularly rake and redistribute material
  • Check depth frequently and add material as needed
  • Consider marking equipment supports with minimum fill levels

Installation Requirements

  • Never install over concrete or asphalt surfaces
  • Ensure proper drainage to prevent material compaction
  • Extend surfacing at least 6 feet beyond equipment in all directions
  • Consider installing a drainage system or gravel base layer separated by fabric

The calculator above will help you determine the exact amount of engineered wood fiber needed for your project, ensuring your playground meets safety standards while accounting for natural material compression over time.