Critical fall height and depth
Playground surfacing is sized to equipment fall height — the highest designated play surface to the protective ground cover. Engineered wood fiber (EWF) and rubber mulch are tested to ASTM F1292 and F2075 standards when labeled for playground use.
Depth is much deeper than landscape beds. A 8-ft fall height may require 9–12 inches of compacted EWF or 6 inches of rubber mulch — check the manufacturer certificate for your product. Landscape bark at 3 inches is not playground-safe.
- Measure fall height from highest walkable surface
- Use only certified playground surfacing products
- Install to compacted depth, not fluffy pile height
- Extend surfacing zone per equipment footprint guidelines
Material choices for residential playsets
Engineered wood fiber knits when compacted and is economical for large zones. Rubber mulch lasts longer, needs less depth, and drains well but costs more per cubic yard and gets hot in direct sun.
Pea gravel and landscape mulch are poor impact surfaces — avoid them under swings and climbing structures. Maintain borders so surfacing does not migrate into lawn.
Volume math for play areas
Play zones are often rectangular fall zones under swings or full use zones around composite structures. Area × depth in feet = cubic feet ÷ 27 = cubic yards.
Example: 20 ft × 15 ft use zone at 9 inches (0.75 ft) depth = 300 × 0.75 = 225 cu ft ≈ 8.3 cubic yards before compaction allowance. Add 10–15% for settle and rake maintenance.
Run your fall zone dimensions through our mulch calculator — enter depth in inches per manufacturer spec, not standard 3-inch landscape depth.