Why it matters
Infill is part of the engineered surface, not merely loose sand sprinkled on top. Material type, quantity, installation, replenishment, heat, dust, pets, and warranty instructions deserve review.
How it is used
Landscape systems may use silica sand, coated sand, zeolite-containing blends, or other product-specific materials. Sports and play systems can use different infills designed for their tested performance.
The money question
How can it affect project cost?
Material choice and application rate can change initial and maintenance costs. Specialty claims should be supported by product documentation rather than assumed from a generic label.
Common mistakes
- Skipping infill when the product or warranty requires it
- Assuming every specialty infill eliminates heat or odor
- Using an undocumented quantity
Questions to ask an installer or supplier
- Which infill product and application rate are included?
- What purpose does it serve in this system?
- What maintenance or replenishment does it require?
Sources and review
- Synthetic Turf Council: Guidelines for Essential Elements of Synthetic Turf Systems
- Synthetic Turf Council: Considerations When Buying Synthetic Grass
- Synthetic Turf Council: Glossary of Synthetic Turf Terms
Editorially reviewed July 18, 2026. General educational guidance; verify product claims and site conditions for your project.