How infill works

Infill is the engine under your turf. It adds ballast so the surface stays flat, supports fibers so they stand tall, cushions footfall, manages heat, and in pet areas helps control odor. The right material and amount keep performance consistent and maintenance low.

  • Ballast: prevents ripples and creep.
  • Fiber support: reduces matting and traffic lanes.
  • Safety and feel: tunes firmness and play.
  • Heat and odor: specialty infills can reduce surface temperature and absorb ammonia.

Choose the right infill by use case

Landscaping and yards

Pick kiln-dried silica sand in 16/30 or 30/50 mesh, or an acrylic coated sand with antimicrobial or cooling properties. Typical use is 1 to 2 lb per sq ft. Go 2 to 3 lb per sq ft for taller piles or heavy traffic.

Pet areas and kennels

Blend silica with zeolite for odor control. Two solid options:

  • Blend: 1.0 to 1.5 lb per sq ft silica plus 0.5 to 1.5 lb per sq ft zeolite.
  • Zeolite top layer: 1.0 lb per sq ft zeolite over 1.0 to 1.5 lb per sq ft silica.

Rinse regularly and use enzyme cleaners to recharge zeolite and keep the system fresh.

Putting greens

Use clean, dried silica sand 30/50 or 20/40 mesh. Start at 1.0 to 2.0 lb per sq ft and adjust to tune speed and trueness. Do not use rubber in putting surfaces.

Playgrounds

Over a shock pad, use rounded or coated sand for stability and cleanliness. Plan 2 to 3 lb per sq ft unless your certified fall-height system specifies otherwise. TPE or EPDM can be used when a rubberized feel is required by the design.

Sports fields

System-specific mixes of sand and rubber are common. Typical ranges: 3 to 5 lb per sq ft sand plus 6 to 10 lb per sq ft rubber for full-size fields. Always follow the engineered spec for your sport and pad.

How much infill to use

Amount scales with pile height, face weight, and traffic. Use these landscape guidelines, then fine tune to your product data sheet.

  • 1.0 to 1.25 inch pile: 0.5 to 1.0 lb per sq ft.
  • 1.25 to 1.75 inch pile: 1.0 to 2.0 lb per sq ft.
  • 1.75 to 2.25 inch pile: 2.0 to 3.0 lb per sq ft.
  • Over 2.25 inch or heavy-use areas: up to 3.0 lb per sq ft as allowed by the turf spec.

Quick math to order bags

Formula: area in sq ft × target lb per sq ft = total pounds. Bags needed = total pounds ÷ bag weight.

  • Example 1: 500 sq ft lawn at 1.5 lb per sq ft = 750 lb. With 50 lb bags, order 15 bags.
  • Example 2: 300 sq ft pet zone at 1.0 lb per sq ft silica plus 1.0 lb per sq ft zeolite = 600 lb total. With 40 lb bags, order 15 bags.

Application steps

  1. Let the turf relax, seam, and secure it. Groom fibers upright with a stiff broom or power brush.
  2. Use a drop spreader to apply half the infill. Work dry material only.
  3. Broom or power brush against the grain to settle infill into the thatch.
  4. Apply remaining infill in two light passes. Brush again until evenly supported and no infill is visible on top.
  5. Edge cleanly and lightly rinse if using cooling or zeolite infills per product instructions.

Cooling the surface

  • Choose coated cooling sands that absorb and release moisture to cut surface temperature.
  • Lightly mist during hot spells to activate cooling infills.
  • Keep fibers upright by brushing so airflow and shade reach the thatch.

Odor control that works

  • Use zeolite as a blend or top layer. It captures ammonia and keeps pet areas friendly.
  • Rinse and apply enzyme cleaners on a routine schedule to refresh the media.
  • Ensure proper base and drainage so liquids exit fast.

Maintenance schedule

  • Quarterly: brush fibers and check infill levels.
  • Seasonal high-traffic top off: up to 0.5 lb per sq ft as needed.
  • After storms or events: inspect edges and seams, redistribute infill where displaced.

Common mistakes to avoid

  • Using damp or non-dried sand. Always use kiln-dried for smooth flow.
  • Underfilling to save cost. Too little infill leads to matting and uneven wear.
  • Wrong gradation. Avoid very fine play sand that can compact hard.
  • Dumping large piles. Apply in light passes with a spreader for uniformity.

Tools and materials checklist

  • Drop or rotary spreader, stiff broom or power brush, lawn rake.
  • Infill bags: silica 16/30 or 30/50, coated sand, and zeolite for pet areas.
  • Protective eyewear, gloves, and dust mask. Install in dry, calm weather.

Need a spec-true answer for your project

Different products and pads change the target infill. If you want a dialed-in bill of materials that matches your FusionTurf system, we will map it for you fast and clean.