How to Apply Infill to Artificial Turf, Step by Step

This page is for DIYers and crews applying infill to new turf or adding infill to an existing lawn. Follow it and you will avoid the most common results of rushed application: buried fibers, bare patches, lumps and infill sitting on top where it tracks indoors.

When should you apply infill?

Infill goes on last, after the turf is laid, seamed, trimmed and nailed or staked at the edges. Applying it before seams are finished makes adjustments much harder, because infilled turf is heavy and grit in seam areas weakens adhesive bonds. See seaming and edging and borders for those steps.

Timing rules:

• Turf and infill must both be dry. Wet fibers grab grains and hold them at the surface, and damp sand clumps in the spreader.
• Pick a calm day. Wind blows fine material around and makes it hard to control quantities.
• Avoid the hottest part of the day in summer. Turf surfaces can get very hot, and you will be on your knees and hands.
• Check the forecast. Heavy rain within hours of application can wash unsettled infill toward low points.

What tools do you need?

Our tools and materials checklist covers the full install kit.

Why use a drop spreader instead of a broadcast spreader?

A drop spreader releases material straight down through a slot in a defined strip, so you can see exactly where it has gone and overlap rows predictably. A broadcast (rotary) spreader throws material in an arc, which is fast but uneven and flings grains onto patios and beds. For infill, the precision of a drop spreader matters more than speed.

Set the spreader's opening small at first. It is easy to add another pass and hard to remove excess. If the opening is too large, the spreader dumps infill in thick lines that bury the fibers.

How to apply infill step by step

1. Calculate the quantity for the whole area and stage the bags around the yard so you are not carrying them across the turf. Our how much infill guide and infill calculator give the numbers.
2. Brush the fibers upright with a power broom or stiff broom against the grain. Upright fibers let infill fall to the base.
3. Divide the area into sections and allocate bags to each, for example 4 bags per 100 sq ft section at 2 lbs per sq ft. This keeps distribution even.
4. First pass: spread roughly a third to half of the section's allocation with the drop spreader in parallel rows, slightly overlapping.
5. Brush in against the grain until the infill disappears below the fiber tips.
6. Second and further passes: spread the next portion perpendicular to the first pass, then brush again. Repeat until the section's allocation is used.
7. Hand-spread edges and corners with a scoop, then brush.
8. Final brush across the whole area in multiple directions to lift fibers and level the infill.
9. Water in with a gentle shower to settle grains and dust.
10. Inspect after the turf dries: part fibers in several spots and confirm infill is at the base and evenly spread.

Layering different infills

If you are using more than one material, for example sand plus zeolite or sand plus a coated or organic top layer, apply the heavier ballast material first in all its passes and brush it in fully. Then add the second material in its own passes. Mixing materials in a spreader tends to separate them by size and weight, producing streaks.

How do you water in infill?

Use a gentle spray rather than a jet, enough to wet the surface and settle fine particles without washing infill into low spots. Watering helps three things: it settles dust, it consolidates the infill around the fiber bases, and it shows you where water ponds, which may indicate a base issue to address early. See testing drainage if water does not disappear quickly.

After watering, let the turf dry fully, then brush once more. A day or two of light use helps the infill settle further; a final brush after a week often lifts any fibers that were pushed down.

What most guides get wrong about applying infill

The common advice is to "spread all the infill and brush it in." In practice, a single heavy pass buries fibers and traps grains in the top of the pile, where it looks sandy and tracks indoors. Brushing cannot reliably move that much material down at once. Thin passes with brushing in between take a bit longer but produce a far more even result and fewer callbacks. Uneven infill is behind many cases of visible seams and patchy appearance.

How do you top up infill on existing turf?

Top-ups follow the same principles at a smaller scale.

1. Clear leaves and debris with a blower on a low setting; see leaves and debris.
2. Rinse pet areas and let the turf dry completely.
3. Brush against the grain to lift fibers.
4. Spread infill in one or two thin passes over thin areas only, usually paths, pet zones and edges.
5. Brush in and water lightly.

A lawn rarely needs an even top-up everywhere. Concentrate on the spots that fail the fiber-exposure check.

Frequently asked questions

Can I spread infill by hand without a spreader?

On small areas under about 100 sq ft, yes. Use a scoop or a coffee can with holes punched in the bottom, shake it over the turf in thin layers, and brush between layers. Hand spreading is slower and less even on larger areas, so a rented or purchased drop spreader is worth it beyond that size.

How long after installing turf can you use it?

You can walk on it immediately after infill is brushed in and watered, though a day of drying is best for a final brush. Keep heavy traffic, furniture and play to a minimum for the first few days while infill settles. Pets can use it once it is watered in and dry, which keeps loose dust off their paws.

Why is infill sitting on top of my turf?

Usually because too much went on in one pass, the turf or infill was damp, or the fibers were not brushed upright first. It can also happen with infill that is too coarse for a dense turf. Let the turf dry, brush vigorously against the grain with a power broom, and remove excess with a vacuum or by sweeping if it still will not settle.

Should I wet the turf before adding infill?

No. Wet fibers trap grains near the surface and wet infill clumps. Apply infill to completely dry turf and water only after brushing it in. The one exception is a light misting after the final brush to settle dust, which is part of watering in rather than preparation.