Infill is the quiet workhorse of every synthetic lawn, and it is the step most DIY installers rush or skip. Get it right and the turf stands tall, stays cool underfoot, and lies flat. This guide explains how much infill your artificial grass installation needs, which type to use, and the technique for spreading it perfectly evenly.
What Infill Actually Does
Infill is the granular material brushed down into the base of the pile. It is not filler; it does real structural work.
- Ballast: its weight holds the turf flat and resists wrinkling and movement.
- Blade support: it props the fibers upright so the lawn looks full instead of matted.
- Backing protection: it shields the backing from UV and helps the whole system last.
- Temperature and feel: a proper infill gives the lawn a natural, cushioned feel underfoot.
Choosing the Right Infill
Silica Sand
Rounded silica sand is the most common general-purpose infill. It is economical, drains well, and supports the pile effectively for lawns and landscape areas.
Coated or Antimicrobial Sand
Sand with a durable coating resists compaction and can help with odor and cleanliness, which makes it popular for family and pet areas.
Zeolite for Pet Areas
Zeolite is a mineral granule prized for capturing ammonia from pet urine, reducing odor. It is often used together with sand where dogs will use the lawn heavily.
How Much Infill Do You Need?
Application rate depends mostly on pile height. Taller pile needs more infill to fill the deeper canopy and keep the blades standing.
- A common range is roughly 1 to 2 pounds per square foot, with taller pile toward the higher end.
- Short pile and installs on concrete often need less; deep, luxury pile needs more.
- Your turf manufacturer's installation spec gives the exact rate for that product, and it governs the warranty, so treat it as the final word.
To estimate your total, multiply your lawn area by the target rate. Order a little extra so you never run short mid-application.
Step-by-Step: Spreading Infill Evenly
Even coverage is the whole game. Dumping infill in piles and dragging it around leads to heavy patches and bare spots.
- Wait for a dry day. Damp sand clumps and will not flow through a spreader or fall to the base of the pile.
- Brush the pile fully upright first, so the fibers are open and ready to receive the infill.
- Load a drop spreader and apply the infill in light, even passes, rather than one heavy dump. Two or three thin passes beat a single thick one every time.
- After each pass, brush the infill down into the base of the pile with a stiff broom or power brush, working against the grain.
- Repeat until you reach the target rate and the infill sits low in the canopy, invisible from standing height.
- Do a final brush to stand the blades up and even out the surface.
Safety note: dry sand infill can release fine dust. Wear a dust mask and eye protection while spreading and brushing, and work with the wind at your back where possible.
Signs You Got It Right, or Wrong
- Right: the pile stands upright, the lawn feels firm but cushioned, and you cannot see loose sand sitting on top.
- Too little: the blades flatten quickly underfoot and the turf feels loose or shifts.
- Too much: gritty sand sits visible on the surface and the lawn feels sandy rather than grassy.
- Uneven: some areas mat down while others stand tall, a telltale sign of pile-and-drag application.
Keeping Infill Levels Right Over the Years
Infill is not entirely a one-time job. Over the life of an artificial grass installation, some infill naturally migrates in high-traffic lanes, on slopes, and after heavy storms, so a periodic check keeps the pile supported and the lawn looking full.
- Every season or two, part the pile in busy areas and confirm the infill still sits near the base of the blades.
- If the fibers are starting to flatten or the backing feels exposed, add a light top-up of the same infill.
- Brush the fresh infill down on a dry day so it settles evenly rather than sitting on top.
This small habit is one of the easiest ways to extend the life and appearance of any artificial grass installation. Well-maintained infill keeps the blades upright, protects the backing from UV, and preserves the natural feel underfoot that made you choose an artificial grass installation in the first place.
Frequently Asked Questions
Can I skip infill entirely?
It is not advisable for most lawns. Without infill the blades mat down, the turf can wrinkle, and the backing is more exposed to UV. Some specialty non-infill turfs exist, but for standard landscape turf, infill is part of the design.
Will infill wash away in the rain?
Properly brushed-in infill settles at the base of the pile and stays put through normal rain. You may need to top it up occasionally over the years, especially in high-traffic areas or on slopes where some migration is natural.
What infill is best for dogs?
Many pet owners combine silica sand with zeolite, which captures ammonia and helps control odor. Pair the right infill with good drainage below the turf, and rinse the lawn periodically to keep it fresh.
Need Help Dialing In Your Lawn?
The right infill, applied evenly, is what makes a synthetic lawn feel finished and last for years. If you would like guidance on the best infill for your yard or pets, see our services or get a free quote. Call 877-692-5349 for a free consultation.