What Type of Sand is Best for Artificial Grass Infill?

Sand infil

Artificial grass has become a popular choice for New Zealand homes, schools, and commercial spaces thanks to its low maintenance, year-round greenery, and durable performance. But one part of the installation process often gets overlooked: the infill. The type of sand you use plays a major role in how your synthetic turf looks, feels, and performs over time.

If you’re preparing for a new turf installation or refreshing an existing one, choosing the right infill is essential for longevity, safety, and overall appearance. This guide breaks down the different types of sand commonly used for turf, their pros and cons, and how to apply infill correctly to achieve the best possible results.

What Is Infill and Why Does It Matter?

Infill refers to the sand or other material added on top of synthetic turf blades once installation is complete. It settles into the fibres, helping the turf stand upright and remain stable underfoot.

Infill has several key functions:

  • Adds weight to keep the turf securely in place

  • Supports fibre structure and prevents flattening

  • Improves drainage by keeping the backing open

  • Reduces heat through better airflow between fibres

  • Protects the base layer from wear

  • Enhances shock absorption for safer play

Even high-quality turf needs the correct infill to perform as intended.

Types of Sand Used for Artificial Grass Infill

Below are the most common types of sand used in NZ installations and what you should know about each.

1. Washed Silica Sand (Most Popular Choice)

Washed silica sand is the most widely recommended infill option for residential and light-commercial turf in New Zealand.

Why it works well

  • Fine and evenly graded

  • Does not compact easily

  • Allows excellent drainage

  • Supports turf fibres effectively

  • Affordable and easy to source

Best used for

  • Backyards

  • Play areas

  • Landscaping projects

  • General home installations

Potential drawbacks

  • Some low-quality silica can include dust—washed varieties reduce this risk.

  • Not suitable for high-impact sports fields that require shock-pad systems.

2. Kiln-Dried Sand

Kiln-dried sand is a super-dry, extremely fine sand used in more specialised applications. Because it flows easily, it’s ideal for installations requiring very precise infill distribution.

Best features

  • Extremely fine

  • Perfect for brushing deep into dense fibres

  • Great for small areas or tricky installations

Best used for

  • Putting greens

  • Dense, short-pile turf

  • Small courtyards

Potential drawbacks

  • More expensive than standard silica

  • Too light for some installations—can shift without enough brushing

3. Zeolite (Alternative Odour-Control Infill)

Zeolite is not a sand, but a natural mineral often used as an alternative infill—particularly in homes with dogs.

Why consider it?

  • Absorbs odours

  • Neutralises ammonia from pet urine

  • Aids in cooling the turf surface

Best used for

  • Homes with pets

  • Small lawn areas

Potential drawbacks

  • More expensive than silica

  • Requires topping up more often

  • Works best when combined with sand rather than replacing it entirely

4. Crumb Rubber (For High-Performance Sports Turf)

Commonly used in stadiums and multi-sport facilities, crumb rubber provides superior shock absorption.

Advantages

  • Excellent impact cushioning

  • Ideal for football and rugby fields

  • Adds significant weight to keep turf stable

Disadvantages

  • Gets hot in direct sun

  • Not aesthetically suited to landscaping

  • Can migrate into surrounding areas

This option is mostly reserved for professional sports applications.

What Is the Best Sand to Use?

For most NZ homeowners and general landscaping projects, washed silica sand is the top recommendation due to its stability, cost-effectiveness, and compatibility with all major turf brands.

This is why, in most residential installations, installers regularly choose best sand for artificial grass as an infill option that meets both performance and aesthetic requirements.

How Much Sand Do You Need?

The amount of infill depends on:

  • Turf pile height

  • Density

  • Intended usage

  • Ground conditions

As a general guide:

  • Landscaping turf: 8–12 kg per m²

  • Putting greens: 16–20 kg per m²

  • Sports turf: Depends on code requirements (often significantly more)

Professional installers will calculate these amounts during your site assessment.

How to Apply Sand Infill Properly

Applying infill correctly is just as important as choosing the right material.

1. Spread Evenly

Use a drop spreader or shovel to distribute sand uniformly across the turf surface.

2. Brush Between Layers

After each light layer of sand, brush the turf using a stiff broom or power broom to help fibres stand up and ensure even distribution.

3. Avoid Dumping Sand in One Spot

Uneven piles can create dips or hard patches.

4. Rinse Lightly

A soft hose spray helps settle the sand deeper into the fibres.

5. Repeat as Needed

Apply additional layers until you achieve the recommended depth for your turf product.

How to Maintain Infill Over Time

While synthetic turf is low maintenance, infill levels can lower over several years due to:

  • Foot traffic

  • Weather

  • Pets

  • Cleaning routines

Maintenance steps

  • Brush turf fibres every 1–3 months

  • Add fresh infill where fibres begin to flatten

  • Inspect high-traffic zones regularly

Well-maintained infill extends the life of your turf and keeps it looking lush.

Conclusion

Choosing the right sand infill is crucial to the performance and longevity of artificial grass. Washed silica sand remains the most reliable option for most New Zealand homes, offering excellent drainage, stability, and value. Kiln-dried sand, zeolite, and crumb rubber also have their place — but they suit specific installations or performance needs.

With the correct infill and proper application, your synthetic turf will stay upright, clean, and resilient for many years.

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