What is artificial grass infill sand?

A layer of sand is applied over the top of the brushed up artificial grass. It settles to the bottom of the artificial grass blades and sits on the backing. The infill sand doesn’t change the  look of the grass when applied evenly. It won’t make the grass “dirty”, and the sand won’t be transferred to feet when the artificial grass is walked on. It will not blow away as it is down inside of the grass blades.

What does artificial grass infill do?

The infill sand serves a few different purposes. Firstly, the infill sand covers the top of the backing, protecting it from the sun. It reduces sun damage to the backing and stops the backing heating up, reducing the overall temperature of the artificial grass.

The most important feature of infill sand is that it helps to keep the artificial grass blades standing up. The artificial grass fibres are stitched into the backing and lay flat when the artificial grass is first unrolled. By brushing up artificial grass, or when left in the sun, the blades stand up. The infill sand helps support the blades at the backing where they bend, helping it to stay standing and to return to an upright position when walked on. It also makes the artificial grass look more natural as the blades will be kept upright and spread the direction of the blades.

Infill sand also weighs down the artificial grass (around 25kg per 10sqm). Without silica sand, the artificial grass can sound crunchy when walking on the grass. This is the sound of the backing against the cracker dust substrate. Once the artificial grass is weighed down by the infill sand the crunching sound should be eliminated.

Why use kiln-dried silica sand and not regular white wash sand?

The silica sand used as artificial grass infill is very fine, and as it is very dry it settles easily down into the grass when applied in dry conditions. The particles are round and semi-round, as opposed to white washed sand that has particles with sharp irregular edges. This means silica won’t damage or cut the artificial grass blades with friction, such as when it is walked on.

Silica also does not encourage the germination of weeds.

Kiln-dried silica sand doesn’t absorb water which helps with the drainage of water from the artificial grass.


What about artificial grass that doesn’t require infill sand?

As there are different types of artificial grass, some turfs have a curly thatch layer and some don’t. Sports grasses such as on a soccer field have a longer straight yarn and no curly yarn. Sports turf is infilled using a rubber pellet infill which adds cushioning to the grass for use in play.

With the evolution of landscaping artificial grasses over the years to the quality they are now, some suppliers will suggest that turfs that are thick and have a curly thatch layer don’t require infill. While the artificial turf may better stand on it’s own if it is a thick, quality artificial turf, it is always beneficial to add infill sand.


How do you apply the infill sand to the artificial grass?

We sometimes use a large drop spreader to apply the sand effortlessly and evenly to the brushed up grass. As a DIY installation, it is adequate to cut slits in the bottom of the sand bag and move the bag quickly and evenly backwards and forwards over the area.