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Why Does Artificial Grass Need Infill?

Aug 3, 2018 1:22:23 PM / by Cheryl Robertson

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What is Infill?

Infill is added onto artificial grass after installation. It serves many purposes such as: UV protection, added weight, traction, and it provides a structure for artificial turf to keep the grass blades upright. There are many different types of infill, so you need to ensure that you're getting the right infill and the right amount of infill for your artificial turf purpose. For example sports fields will need more infill and a rubberized infill that has more traction than the infill you need for a regular backyard.

Why is Infill necessary in Artificial Grass Installation?

Artificial grass infill serves four primary purposes:

  1. To protect the primary backing from UV exposure: Infill adds an extra layer of protection to the backing of the artificial turf and extends it's longevity. 
  2. To add weight: Artificial grass backing will expand and contract with changes in temperature. Now we already combat this by producing our products with industry leading primary and secondary backings to ensure dimensional stability. However, we also rely on infill as another tool to assist in dealing with expansion. Infill makes the synthetic grass more stable and less responsive to temperature changes. The addition of weight in conjunction with using a sufficient number of nails helps to ensure your artificial grass doesn’t end up with wrinkles.
  3. Increases Traction: This is especially true when using artificial grass for sports fields, children's play areas and around pools. Running on plastic isn't ideal, especially when slightly wet.  Infill provides the grip and traction needed when running on  artificial turf.
  4. Helps keep your Grass Blades upright: Ideally you'll want the top 1/2"-3/4" to be visible, the remainder of the artificial grass is covered in infill.  The infill keeps the blades standing tall even after lots of foot traffic. Because infill ensures the blades stay upright less maintenance is needed - you won't have to constantly brush it to keep the grass from going flat. 


What Type of Infill do you Need?

Envirofill 12-20 greenEnvirofill® is Lazy Lawn's infill of choice. It's an acrylic-coated round sand and it was designed specifically for synthetic grass. It has so many benefits and best of all it can be used for all artificial turf applications - we use it for general lawns and landscaping, playgrounds, sports fields, pet areas and putting greens. We love Envirofill® because it's been proven to be safe and non-toxic, it's clean, keeps odours at bay, it's cooler than other infills, rarely needs to be topped up, has a longer life, and it looks esthetically better. 


silica sandSilica sand is a common infill used for artificial grass, and it's the most affordable option of all infill. It does the job of infill, but it's not perfect.  It compacts more, which can impact drainage, it has to be topped up more frequently, it holds the smell of pet urine, it retains heat, and over time, especially in high traffic areas, it can break down into dust and if inhaled it can cause lung disease. Silica sand is fine for low traffic areas, but we don't recommend it for use in sports fields or in yards that kids play in or yards that are frequented by pets.

zeoliteZeolite is used as an infill for pet turf applications. Zeolite is primarily used as an artificial grass infill for its odour reducing abilities. Zeolite is a negatively charged, honeycomb-shaped molecular structure which absorbs liquids and gases like a magnet to prevent ammonia from forming a gas. (The ammonia buildup in pet urine is what you associate with the smell.) This molecular structure holds the ammonia until the sodium ions found in rain water release the magnetic ability which forces the odor causing bacteria down into the ground ultimately “flushing out” the ammonia smell. 

rubber crumbCrumb rubber is primarily used as an infill in sports fields for its ability to soften the impact on athlete joints, and it’s ability to quickly help compress the grass blade upwards. We would only used this on sports fields or extremely high traffic commercial areas. 

Infill is an absolute must with artificial grass installation - be wary of installation companies that say you don't need it. Lazy Lawn will help you navigate the options and choose the best infill for your synthetic grass installation. 


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Topics: Synthetic grass, Artificial grass infill, artificial grass, Technical information about artificial grass

Cheryl Robertson

Written by Cheryl Robertson