Artificial grass is made from plastic fibers stitched into a fabric backing, filled with granular material to weigh it down, and installed over a compacted stone base. The blades themselves are typically polyethylene, polypropylene, or nylon, with polyethylene being the most common choice for residential lawns. But the full system involves several layers working together, each with a specific job.
The Three Plastics Used for Grass Blades
Every blade of artificial grass starts as small plastic pellets that get melted, mixed with color pigments and UV-protective additives, then squeezed through a die (similar to squeezing toothpaste from a tube) to form thin fibers. Those fibers are stretched, cooled, and wound onto large spools. The type of plastic determines how the grass looks, feels, and holds up over time.
Polyethylene is the most popular option and the most realistic-looking. It’s soft underfoot, resists water absorption (so it won’t hold pet odors), and bends naturally without breaking. It strikes a balance between durability and comfort, which is why most residential and general-purpose turf uses it. Its main weakness is a relatively low melting point of around 248 to 266°F, which means reflected sunlight from windows can occasionally damage it.
Polypropylene is the thinnest and softest of the three, but also the least durable. You’ll find it in inexpensive turf mats from big box stores and in products not designed for heavy, long-term use. It resists moisture well and has a higher melting point (320 to 331°F), which is why it’s sometimes used in backing material rather than as the visible blade.
Nylon is the toughest option. Its fibers spring back upright after being stepped on, resist UV fading extremely well, and last the longest. The tradeoff is that nylon absorbs more water, stains easily from things like coffee or wine, and its abrasion resistance actually works against anyone who falls on it, making “turf burn” a real concern. Nylon turf is best suited for commercial spaces, rooftop decks, and backyard putting greens where sliding and tackling aren’t happening.
UV Protection and Color Additives
Bare plastic would fade and become brittle within months of sun exposure. To prevent this, manufacturers mix UV stabilizers into the plastic pellets before extrusion. These stabilizers, known in the plastics industry as HALS (hindered amine light stabilizers), absorb and deactivate UV radiation so the fibers maintain their color and flexibility for years. Color pigments are blended in at the same stage, which is why the green goes all the way through each fiber rather than sitting on the surface like paint.
How Blades Get Attached to Backing
The fiber spools feed into a tufting machine, which works a lot like a giant sewing machine. Needles threaded with yarn punch down through a sheet of backing cloth, pulling loops of fiber through. Knives beneath the backing cut each loop at a precise height to create individual tufts. The spacing and number of tufts per square meter determine how dense and lush the finished product looks.
Most turf products have two backing layers. The primary backing is the woven or non-woven fabric the fibers get tufted into. A secondary backing, usually latex or polyurethane, is applied to the underside to lock the tufts in place and give the whole sheet structural integrity.
How Drainage Works Through the Backing
Water needs to pass through artificial turf quickly, especially during rain or when cleaning up after pets. There are two main approaches to drainage. Conventional backings have holes punched at regular intervals, typically spaced 4 to 6 inches apart. Water has to find its way to the nearest hole, which means areas farther from a hole can temporarily puddle.
Newer fully permeable backings allow water to drain across the entire surface rather than funneling it toward specific holes. These flow-through designs handle hundreds of inches per hour of drainage capacity, resist clogging from infill particles, and eliminate the localized saturation that perforated backings can sometimes cause.
What Goes Between the Blades: Infill
Infill is the granular material spread between the grass blades after installation. It serves multiple purposes: weighing the turf down, supporting the blades in an upright position, cushioning impact, and helping with drainage. The type of infill you choose affects how the turf feels, smells, and handles heat.
- Crumb rubber is made from recycled tires and is the standard on sports fields because of its excellent shock absorption. It gets noticeably hot in direct sun and isn’t ideal for yards with pets.
- Coated sand (Durafill/Envirofill) is acrylic-coated sand with antimicrobial properties, making it a popular choice for pet owners and high-traffic areas. It costs more but lasts well and offers moderate cooling.
- Coconut fiber and cork blends are organic options that provide natural cooling, making them a good fit for playgrounds and humid climates. They may need occasional replenishing.
- Silica sand with cooling coatings (like Hydrochill) absorbs moisture and releases it through evaporation, actively reducing surface temperatures.
- Walnut shells are another organic alternative that stays cooler and appeals to eco-conscious buyers.
The Base Underneath Everything
Artificial turf doesn’t sit directly on soil. A proper installation requires a compacted sub-base, usually 3 to 4 inches of crushed stone or gravel. Crushed stone pieces lock together to form a stable, load-bearing surface that distributes water evenly and prevents erosion. Decomposed granite is another common base material. Fine aggregates like silica sand are often mixed in to fill gaps between larger stones, creating a smooth, flat surface that won’t settle unevenly over time.
How Hot Artificial Grass Gets
One of the most significant material-related drawbacks is heat retention. A systematic review of research on synthetic turf temperatures found that surface temperatures on artificial grass consistently exceed natural grass by a wide margin. On clear, sunny days, the difference can reach 25 to 37°C (roughly 45 to 67°F) hotter than natural grass. Even on overcast days, synthetic surfaces still run 14 to 21°C (about 25 to 38°F) warmer. Air temperature just above the turf surface rises by a smaller but measurable 0.5 to 1.2°C.
This is a direct consequence of the materials involved. Dark-colored plastic and rubber absorb and radiate heat far more than living grass, which cools itself through evaporation. Cooling infills and lighter-colored fibers can help, but they don’t eliminate the difference entirely.
PFAS and Chemical Safety Concerns
Some artificial turf products have contained PFAS, a group of persistent synthetic chemicals used in manufacturing. In 2024, the Synthetic Turf Council told California’s Department of Toxic Substances Control that its member manufacturers were working with suppliers to ensure none of their products contain PFAS-based ingredients by 2025. California is currently testing products to verify whether this shift has actually happened. If PFAS are still found in turf sold in California, regulators plan to move forward with formal regulation.
Recycling Challenges
Artificial turf typically lasts 8 to 15 years before it needs replacing, and disposal has been a persistent problem. The mix of plastics, rubber, sand, and latex backing makes separation difficult. Current recycling technology can effectively separate used turf into its sand, rubber, and plastic components, with the sand and rubber being efficiently recycled. The plastic fibers have been harder to deal with. A European Commission-funded initiative has developed a process to dissolve recovered turf plastic into new resin that can be used to manufacture fresh turf yarn, creating a true circular model. That process has the potential to save an estimated 450,000 tons of CO2 over five years if adopted at scale, but full circularity for artificial turf is still the exception rather than the norm across the industry.