Artificial Turf Base Fabric Parameters

Two rolls can look identical on the shelf and fail at completely different rates on the field. The difference usually hides in the artificial turf backing fabric, the layer that locks each tuft and drains each storm. Specifying that layer wrong is how a low quote becomes a full tear-out.

The backing is a two-part system: a woven primary cloth that holds the yarn, and a coated secondary layer that binds it for life. Coating weight, hole spacing, and tuft-bind strength decide whether the turf survives a wet winter or peels at the seams. We verify coating weight at our own bench before each roll ships, so the number on the spec sheet matches the roll in the container.

What the Base Fabric Actually Does

The pile you see is the showroom. The base fabric is the structure. Every blade is punched through a primary cloth and locked by a coating underneath, and that hidden sandwich takes one hundred percent of the mechanical load. The artificial turf backing fabric is where the product either earns its life or loses it.

When a contractor reports tufts popping out after one winter, the failure rarely starts in the yarn. It starts at the backing, where coating weight fell below the level the traffic demanded. A four-metre roll in a school corridor needs far more bind than a display roll sitting in a showroom.

Think of the base fabric as the foundation of a building. A thin slab costs less up front and fails first under load. The same logic applies to artificial turf, where the backing carries the entire lifespan even when no test certificate is attached to the roll. The role of the backing is described in the general reference on artificial turf, which outlines the layered construction.

Primary and Secondary Backing Layers

A modern artificial turf backing fabric has two distinct layers, and confusing them is the most common sourcing mistake. The primary backing is the woven sheet the needles punch the yarn through during tufting. It sets the gauge and holds the loop in place the instant the needle withdraws.

The secondary backing is the coated layer applied after tufting, which glues every loop in place and resists water. Polyurethane and latex dominate this layer, with PU gaining share wherever dimensional stability matters most. A weak secondary coat is the silent cause of edge curl and seam peel.

Below is the simplest way to separate the two when you read a data sheet. The primary layer is measured in grams per square metre of cloth; the secondary layer is measured in coating weight per square metre of binder. Keep both numbers on the same line when you compare suppliers.

PP Plus Net Versus PU Backing

Two artificial turf backing fabric builds lead the export market, and our plant runs both. The PP plus Net build pairs a polypropylene primary cloth with a reinforcing non-woven net before coating. The PU build uses a polyurethane coating as the binding and sealing layer instead. Each suits a different job.

The PP plus Net option suits landscape and most commercial rolls where cost per square metre drives the bid. The PU option wins where water exposure and seam stress are highest, because polyurethane holds its dimension through freeze-thaw cycles. A rooftop terrace in a cold climate is a textbook PU case.

Neither is universally better. A distributor who stocks both can match the backing to the job instead of forcing every project onto one cloth. That flexibility is why we keep both lines on the floor, and why our commercial artificial grass range lists both builds openly.

Coating Weight and Tuft Bind Strength

Coating weight is the single number that predicts tuft survival. It is the mass of binder applied per square metre of backing, and it ranges widely across the market. A thin coat saves a few cents per metre and costs the whole roll when blades shed.

A light coat around 600 grams per square metre holds a decorative roll that nobody walks on. A heavy coat above 1000 grams per square metre is typical where boots, carts, and studs concentrate load on a few square metres. The jump between those two numbers is the difference between a lawn and a field.

Tuft bind is the force needed to pull a single blade out, measured in Newtons. A roll rated below 20 Newtons will shed blades on a busy pitch; a roll above 30 Newtons keeps its face through a full season of play. We record this value at our bench on every production lot, not just on the sample.

Permeability and Drainage Hole Spacing

Water has to leave the roll faster than it arrives, or the base turns to a pond. Permeability is the rate at which the backing fabric passes water, and it is the difference between a usable field and a closed one after rain. A backing that traps water also traps odour and bacteria at the seams.

Most rolls rely on perforated holes punched during the final production stage. Spacing matters: holes every 10 centimetres drain a downpour, while holes every 20 centimetres can back up under the same storm and leave surface pooling. The extra holes cost nothing and save the season. For wet, high-traffic surfaces see our sports artificial grass range where drainage is specified up front.

A facility manager who specifies the wrong spacing learns the lesson on the first heavy weekend. The fix is not more holes but the right holes for the local rainfall, paired with a base that drains beneath the backing. Read the rainfall chart before you read the price list.

Backing Thickness and Dimensional Stability

Thickness and stability decide whether the roll lies flat on day one and stays flat through the seasons. A backing that stretches during install never recovers, and the seams telegraph the error for the life of the job. Stability is bought at the coating stage, not the laying stage.

Three checks catch the unstable backing before it reaches the site. Run them on the sample, not on the full container, because the cost of rejection rises tenfold once the roll is glued down. A supplier who refuses a sample is telling you the backing will not pass the test.

• Measure backing thickness; a stable PP plus Net cloth sits near 1.2 millimetres after coating.
• Pull opposing corners; a stable roll returns to shape instead of staying stretched.
• Soak a sample overnight and dry it; a stable backing shows no curl at the edges.

How Backing Is Made in Eight Steps

Every roll follows the same eight-stage route from raw pellet to finished carpet. The backing is shaped in the middle of that route, where coating and drying lock the structure. Knowing the order helps you ask the right question at the right gate.

Compounding blends the resin, extruding forms the yarn, and twisting sets the fibre. Tufting punches the yarn through the primary cloth, which is the moment the backing first appears. From there the secondary coat is what turns a punched sheet into a finished product.

1. Compounding — resin and additives blended into pellet.
2. Extruding — pellet drawn into yarn filament.
3. Twisting — filaments spun into a usable thread.
4. Tufting — yarn punched through primary backing cloth.
5. Coating — secondary layer bonded to lock tufts.
6. Drying — coating cured at controlled temperature.
7. Perforating — drainage holes punched across the roll.
8. Rolling Up — finished carpet wound to 25-metre length.

The coating and drying stages are where most backing quality is won or lost. A line that cures too fast traps solvent; a line that coats too thin loses tuft bind. Our plant controls both before the roll reaches the winder, which is the only point that protects the number on your spec sheet.

Reading a Backing Specification Sheet

An artificial turf backing fabric spec sheet looks dense until you know the five lines that matter. Read coating weight, tuft bind, hole spacing, backing weight, and total thickness in that order. The first three decide performance; the last two decide handling and fit.

If a supplier omits coating weight, ask for it in writing before you order. A missing number is a missing guarantee, and the cheapest roll is the one that hides its weakest layer. Request an exact quote that lists each backing parameter against your traffic plan, not a single per-metre figure.

Match the sheet to the job, not to the price. A school corridor and a rooftop terrace load the same square metre differently, and the backing that fits one will fail the other. The spec sheet is the only document that survives the handover intact.

Common Backing Failures to Avoid

Most backing failures trace to three repeatable mistakes, and all three show up after the roll is already installed. Catching them on paper saves the tear-out and the reputation that goes with it. The pattern is always the same: a number was skipped to win the bid.

The first mistake is buying on price per square metre alone. A roll quoted low often carried a thinner coating, and the savings vanish when the blade loss forces a re-lay inside two seasons. The second is ignoring hole spacing against local rain, which turns a usable field into a closed one.

The third is skipping the sample stretch test. All three turn a smooth handover into a claims dispute that no certificate line can settle after the glue has set. Ask for the five backing numbers before you sign, and the dispute never starts.

Choosing the Right Backing for Your Project

Choose the backing by the load, not by the catalogue photo. Decorative landscape rolls earn their keep with a standard PP plus Net cloth and a moderate coat. Busy commercial and sports surfaces justify the PU build and the heavier binder that keeps the face intact.

If the project sits in a wet climate or carries carts and studs, step up the coating weight before you step up the pile height. The backing, not the blade, is what survives the winter. A taller pile on a thin coat is a cosmetic win and a structural loss.

As a factory-direct supplier, we can sample and quote to your spec, so the backing you approve is the backing that ships. For decorative scenarios our residential artificial grass options show where a moderate coat is enough.

Frequently Asked Questions