Selecting a geotextile for an artificial turf project involves far more than simply pointing to a gram weight (GSM) on a price list. When I review inquiries from international contractors and distributors, they often assume all base fabrics are the same. But the appropriate specification depends heavily on the site's application, the subgrade condition, the required drainage design, and the expected construction loads.

This guide helps project procurement teams look beyond basic weight classes. We will explain how to evaluate polymer types (PET vs. PP), mechanical properties, hydraulic performance, and roll dimensions to ensure the selected geotextile performs correctly in the field without unnecessarily inflating the landed cost.

What Does Geotextile Do Under Artificial Turf?

Geotextile is not required for every single artificial turf installation. If a contractor is gluing turf directly to a concrete slab or an existing hardened plaza, a geotextile layer is completely unnecessary; a shock pad is usually placed instead. However, if you are building an artificial turf system over a natural dirt subgrade, a geotextile is structurally mandatory.

If you skip the geotextile, the heavy crushed stone base will slowly sink into the wet mud over time, creating surface depressions, pooling water, and a ruined turf field.

When installed beneath artificial turf, a geotextile provides four distinct functions:

وظيفة	Why It Matters in Real Projects
الانفصال	Prevents the compacted mud and natural subgrade soil from churning up and mixing with the clean aggregate base.
الترشيح	Retains the soil particles in place while allowing rainwater and pet urine to pass vertically downward without clogging the stone layer.
حماية	Isolates the sharp edges of the crushed stone base, protecting any softer underlying layers or future top layers from puncture damage.
Weed Suppression	Acts as a physical barrier against weed roots trying to push upward from the soil through the artificial turf drainage holes.

Crucial Installation Order:
A common mistake among inexperienced installers is placing the fabric in the wrong order. The standard installation order over a dirt subgrade must be:

1. Compacted bare soil
2. جغرافية (with a 20–30cm overlap, secured with U-pins)
3. Crushed stone aggregate base (5–10cm, heavily compacted)
4. Fine sand leveling layer
5. Artificial turf

The geotextile must go تحت the crushed stone, not between the stone and the grass. Placing it directly under the turf will block the horizontal drainage channels of the stone base.

Why Nonwoven Geotextile Is Required (Not Woven or Plastic Film)

When selecting the fabric type, buyers must specify a short-fiber or continuous-filament needle-punched nonwoven geotextile.

Woven geotextiles, while possessing very high tensile strength, often have restricted vertical water flow. Woven slit-film fabrics can trap water, causing the turf base to flood during heavy rain. Nonwoven geotextile, by contrast, is highly permeable. It acts like a robust industrial felt filter, ensuring that water drains quickly while the dirt remains firmly separated from the clean stone.

Most importantly, you must never use impermeable plastic film (like standard construction PE film) beneath artificial turf. Plastic film traps moisture, completely prevents natural drainage, and will cause the ground beneath the turf to waterlog, emit foul odors, grow mold, and create surface bubbling. A highly breathable, water-permeable nonwoven geotextile is the only correct choice for a soil base.

PET vs PP Geotextile: Which Material Should You Choose?

Nonwoven geotextiles are primarily manufactured from two polymers: Polyester (PET) and Polypropylene (PP). When buyers ask me which is better, the answer depends entirely on the soil chemistry at the job site and the project budget.

Polyester (PET) Geotextile

PET geotextile is highly common in artificial turf base construction, primarily because it offers excellent mechanical strength at a very competitive cost.

• The Advantages: PET generally has better inherent resistance to UV degradation compared to PP. On real construction sites, geotextiles are often unrolled and left exposed to the sun for a week before the aggregate trucks arrive. PET retains its strength well during this exposure window. At equivalent GSM weights, PET often yields higher tensile strength, better creep resistance, and higher CBR puncture resistance, making it highly suitable for surviving heavy aggregate compaction on sports fields.
• The Fatal Flaw (Risk): PET is highly susceptible to strong alkaline hydrolysis. If your project subgrade consists of high-alkaline soil, limestone backfill, or crushed concrete debris (where the soil pH > 9), placing a PET geotextile into the wet, alkaline earth will cause it to chemically degrade, turn brittle, and snap rapidly. Its lifespan will be severely cut short.

For standard landscaping, residential yards, or sports fields built over neutral or slightly acidic soils (pH 4–9), PET is an excellent, cost-effective choice. As an exporter, when a client orders PET for turf, I always advise them to confirm: "Suitable for neutral soil; avoid high-alkaline sub-soils."

Polypropylene (PP) Geotextile

PP geotextile is the safer, more conservative choice when the ground conditions are completely unknown or hazardous.

• The Advantages: PP is exceptionally resistant to both acids and high-alkaline environments. If the subgrade soil chemistry is unknown, if the project is located near a coastal saline-alkali area, or if it is built over construction debris and limestone backfill, PP is mandatory to ensure long-term burial life without chemical degradation.
• The Disadvantages: PP naturally degrades faster under UV exposure than PET. While manufacturers add UV stabilizers to high-quality PP, it is still crucial that PP geotextiles are covered with the aggregate base as quickly as possible during construction to prevent solar damage. Furthermore, UV-stabilized PP often carries a higher raw material cost than standard PET.

If the project specification does not explicitly demand PP, buyers should evaluate their soil conditions. If the soil is neutral, PET offers superior mechanical performance for a lower budget.

What GSM Geotextile Is Suitable for Artificial Turf?

Gram weight (GSM - mass per unit area) is the most frequently discussed specification in international B2B inquiries. However, GSM alone does not dictate overall performance.

Here is a practical breakdown of typical GSM requirements based on the turf application over natural dirt subgrades:

Application Scenario	Recommended GSM	Practical Consideration for Buyers
Residential Yard / Light Landscape	150 gsm	The standard, most cost-effective choice. Provides adequate weed suppression and puncture resistance against light foot traffic over normal dirt.
Commercial Landscape / Rocky Soil	200 gsm	Stronger tensile and puncture properties. Necessary if the soil contains sharp rocks, aggressive weed roots, or if the area will see higher pedestrian traffic.
Sports Fields / Football Pitches	200–250 gsm	Withstands the heavy dynamic loads of athletes and maintenance vehicles. Highly resistant to crushing forces from the thick, angular aggregate base layer.
Temporary / Very Short-Term Use	120 gsm	Only recommended for temporary event flooring. Fabrics this light are easily torn by aggregate during installation and are not recommended for permanent outdoor burial.
Concrete / Hardened Ground	لا أحد	Geotextile is not required. You can install turf directly, or use a shock pad for cushioning.

A warning against ultra-low weights: Do not use fabrics below 100gsm for permanent outdoor artificial turf. They lack the CBR puncture resistance necessary to survive angular crushed stone placement. A 90gsm fabric will be pierced by sharp stones and weed roots, failing completely within 1 to 2 years.

Buyers must also remember that a higher GSM is not universally better. While a 300gsm fabric is incredibly strong, it increases the total roll weight, reduces the total square meterage that can fit into a 40HC shipping container, and subsequently increases your landed sea freight cost per square meter. Select the GSM that meets the engineering requirement—do not over-specify unnecessarily.

Continuous-Filament vs Short-Fiber Nonwoven Geotextile

In the manufacturing of nonwoven geotextiles, there are two primary methods: short-fiber (staple fiber) needle-punching and continuous-filament spunbond needle-punching. Both are heavily used in the artificial turf industry.

Because continuous-filament fabric is made from unbroken, continuous strands of polymer, it naturally yields higher tensile strength, lower elongation (less stretching), and significantly higher CBR puncture resistance compared to a short-fiber fabric of the exact same weight.

While continuous-filament geotextile is typically slightly more expensive than short-fiber, the price difference is often negligible compared to the increased safety margin it provides against aggregate puncture during heavy machinery compaction. For demanding applications like professional sports fields or commercial areas, continuous-filament is heavily preferred.

However, since the geotextile is permanently buried beneath the stone and not exposed to the elements, a high-quality short-fiber fabric remains a perfectly viable, long-lasting, and highly economical option for most standard landscape and residential turf projects. If both products meet your required project specification, compare the actual TDS performance and landed cost rather than selecting solely by the manufacturing process.

What Technical Specifications Should Buyers Compare?

To shift from buying purely by weight to buying by actual performance, international contractors and distributors must request the manufacturer's Technical Data Sheet (TDS).

When reviewing a TDS for a turf project, these are the critical parameters to evaluate:

مواصفة	Why It Matters During Construction and Use
الكتلة لكل وحدة مساحة (GSM)	Establishes the basic product weight classification for logistics and handling.
قوة الشد (كيلو نيوتن / م)	Dictates the fabric's resistance to pulling and tearing forces when heavy machinery drives over the aggregate base during installation.
مقاومة ثقب CBR (كيلو نيوتن)	Critical for ensuring that sharp, angular crushed stones do not pierce and destroy the separation layer during compaction.
Water Permeability (cm/s)	The fabric's ability to allow heavy rainfall to pass vertically into the subgrade without ponding and flooding the turf above.
AOS (Apparent Opening Size)	Determines filtration compatibility. The pores must be small enough to block soil from rising, but large enough not to clog with fine silt.
Polymer Type	Indicates chemical resistance (PET for neutral soil; PP for alkaline soil).

It is important to remember that a 200gsm geotextile from Factory A will not have the identical tensile, puncture, or hydraulic performance as a 200gsm geotextile from Factory B. The manufacturing equipment and raw material quality make a massive difference. By comparing these specific TDS values, you ensure the fabric actually meets the demands of your job site.

How to Select Geotextile by Artificial Turf Application

Instead of guessing a GSM weight, professional buyers determine the fabric specification based on the specific demands of the project application.

• Sports Fields: The main requirement is construction durability and aggressive filtration. The field must drain rapidly, and the base must not deform under athletic loads. Focus on high CBR puncture resistance (often 200–250gsm) and excellent water permeability. A PET continuous-filament fabric is ideal here if the soil chemistry is neutral.
• Commercial Landscape: The priority is reliable separation and weed suppression across large areas. A standard 200gsm nonwoven fabric provides the necessary toughness to handle commercial landscape maintenance while keeping material costs controlled.
• Residential Playground / Backyard: The focus is basic separation and cost-efficiency over standard dirt. A standard 150gsm short-fiber nonwoven fabric is usually more than sufficient to separate the soil from the aggregate and allow pet urine and rain to drain efficiently.

Your application determines what performance parameters you need—not automatically what GSM you need.

How Roll Size Affects Artificial Turf Project Cost

This is a critical consideration for international B2B buyers that is rarely discussed. The lowest EXW (Ex Works) factory price per square meter does not always produce the lowest landed cost at your destination port.

Logistics and handling play a massive role in geotextile procurement.

Roll Width: A wider roll (e.g., 4m to 6m wide) means fewer seams on the field, which reduces overlap material waste and significantly speeds up contractor installation time. However, very wide rolls dictate how the material must be loaded into the shipping container, and they require heavy equipment to move on site.

Roll Length: Longer rolls reduce handling time and container dead space, but they increase the physical weight of each individual roll. If your installation team is working by hand in residential backyards, a massive, heavy roll will be impossible to maneuver.

Container Optimization: A heavier GSM means fewer square meters can fit into a 40HC container. If you arbitrarily specify 300gsm when a 200gsm fabric is perfectly adequate for your soil, your shipping cost per square meter increases significantly because you are shipping heavier, bulkier rolls with less total coverage area.

What Information Should You Send When Requesting a Geotextile Quote?

To receive a fast, accurate, and optimized quotation, buyers should avoid simply sending an email that says, "What is the price for 200gsm fabric?" A professional supplier cannot give you an optimized landed price with that little information.

Instead, provide the following details in your inquiry:

• Application: (e.g., Professional football field base, commercial landscape, residential distribution).
• Total Area: Estimated project square meterage or expected purchasing volume.
• Subgrade Condition: Is the soil neutral, or is it highly alkaline/limestone? (This dictates whether we quote PET or PP).
• Required Specifications: If you have a BOQ or technical drawing specifying tensile strength (kN/m) or puncture resistance (kN), provide it immediately.
• Destination Port: Required for calculating optimized sea freight and container loading layouts.

If you do not have a formal specification sheet from an engineer, provide the turf application and subgrade condition first. This allows the factory to recommend the safest, most cost-effective option for your specific scenario.

خاتمة

Selecting a geotextile for artificial turf should never be based on GSM alone. A successful purchase requires understanding the subgrade chemistry to choose between PET and PP, evaluating CBR puncture resistance to survive aggregate compaction, and ensuring you are using a fully permeable nonwoven fabric rather than an impermeable plastic film.

By analyzing the project application, the required mechanical functions, and container loading efficiency, international buyers can secure the correct material while minimizing their total landed cost. If you have a project BOQ, a technical drawing, or simply know your subgrade condition and total area, send us your details for a tailored material recommendation and an optimized quotation.