SNW40 White Non-Woven Geotextile Membrane 300gsm

SNW40 is a heavy duty non-woven geotextile membrane manufactured using a superior needle-punched process to deliver high tensile strength and exceptional puncture resistance. At 300gsm, it sits at the upper end of the non-woven range and is designed for applications where standard membranes are at risk of damage during installation or service.

In the ground, SNW40 provides effective separation by preventing fine soils migrating into aggregate layers while maintaining consistent water flow through the fabric. This helps preserve bearing capacity, drainage performance and surface stability over time. The needle-punched construction gives the membrane high flexibility and elongation, allowing it to accommodate ground movement and loading without tearing.

SNW40 is commonly specified in demanding applications such as horse arenas, paddocks and turnout areas, where repeated loading and wet conditions place stress on the sub-base. It is also used beneath driveways, access roads and road construction layers, as well as for trench lining, French drains and soakaway or attenuation tank wrapping where high puncture resistance is critical.

Due to its thickness and strength, SNW40 is well suited to installations involving angular aggregates, construction traffic or weak sub-grades. It is often selected where lighter 200gsm membranes would be borderline or where long-term durability is a priority.

Install SNW40 on a prepared sub-grade free from sharp protrusions. Adjacent sheets should be overlapped by a minimum of 300mm, increasing on soft or uneven ground. The membrane should be covered promptly with aggregate to avoid damage during construction.

• Very heavy duty 300gsm non-woven geotextile membrane
• Superior needle-punched construction for high puncture resistance
• Suitable for equestrian, driveways and road construction
• Maintains separation and filtration under high loads
• Performs well with angular aggregates and weak sub-grades
  Supplied in wide rolls for efficient large area coverage

Manufactured from polypropylene fibres using a superior needle-punched non-woven process. This construction provides high strength, flexibility and resistance to installation damage.

Product grade: SNW40
Fabric type: Superior needle-punched non-woven geotextile
Polymer: Polypropylene
Colour: White
Mass per unit area: 300 gsm
Tensile strength MD / CMD: 22 / 22 kN per metre
Tensile elongation MD / CMD: 50 / 55 percent
CBR puncture resistance: 4000 N
Dynamic cone drop: 12 mm
Water permeability normal to plane (VIH50): 60 litres per m² per second
Water flow in plane @20kPa: 3.0 × 10⁻⁶ m²/s
Characteristic opening size O90: 90 microns
Thickness at 2kPa: 2.4 mm
Roll width: 5.25 m
Roll length: 100 m
Roll coverage: 525 m²