HydraNet – Geonet & Geocomposite


Providing lateral transmission of Fluids and gasses

Layfield’s HydraNet™ is a cost-effective and environmentally conscious alternative to aggregate drains for various applications. HydraNet™ can effectively transmit fluids and gasses while taking up much less space compared to a sand, stone, or gravel layer. In double-lined containment applications, HydraNet™ is commonly used to create an interstitial space between two geomembrane liners as part of a leak detection system.

HydraNet™ geocomposites have a geotextile bonded to one or both sides of a geonet. The addition of laminated geotextile layers prevents the movement of soil fines into the drainage path that could otherwise lead to clogging and reduced drainage performance longer term. This geonet is manufactured in North America at our ISO 9001-certified facility.

Why Is Hydranet Unique?

Offers several advantages over traditional drainage systems

These advantages include improved hydraulic performance, increased resistance to clogging, and reduced installation time and costs.

Used in various geotechnical applications

Applications include landfill liners and caps, road and railway construction, slope stabilization, and drainage systems.

Manufactured in our North American Facility

Layfield’s HydraNet™ geonet is made in North America at our ISO 9001-certified facility.

Additional Features

  • High flow under substantial loads
  • Equivalent to about 12″ (300 mm) of aggregate
  • Ideal for drainage on slopes

Biplanar Geonets

Biplanar geonets are synthetic materials used in geotechnical engineering applications. They are manufactured with two layers of ribs oriented at an angle, allowing for improved drainage capacity.

Biplanar Geocomposites

Biplanar geocomposites are comprised of a non-woven needle-punched geotextile laminated on either one or both sides of the geonet to prevent soil particles from clogging the drainage core.

Triplanar geonets

The primary difference between the biplanar and triplanar geonets is the flow capacity and higher compressive resistance. Triplanar geonets are made with two sets of parallel ribs separated by a central rib layer. This structure allows for channelized flow and higher drainage performance. The central ribs are designed to offer higher compressive strengths in challenging applications.


Triplaner Geocomposite HydraNet

Triplanar geocomposites

The 3 layer configuration prevents geotextile protrusion into the drainage core in a triplanar geocomposite, supporting a long-term drainage design solution.

Product Details

Hydranet™ can effectively transmit fluids and gasses while taking up much less space compared to a sand, stone, or gravel layer.


Specification Sheet

HydraNet Biplanar Geocomposite Technical Specification

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Specification Sheet,

HydraNet Triplanar 300 Geocomposite Technical Specification

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Specification Sheet,

HydraNet Triplanar 330 Geocomposite Technical Specification

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Product Specifications

There are complete details on designing with Geo-Nets in the book "Designing with Geosynthetics" by Robert Koerner. This book gives complete information on designing leak detection systems in multiple-liner systems. Your technical representative can help you obtain this book. HydraNet™ is available in several styles to suit different confining pressures and applications. HydraNet™ 220 has high compressive strength and excellent flow properties suitable to most applications. Other series of HydraNet's are also available. Detailed transmissivity charts are available for all HydraNet'sfrom your representative. Interface friction angles for HydraNet are an important side slope stability consideration. Geocomposites and Nets can create a slip plane when they are in contact with some geomembrane materials. It is always recommended that a direct shear box test be performed with all geosynthetic and granular layers proposed or the project before construction. A HydraNet™ should not be used in contact with a Geosynthetic Clay Liner (GCL) as the bentonite in the GCL could migrate into the HydraNet™ under compressive load.

HydraNet™ is manufactured from high-density polyethylene (HDPE), similar to many geomembrane materials. The chemical resistance of HydraNet™ will be similar to our HDPE lining materials. Please see the section on HDPE for further chemical resistance information. Geotextiles used with HydraNets are made from polypropylene and therefore do not have the same chemical resistance and should be checked for compatibility before use.

When placing HydraNet™ with geotextiles, it is often effective to have the geotextile bonded to the HydraNet™ in the factory before installation. A Geo-Net with an attached geotextile is called a geocomposite. Geocomposites usually have a geotextile bonded to one or both sides of a HydraNet™. This creates a drainage structure that can be used between layers of geomembranes, between layers of soil, and in many other situations. The geotextile layers prevent the movement of soil fines into the HydraNet™ drainage path, which could lead to clogging and drainage failure. Woven, non-woven, and heat-bonded geotextiles can be bonded to HydraNets. Please get in touch with your technical representative for the availability of different styles of geocomposite.


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Thu 13
Environmental Containment, Installation and Maintenance

Advanced Geosynthetics for Landfill and Waste Applications

Join Layfield Geosynthetics Rohit Sati, Technical Services Manager — Containment and Enclosure Systems, and Brian Fraser, Vice President – Strategic Business Development, for an educational webinar outlining new industry innovations with geomembranes and geocomposites in waste containment applications. This webinar features the following topics: New Bi-Modal Heatgard® HDPE Geomembranes, HydraNet™ Geocomposite Drainage Products, Geovolt® Conductive Composite for Electrical Leak Detection, and GeoFlex® Geomembranes.

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