Terrafix Geosynthetics Inc.

North America’s leader of Complete Geosynthetic Solutions
Since its inception in 1973, Terrafix® products and solutions have been extensively used by public and private industries around the world. From engineering to construction, our team of experienced professionals are committed to providing the most advanced engineered solutions to our client’s challenges. Whether you’re installing roads, pipelines, sewers, safety fences or looking for a storm water solution, Terrafix® can help.



Terrafix’s Geotextiles are defined by four basic functions:


Filtration functions to restrict the migration of fine soil particles from a soil mass while remaining permeable to water movement greater than, or at least equivalent to the permeability of the protected soil.


Water is conveyed along the path of the geotextile due to its construction, and then to an outlet. Water may be vertically or horizontally conveyed. Drainage is related to the role of filtration, and is a function of the permeability of a geotextile and its pore opening size or porometry.


Separation is the function which prevents two distinct soils of different materials from intermixing. The key factors for a geotextile to satisfy this function are porometry, toughness and strength.


This function involves the stabilization of a soil mass by provision of tensile strength to the soil-fabric system.

Geotextile selection can be expressed as a relationship between these 4 basic functions and the properties required by the design engineer in order to satisfy certain criteria, which would relate to a specific application.

Terrafix Geotextiles Product Brochure
Technical Information

Erosion & Sediment Control

Erosion and sediment control techniques are practices that are designed to protect an exposed soil surface, to prevent or reduce the release of sediment to environmentally sensitive areas, and to promote re-vegetation as soon as possible. Terrafix® offers a wide range of products to assist with any erosion and sediment control issues.

Complete Product Brochure

Coir Mats & Logs

terrafix® Coir Mats and Coir Logs are made of pure coconut husk fiber-100% natural, organic, biodegradable and safe to wildlife. Coir Mats are more flexible than matting made from bristle coir fiber. This characteristic allows Coir Mats to interface with the soil surface.

Coir fiber is durable and strong, with the right properties for being spun and woven into the right strength mat.

Coir Mats and Logs are used for slope and channel stabilization, stream and river bank stabilization, wetland construction, dams, detention ponds, highway and rail embankments, mining operations and landfills, ski slopes and ski lift tracks, pipelines, high altitude planting reservoirs and construction sites.

Features and Technical Information

Erosion Control Blankets

Erosion control blankets provide a mechanically stabilized form of immediate cover, functioning as a barrier against both the detachment and transportation phase of erosion process until vegetation or reinforced vegetation assume this function.
Erosion control blankets are used to prevent surface erosion and accelerate the establishment of vegetation. Typically, blankets are intended for Slope protection, channel and ditch linings, reservoir embankments and spillways, culvert inlets and outfalls, and dikes, levees and riverbanks.
Features, Specifications and Technical Information


Envirobags are a cost effective solution for dewatering applications.
• Filter water when working in sensitive areas
• Easy to use
• Minimal maintenance
Terrafix® Envirobags are designed to contain silt, sand and other fines while allowing water to
filter out. Compared to other techniques, Envirobags offer superior performance in the protection of wetlands. Terrax® Envirobags are
made of durable nonwoven geotextiles that are UV stabilized and also resistant to puncture
and tearing. During filling it is important to monitor the Envirobag, and be sure to avoid
overfilling as it could lead to rupturing of the Envirobag.


Terrafix Fencing Solutions:
Terrafence is specifically designed to control soil migration from construction sites, therefore, preventing contamination of adjacent sites
such as streams, parking lots, streets and other sensitive areas. Terrafence is a preassembled sediment control structure designed with
environmental concerns in mind. Terrafence fabric is made of woven polypropylene fibres which have been treated to resist degradation
caused by exposure to sunlight. Terrafence fabric is a high strength geotextile that does not require additional reinforcing nets or other support systems.

Wire Backed Silt Fence is an alternative to the classic and very popular silt fence, the wire backed addition allows for a supplementary layer of silt control. The wire meshing provides a more rugged and reliable fencing option, while still being affordable and low maintenance for use around construction sites, road work, and other job locations. Wire backed silt fencing efficiently protects storm water drainage systems from polluting with silt, and will protect against environmental liability due to silt leaving project sites.

Safety Fence: Wire Farm Fence, Wooden Snow Fence, Utility Safety Fence, and Diamond Smooth Fence


Terrafix Flexamat® is a permanent erosion control mat utilized for stabilizing slopes, channels, low water crossing, inlet/outlet protection, and shorelines. It consists of concrete blocks (165mm x 165mm with a 57mm profile)
embedded into a high strength geogrid. There is 38mm spacing between the blocks that gives the mat flexibility and allows vegetation growth. Flexamat® should be considered in any application where consideration is being
given to poured concrete, riprap, gabions, ACB’s and other hard-armor systems.


FLEXICRETE® is a system of solid concrete blocks connected together to form continuous inter-connected areas which can be used for a variety of purposes such as embankment protection, open storm drain lining, aqueduct lining, shore and beach protection, pond lining support, paving, roads, parking areas etc.

Gabion Baskets

Gabion baskets are wire mesh containers made from double twisted, hexagonal woven wire mesh. Once assembled, the baskets are filled on site with durable stone in order to create flexible, permeable, monolithic structures.
Gabion structures are able to develop and integrate with the surrounding environment, permitting the preservation or restoration of the natural environment.

The filtering capability of the rock fill allows the soil, water, air, and plant life to interact naturally. Plant life can be developed even quicker by designing steps between each vertical layer creating planting shelves. As gabions provide a completely natural look, they have also used by architects as decorative elements of the landscape.

Meter Bags

Meter bags can be used as a temporary dam to enclose a work area and permit the removal of water. Meter bags have 4 lifting hoops sewn directly into each corner seam, which are also sewn together with the main body fabric for extra strength. They are made of high strength woven polypropelene. They can be filled with any on site material or sand.
Meter bags allow work to be carried out in a dry area and they are faster and easier to work with than sand bags.

Mud Mats

Mud mats are a revolutionary way to keep you out of the mud. Unroll this amazing new product and drive on any muddy, swampy ground without getting stuck, rutting or tracking mud off site. Mud Mats consist of pocketed, double-wall, high-strength fabric with high tensile reinforcing ribs confined within each sleeve which allows for easy deployment and amazing structural stability.

Mud Mats can be used in construction site access, agriculture, golf & parks, other soft or sensitive ground condition areas where vehicle access is required.

With these Mud Mats ground pressure from vehicle tires is reduced up to 40x causing minimal ground disturbance! Mats can connected together to form custom sizes.
Mat size is 8′ x 15″, weight is approx. 90 lbs


SHORESOX™ is the most innovative bio-engineered “living system” developed to immediately halt soil erosion and stabilize shorelines and hillsides.

Its unique design operates in balance with the principles of physics and the unwavering laws of nature.

SHORESOX™ is the only erosion control solution that encompasses the shore bank and fully integrates into the bank or hillside – ultimately becoming part of the earth.

SHORESOX™ can solve a multitude of soil erosion problems including:

• Shoreline stabilization

• Hillside stabilization

• Sod restoration

Silt Curtains

Terrafix® Silt Curtains are designed to deflect and contain sediment within a designated area. Manufactured from high strength geotextiles and fabricated to a variety of sizes.

Silt Curtains are used to provide protection for a watercourse from land disturbance or from dredging or filling within the watercourse. Placed in a water body, they minimize sediment migration from a disturbed area by enclosing the area of work.

Terrafix® Silt Curtains are manufactured from high strength geotextiles and water proof membranes, fabricated to a variety of sizes.

Fabricated with a pocket sewn along the entire top edge so as to contain the flotation and load line within the pocket. A pocket is also sewn along the entire bottom edge so as to contain the ballast. Silt Curtains are provided in custom made sizes to meet project requirements. Silt Curtains can be joined to provide a continuous run by overlapping and threading them together with rope through grommets or batten strips. Terrafix® offers a wide selection of woven, nonwoven and composite geotextiles for silt curtain fabrication.


SILTSACK® is a simple and cost-effective solution to prevent clogging of catch basins. SILTSACK® is a sediment control device used to prevent silt and sediment from entering your drainage system.

SILTSACK® traps the silt / sediment but allows water to pass into the sewer. SILTSACK® can be used as a primary or secondary sediment control device to prevent failure of drainage system due to clogging with silt / sedimentation. Maintenance of the SILTSACK® on a regular basis will ensure that the SILTSACK® will function properly.

Available in two sizes: Regular Flow and High Flow

Silt Sock

Silt Sock is a sediment-trapping device which uses filter media materials applied with a pneumatic blower device or equivalent. Silt Sock trap sediment by filtering the water passing through the Silt Sock™ also allowing water to pond, creating a settling of solids behind Silt Sock.

Silt Sock is used in any area requiring sediment control to keep runoff in the form of sheet flow. The use of Silt Sock applies to areas of high sheet erosion, on steep slopes up to and exceeding a 2:1 slope, and in other disturbed areas of construction sites requiring sediment control. Silt Sock may also be used in sensitive environmental areas, where migration of aquatic life is impeded by the use of other sediment controls. Filter media used in Silt Sock also have the ability to bind various contaminants contained in runoff.


Terradrain® 620 has a thin, high-strength plastic sheet added to the flat side of the core to provide extra protection when applied over softer waterproofing materials. The plastic film prevents intrusion of the soft membrane into the back side of the core dimples.

Terradrain® 620 is installed much the same way as Terradrain® 200 and 600. If Terradrain® 620 is being applied over a soft waterproofing membrane it is important to hold it in place using a method or device that will not puncture the membrane.

Terradrain prefabricated drainage systems consists of a polymer core with a geotextile laminated on one side. The geotextile allows water or gases to pass into the drainage core while restricting the movement of soil particles, which might clog the core. The core provides a void to allow the liquid or gas to flow to designated outlets. Terradrain provides a cost-effective alternative to aggregate drains and a solution to many drainage and vapour problems.

Terradrain® 900 is a lightweight drainage system designed for horizontal drainage of parking decks,plaza decks,balconies and under slab applications. In comparison to conventional aggregate drains, roof loading is dramatically reduced. When used beneath planted areas the thin profile allows maximum topsoil depth for proper root growth. Terradrain® 900 is produced in rolls 1.22m x 15.24m for easy, full coverage of horizontal applications requiring high core compressive strength and high geotextile tensile strength.

Terradrain® strip drain is a prefabricated, high-flow drainage system that offers better drawdown of water than pipe while costing around 60% less to install. Terradrain® strip drain consists of a formed polymeric core surrounded by a geotextile filter fabric. This multichannel structure provides significantly increased water flow. The tough filter fabric covering prevents core clogging while allowing water entry through every inch of its surface. The core allows water to flow to designated drain exits.

With a crush strength of 9,000 (kN/m2), Terradrain® core easily withstands the pressures of backfilling and compaction during installation with no loss of flow area.


Terraweb® is a light-weight, flexible, polyethylene confinement system consisting of three-dimensional cells in a honeycomb-like structure. Terraweb® creates an economical erosion barrier or structural foundation.

Applications include:
Ground stabilization for temporary/permanent roads
Terraweb® is effective in distributing applied loads over a large surface. It significantly reduces pressure applied to the subgrade by loads exerted on the top surface of the cells. Because the cell walls resist lateral movement, Terraweb® can transform poor quality infills into stable load bearing surfaces.

Erosion Control for Slopes
Using vegetated soils, Terraweb® improves the performance of slopes by protecting and reinforcing the roots zones and directing hydraulic flows over the top of the cells. For slopes with granular fill,Terraweb® improves the performance by controlling the migration of fills. This is accomplished by dissipating hydraulic energy in and underneath the cells and by confining the fill material within the cells.

Erosion Control for Channels
Whether using soil with vegetation, aggregate, or concrete as infill within the cells, Terraweb® offers an effective method of erosion protection either during intermittent or continuous flows. The cells act as a series of check dams, thereby dissipating energy of high flowing water.

Pipeline Beds
Terraweb® installs easily, eliminating over excavation or excessive stone placement.

Stormwater Management

Stormwater from urban runoff is one of the leading causes of pollution in creeks, rivers, and lakes. Conventional stormwater retention/detention systems, such as ponds and concrete structures, are historically accepted methods of controlling stormwater quantity and quality. While these methods are effective treatments to non-point resource discharge, they occupy valuable commercial land and act as open liabilities. Terrafix offers an innovative approach to stormwater challenges. 

– Triton™ S-29 Chambers with end caps
– 19mm – 50mm clear, angular stone (by others)
Sediment Control
– Non-woven geotextile (360R)
– Sediment Floor
– Sump (optional)
– Triton® S-29 Chambers with end caps
(header & distribution rows)
– Distributor pipes
– Catchbasin (by others)
– Inflow / Outflow pipes (by others)

Using an earth-friendly soy resin-based polymer, Triton produces chambers that are significantly lighter, substantially larger and much stronger than conventional chambers. The chambers are lightweight, making the strength-to-weight ratio unrivalled. Due to its larger capacity, Triton chambers are becoming the professionals’ choice for a comprehensive stormwater management solution. In addition, since Triton chambers are so light, they ship very efficiently and are installed much quicker than heavier types of chambers.

Triton chambers are less expensive, quicker and easier to install than other types of underground stormwater systems. The side portal feed provides greater flexibility in engineering and hydraulic design, eliminating circuitous routing of feed pipes from inlet structures to entry point of header pipe. Triton chambers may also be used in place of corrugated metal, or HDPE pipe for stormwater
conveyance comparable to a 48-inch diameter pipe, with the added benefit of infiltration and water quality enhancement.

Bentofix® Geosynthetic Clay Liner (GCL)

Bentofix® Geosynthetic Clay Liner (GCL)

Bentofix® Thermal Lock Geosynthetic Clay Liners (GCLs) are needle-punched reinforced composites which combine two durable geotextile outer layers with a uniform core of natural sodium bentonite clay to form a hydraulic barrier. The sodium bentonite clay utilized in Bentofix® Thermal Lock GCL is a naturally occurring clay mineral that swells as water enters between its clay platelets. When hydrated under confinement, the bentonite swells to form a low permeability clay layer with the equivalent hydraulic protection of several feet of compacted clay. Bentofix® GCLs are produced by distributing a uniform layer of the sodium bentonite between two geotextiles. Fibers from the non-woven geotextile are then needle-punched through the layer of bentonite and incorporated into the other geotextile (either a woven or a non-woven). This process results in a strong mechanical bond between the fabrics. A proprietary heat treating process – the Thermal Lock process – is then used to modify and more permanently lock the needle-punched fibres into place. Properties include increased internal shear resistance and long term creep resistance.

Superior GCL Performance

Since the late 1980s, GCLs have been specified and used by design engineers, contractors, agencies, and owners as an alternative to soil barriers in various applications. The growing interest in these products stems from the unique properties and advantages they offer. They are very effective as a hydraulic barrier even under high gradient conditions; they are easy to install; more robust against installation stresses and can withstand elongation as well as settlement stresses without significant impact on hydraulic performance. The wide range of GCL uses include landfill caps and base liner applications, dams, canals, ponds, rivers and lakes, and even waterproofing of buildings and similar structures. Numerous laboratory studies have shown the excellent performance capable with natural sodium bentonite GCLs.

By needle-punching fibres through the sodium bentonite clay layer, a completely uniform, reinforced GCL is produced – with shear strength and stability advantages important to any application, such as:

  • Golf course ponds.
  • Stormwater management ponds.
  • Recreational ponds.
  • Landfill cap closures / base liner.
  • Dams/dikes.
  • Vertical trench cutoff Barrier.
  • Groundwater protection cover.
  • Environmental protection barrier under roads and railways.
  • Secondary containment for above ground tanks.

Bentofix® Thermal Lock GCLs represent a cost effective solution, which is both simple and economical. To install, a core bar is inserted through the core, and the roll is suspended from a spreader bar. Ease of installation using a spreader bar allows the contractor to roll out theBentofix® rolls with a minimal amount of labour. One truckload of GCL can carry over 6,000 m2 compared to a
truckload of native clay which will only cover an area of 40 m2 (based on a 50 cm compacted clay layer).

Terrafix Bentofix Geosythetic Clay Liner (GCL) Brochure
Bentofix (GCL) Installation Guidelines

Simple, cost-effective installation techniques make Bentofix® Thermal Lock GCL a practical alternative to a compacted clay liner or other lining systems. GCLs do not require an experienced installation contractor and can be installed by a local general contractor. 
Thermal Lock Clay Liners
• The industry’s only Thermal Lock Geosynthetic Clay Liner
• The industry’s only Scrim-Reinforced Geosynthetic Clay Liner
• The only Canadian made Geosynthetic Clay Liner
• Now available as a geomembrane

Blog Posts

You are donating to : Greennature Foundation

How much would you like to donate?
$10 $20 $30
Would you like to make regular donations? I would like to make donation(s)
How many times would you like this to recur? (including this payment) *
Name *
Last Name *
Email *
Additional Note