Flexamat - Roadside Erosion Protection

Flexamat - Inlet & Outlet Erosion Protection

Flexamat - Landfill Erosion Prevention

Flexamat - Shoreline Erosion Protection

Flexamat - Stream & Riverbanks Erosion Protection

Learn how Flexamat is the best permanent erosion solution!

Flexamat® is a permanent erosion control mat utilized for stabilizing slopes, channels, low water crossing, inlet/outlet protection, and shorelines. It consist of concrete blocks (6.5˝ x 6.5˝ with a 2.25˝ profile) locked together and embedded into a high strength geogrid. There is 1.5˝ spacing between the blocks that gives the mat flexibility and allows for optional vegetation growth. The mat is packaged in rolls, making transporting and installing Flexamat® efficient.

Flexamat - one year after installation
Flexamat - one year after installation

Flexamat is a "Tied Concrete Block Mat".

(Tied Concrete Block Mat is a generic term for Flexamat.)

Flexamat consists of concrete shapes, locked together with a high strength, polypropylene geogrid. There are openings around each concrete block that give Flexamat the flexibility and enable it to be packaged in rolls. The openings also allow vegetation to grow through the mat. Eventually, vegetation will completely cover Flexamat. It can be manufactured with various backings such as non-woven fabric to stop vegetation growth or a TRM (turf re-enforcement mat) depending on the soil conditions and other factors.

There's a wide range of applications where Flexamat is utilized, but it is most commonly used for erosion control. Flexamat is used to control erosion in channels, outlet protection, on slopes, for shoreline protection and many other applications.

Flexamat offers permanent, hard armor protection, with a natural vegetated appearance. Flexamat may be mowed over with commercial mowing equipment or left to grow wild. Besides grass, there are many other types of native plant species that can be planted to grow within the mat. For example, Willow Saplings were planted through Flexamat for a streambank re-vegetation project.

Flexamat Benefits

  • Permanent solution
  • High performance - un-vegetated, capable of 19ft./sec. and 24psf
  • Easy maintenance - commercial mowers can be used
  • Fast and simple installation - roll design makes installation efficient
  • Reduces runoff velocities - 0.055 Manning's "n" value un-vegetated
  • Aesthetic solution - blends in with natural surroundings
  • Improves safety - safe to walk or drive across
  • Environmentally friendly - wildlife can walk across
  • Reduces construction cost - low material cost, less labor, and faster project completion
  • Versatile solution - customizable for site conditions 

Flexamat Properties

Mat Width & Length Manufactured in standard widths of 4', 5.5', 8', 10', 12, & 16'. Lengths can be cut to order per project requirements. Stocked lengths are 30', 40', & 50'. 4' x 4' mats stacked on pallets are also available.

Underlayment Options

Standard Flexamat® is manufactured with Curlex® II underlayment backing. It may also be manufactured with Recyclex® TRM or non-woven filter fabrics. Onsite conditions and project requirements determine the appropriate underlayment material. Customize Flexamat!
Weight per Square Foot 10 lbs per square foot
Block Size The concrete blocks are 6.5" x 6.5" x 2.25". There is 1.5" spacing between the blocks.
Limiting Shear 24+ PSF (non vegetated)
Limiting Velocity 19+ft./second (non vegetated)


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