What is a geotextile and what is it used for?

Geotextile is a flat textile material. It consists of thermoplastic polymer fibers used in geotechnical applications. Its composition has hydraulic properties which allow it to perform various filtering functions. Likewise has mechanical properties to determine if it can withstand the stresses it will be subjected to.

They can be polypropylene or polyester. It must be chosen with care, as those made of polyester can be attacked by cement, concrete or alkaline soils with gypsum particles.

Polyesters use reclaimed fibers in their manufacturing process and are made from staple fibers. Next we explain what cut fibers mean and other terms related to the structure of geotextiles.

Terminology used in nonwoven geotextiles

When selecting nonwoven geotextile specifications, we will come across a few specific terms. Some of them are:

continuous threads

The threads in nonwoven geotextiles are endless. Therefore it should have continuous threads.

staple fibers

When a non-woven geotextile has staple fibers, it means it has filaments of a specific length.


Needled or needled geotextile means that the connection between strands is mechanical by internal needles. They go in and out from the top to intertwine the threads.


This term means that the threads of the non-woven geotextile are heat-bonded by calendering. Who joins and pushes the strings to join them.

heat sealed

In this case, the geotextile has yarns bonded by heat through thermofusion.

These terms are combined to give a general description of the geotextile we require. For example, a staple fiber needled geotextile that does not exhibit heat fusion has inferior mechanical properties. Only due to the fact that there is no such connection between the strands. If they have to withstand a perpendicular force, it is possible for the fibers to fray.

So-called calendered geotextiles have a smaller thickness, but their elongation is lower than that of needled geotextiles. Yarns allegedly impregnated with endless or heat-sealed yarns are mechanically more resistant.

To determine which geotextile to use, it is best to contact a trusted specialist.

What is the function of the geotextile?

The geotextile can fulfill different functions, the following are the most important ones:

I share

Geotextiles can separate surfaces with different physical properties. It is placed between two different layers of soil or between natural soil and another material. In this way, mixing of the soil is avoided.

You must be able to do this withstand the dynamic and static loads of the filling material and traffic during installation. Yet another function it must perform is to retain the material to prevent mixing.


These geotextiles must be able to filter water and retain fine particles in the same direction as the water flow. Your goal here is to maintain the hydraulic stability of the filter, so permeability is important to prevent geotextile clogging.


To perform this function, the geotextile must be able to evacuate gases and liquids throughout its thickness. At the same time, it prevents fine particles from being washed away. It must therefore have the property of being permeable in thickness and plan.


Two types of reinforcement can be provided by geotextiles. One of these occurs when it comes to ground stabilization, due to the retention of particles by vacuum removal of particles.

The other type of reinforcement is related to the thrust it exerts, which cancels the overturning forces. This occurs in retaining walls where layers of geotextile are spread inward from the wall. The main property that the geotextile must possess to fulfill this function is mechanical resistance.

To protect

The geotextile also acts as an excellent waterproofing system, an impermeable barrier against mechanical damage that can be caused by punctures or abrasion.

Depending on where it is used, it must fulfill certain functions.

Where is the geotextile applied?

Geotextiles are used in roads, railways, waterworks, drainage, slope stabilization, tunnels, landfills, foundations and covers.

To get to know Reference prices from professionals recommended by other users.

Public Works

It is used in public works as it is resistant to possible damage that may occur during installation. As it is puncture resistant, it adapts to unevenness in the soil layer and prolongs the life of the seawall.


The geotextile makes the soil more resistant to mechanical damage. Because it promotes water drainage, it reduces the formation of surface sagging.


The primary function of geotextiles in waterproofing works is to protect synthetic membranes and resist puncture.

This material is one of the favorites for patio waterproofing.

drainage networks

In drainage networks, geotextiles help separate and stabilize soil and other materials. It also prevents contamination and extends the life of the drainage system.


Geotextiles are widely used in gardens as they prevent excess moisture, improve transpiration and release excess heat. Another advantage of this material is that it lets water and air through, but not the sun’s rays.

If you plan to create green terraceCheck out the article below where we tell you everything you need to be aware of.