Thank you to all who participated in our recent webinar, “Best Practices for Installing the GEOWEB® Geocell System,” and for submitting your technical questions regarding GEOWEB® Geocells.

Based on the discussion and submitted inquiries, we’ve compiled answers to some of the most frequently asked topics to help clarify how the GEOWEB system works and where it delivers the greatest value.

If you didn’t catch the live webinar, view the on-demand webinar here.

Q1. How difficult is it to maintain a failed subgrade with GEOWEB Geocells?

Subgrade failure can look very different from project to project, which means the level of remediation required also varies. In many cases, a failed subgrade can be stabilized relatively easily using the GEOWEB Geocell System and full removal or amendment may not be required.

To eliminate uncertainty, we offer a free project evaluation service. By submitting basic project details, our engineering team can review the conditions and recommend an appropriate solution.

Start your project evaluation here: https://www.prestogeo.com/free-project-evaluation/

Q2. Why is geotextile fabric installed first?

In standard construction sequencing, the geotextile is installed beneath the GEOWEB Geocells, with thickness and material type selected based on the application, loading conditions, and surface characteristics.

When a high-strength or high-performance woven geotextile is used, it also helps prevent soil clogging and can provide additional structural benefit. Placing the fabric below the geocells allows it to function as intended throughout the life of the installation.

Our engineering team can recommend an appropriate geotextile based on your specific project requirements and site conditions. Submit your project details to receive a free evaluation: https://www.prestogeo.com/free-project-evaluation/

Q3. How much material must be placed over the top of the GEOWEB system?

For load support applications, a wear surface is typically required about the GEOWEB Geocell material. The thickness and material type depend on the application, loading conditions, and surface type.

All load support designs will include some form of surface protection. In other applications, such as concrete channel armoring, the concrete surface will be flush with the top of the geocell. Overall, cover requirements vary depending on design and conditions.

Q4. Are the ATRA® Stakes driven through the underlayment?

The answer is yes. Whether the application involves load support, slopes protection, or channels armoring, the stakes are typically driven through the geotextile underlayment as part of the standard installation process to help secure the system during placement and infilling.

Q5. What is the typical design life of GEOWEB Geocells?

The design life can be tailored to meet project requirements. Many roadway projects require a 20-year design life, while other civil or infrastructure applications require 50 to even 100 years.

The GEOWEB Geocell material has been tested to withstand environmental exposure for up to 149 years without degradation. Because GEOWEB system is most often buried and not fully exposed to UV or environmental extremes, its real-world service life is typically even longer.

Q6. How high can you go with a GEOWEB Earth Retention Wall?

For geogrid-reinforced earth retention walls, there is effectively no height limit, provided there is adequate space for proper tieback reinforcement. Tiebacks typically extend 70% of the wall height. When terracing is possible and sufficient reinforcement length is available, GEOWEB Walls can support extremely tall structures.

We’ve completed several impressive high-wall projects over the years. You can explore some of these case studies in our Geosystems Project Gallery: https://www.prestogeo.com/gallery_presto/products/soil-stabilization/geoweb-retaining-walls/?type=casestudy

Q7. Do you perform overturning analysis and global stability checks for earth retention systems?

Yes, analysis capabilities are available, but the level of design support depends on project needs. In some cases, an independent geotechnical engineer may be required. Providing more information such as soil properties, seismic coefficients, and site conditions allows for a more complete evaluation.

The more information provided, the more complete and accurate the analysis can be. We also offer a free MSE Wall Design Software for those who prefer to complete calculations themselves, or our experienced engineering team can assist with a project evaluation.

Request the free MSE Wall Design Software here: https://www.prestogeo.com/design/soil-stabilization/geoweb-mse-wall-software/

Q8. Does the GEOWEB Geocells come in different colors (e.g., green or blue) to blend with nature?

Standard GEOWEB geocell material is black, due to carbon black stabilization, which enhances durability and long-term performance.

For projects where aesthetics matter, especially earth retention applications, colored fascia options are available in a tan or green finish to blend more naturally with surrounding environments. If you have a specific color requirement, custom options may also be possible depending on the project.

Let’s Keep the Conversation Going

We received even more questions than we could address during our webinar allotted time, and we appreciate the strong engagement from everyone who participated. If we didn’t get to your question or if you’d like help with a specific project, we’d love to hear from you.

You can reach us directly using the contact information provided during the session, or email [email protected] to get started with a free project evaluation.