Alert® - Contamination Indicator Geotextile

Developing brownfield sites often involves safely containing underground hazards rather than removing them. Our Alert® geotextile provides a crucial warning layer, protecting future construction workers from accidental excavation into contaminated ground and ensuring long-term site safety.

What is the Alert® Contamination Indicator?

Geosynthetics Ltd developed Alert® as a clear and robust solution for marking buried hazards. This high-visibility orange geotextile serves as an unmistakable visual warning barrier when exposed during any future excavation work. Manufactured from high-tensile strength woven polypropylene tapes, Alert® is exceptionally durable and built to last underground for decades.

Beyond its primary warning function, it also acts as an effective separation layer between contaminated and clean fill materials. Alert® provides a simple, long-lasting, and effective solution for managing the risks associated with developing contaminated land.

Why Alert®?

High-visibility warning

Vivid orange colour provides a clear visual indicator.

Prevents accidental excavation

Protects workers and the environment from buried hazards.

Excellent tensile strength

Woven polypropylene construction ensures long-term durability.

Ensures site safety

Provides a permanent warning for future site activities.

Long-term Performance

Resists degradation for a long service life underground.

Effective separation layer

Prevents the migration of contaminated and clean materials.

Brownfield development solution

Designed to meet the specific needs of contaminated sites.

Simple and effective

An easy-to-install and reliable hazard marking solution.

Need Help?

01455 617 139

Main Office

[email protected]

Free consulation

Resources & Downloads

Brochures

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Data Sheets

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View Case Study Library

  • Alert® – Centenary Quay – Contamination Indicator
    Alert® – Centenary Quay – Contamination Indicator
    The Centenary Quay Project will turn the former Vosper Thornycroft shipyard into a bustling riverside development on the banks of…
  • Hosted by David Middleton

    Event Date

    Geosynthetic Applications for Reinforcement

    Discover a wide range of geosynthetic reinforcement solutions in this technical presentation. We cover practical applications from retaining walls, and reinforced slopes to foundations and working platforms and erosion control systems.

    You will see real-world project case studies from Geosynthetics Ltd and learn how our engineering department can directly support your project.
  • Hosted by Jamie Leake

    Tree Root Protection.

    Effective tree root protection is crucial for sustainable site development. This presentation zeroes in on our leading solution, Cellweb® TRP (Tree Root Protection). You will receive the core technical information and application guidance for Cellweb® TRP, ensuring compliance while maintaining soil permeability.

    We showcase real-world case studies demonstrating successful installations and review the product guarantee. Learn exactly how you can leverage the expertise of the Geosynthetics Ltd engineering department to specify and implement the right system for your projects.
  • Hosted by Patricia

    Sustainable Engineering Solutions using Geosynthetics for Temporary and Permanent Works

    This presentation details geosynthetic reinforcement solutions, focusing on the specific challenges of wind farm projects. We cover practical design methods for reinforcing access tracks and hardstanding areas, including the use of Cellweb® TRP within tree root protection zones.

    We also provide a technical overview of other key applications, such as reinforced soil walls, working platforms, and embankment support. See real-world case studies from Geosynthetics Ltd and learn how our engineering department can assist with your project designs.
  • Hosted by Colin Dobson

    Event Date

    Alternatives to Conventional Surfacing Solutions

    Are you seeking robust alternatives to traditional surfacing? This presentation explores practical solutions for car parks, access roads, and specialist applications like ‘no dig’ zones, tree root protection, and green roofs. We introduce our proven product range, including Golpla grass reinforcement, Roofcell for rooftops, and heavy-duty Exopave pavers.

    You will see practical construction methods and real-world case studies from Geosynthetics Ltd, demonstrating how to achieve stable, high-performance surfaces for challenging site conditions.
  • Hosted by Colin Dobson

    Tree Root Protection

    Effective tree root protection is crucial for sustainable site development. This presentation zeroes in on our leading solution, Cellweb® TRP (Tree Root Protection). You will receive the core technical information and application guidance for Cellweb® TRP, ensuring compliance while maintaining soil permeability.

    We showcase real-world case studies demonstrating successful installations and review the product guarantee. Learn exactly how you can leverage the expertise of the Geosynthetics Ltd engineering department to specify and implement the right system for your projects.
  • Hosted by Pablo Bernardini

    Event Date

    Foundation Solutions for Temporary & Permanent Works

    Explore effective geosynthetic solutions for foundations on temporary and permanent works. This presentation details our complete range, of Geosynthetics systems including Geogrids, Geotextiles, Erosion Control and Drainage composites.

    You will see practical construction methods and real-world case studies from Geosynthetics Ltd, demonstrating how to achieve stable, high-performance structures for challenging site conditions.

  • Hosted by David Middleton

    Event Date

    Geosynthetic solutions for common civil engineering applications

    Explore effective geosynthetic solutions across the full spectrum of civil engineering challenges. This presentation details our complete range, from environmental drainage and accelerated consolidation systems to slope stabilisation and soil reinforcement.

    We also cover geomembrane linings for containment and impermeable applications, plus innovative erosion control across temporary and permanent installations.

    You will see practical application methods, real-world project case studies, and learn how you can leverage the technical expertise of the Geosynthetics Ltd engineering department for your specific project challenges.

Our Services Support Smarter Ground Solutions

Engineering Solutions

Our in-house engineering department offers an extensive range of geosynthetic solutions created by fully qualified and experienced civil engineers.

Next Day Delivery

Wherever possible, for our stocked items, we can offer a next day delivery service, direct to site to ensure your project stays on track.

Seminars

Enhance your understanding of geosynthetics functions and applications by attending one of our upcoming seminars. Our expert-led sessions cover a range of topics, from Erosion Control, Tree Root Protection, Soil Stabilisation, Soil Reinforcement to sustainable construction best practices.

Merchant Support

We are fully committed to the success of our Builders Merchant partners. Our strategy is built on a foundation of collaboration and support, ensuring that when you succeed, we succeed.

Get a Quote 01455 617 139

Latest News & Industry Updates

  • Melissa Davison Promoted to Operations Director!
    News
    Melissa Davison Promoted to Operations Director!
    Geosynthetics Limited is delighted to announce the promotion of Melissa Davison to Operations Director. Melissa has been an integral part…
  • Welcome back, Robyn: strengthening our specification team at Geosynthetics Ltd
    News
    Welcome back, Robyn: strengthening our specification team at Geosynthetics Ltd
    At Geosynthetics Ltd, we are thrilled to welcome back Robyn as our new Sales Manager, focusing on the specification side…
  • The True Cost of “Muck-Away”: How Smarter Design Can Protect Your Project Budget
    News
    The True Cost of “Muck-Away”: How Smarter Design Can Protect Your Project Budget
    Excavation and disposal costs are some of the most frequently underestimated expenses during the early design stages of a project….
  • Excellence Confirmed: Geosynthetics Ltd Achieves ISO Renewal and H&S Audit Success
    News
    Excellence Confirmed: Geosynthetics Ltd Achieves ISO Renewal and H&S Audit Success
    At Geosynthetics Ltd, we hold ourselves to the highest standards, not just in the innovative solutions we provide, but in…
  • Geotextile vs. Geomembrane: Why the distinction matters and how to choose the right solution for your project
    News
    Geotextile vs. Geomembrane: Why the distinction matters and how to choose the right solution for your project
    We often hear 'geotextile' and 'geomembrane' used as if they’re the same product, but they play very different roles in…
  • Festive fun as the team embrace Christmas Jumper Day!
    News
    Festive fun as the team embrace Christmas Jumper Day!
    Photos from Christmas Jumper Day 2025!
  • Geosynthetics Limited present cheque to Mencap Hinckley
    News
    Geosynthetics Limited present cheque to Mencap Hinckley
    We're thrilled to present cheque to Mencap Hinckley!
  • Wheelchair Friendly Access
    News
    Wheelchair Friendly Access
    Golpla™ Grass and Gravel pavers often assist designers to comply with the requirements of Building regulations Part M whilst providing…
  • Geosynthetics Limited raise over £6,500 for local charity!
    News
    Geosynthetics Limited raise over £6,500 for local charity!
    We're thrilled to announce we've raised over £6,500 for Mencap Hinckley!
  • Geosynthetics exhibit at Highways UK!
    News
    Geosynthetics exhibit at Highways UK!
    Geosynthetics Limited were at the NEC in Birmingham on the 15-16 October 2025 for the must-attend exhibition and the highlight of…
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