Geosynthetic Advisors

Your Expert Resource for Geomembranes and Geotextiles

Sales | Installation

About Us

Your Expert Resource for Geomembranes and Geotextiles

Geosynthetic Advisors is a full-service geosynthetic containment firm with a proven track record since 1996. We specialize in design-build delivery, offering fully integrated geosynthetic construction services for both containment and geosynthetic-related civil infrastructure projects.

With over 300 million square feet of geosynthetics installed and supplied, we bring the scale, expertise, and reliability needed to handle complex, large-scale projects. Operating throughout the Northwestern and Western United States, we consistently deliver tailored, start-to-finish solutions—even in the region’s most demanding environments.

We are committed to ensuring the success and longevity of your projects through our expertise and dedication.

Services

Our Comprehensive Geosynthetic Services

  • Our Geosynthetic Containment Installation services provide reliable, high-performance solutions for a wide range of containment needs. From agricultural lagoons and stormwater basins to industrial and municipal projects, we specialize in the precise installation of geosynthetic liners and materials, including HDPE, LLDPE, geotextiles, and geomembranes. Our experienced crews ensure each system is installed to exact specifications, delivering long-term durability, leak prevention, and environmental compliance. Whether your project is large-scale or small, we offer efficient, cost-effective installation tailored to your site conditions and regulatory requirements.

  • Our Design-Build Project Delivery approach streamlines the entire construction process by integrating design, engineering, and installation into a single, cohesive service. From initial concept through final construction, we manage every phase of your geosynthetic or civil infrastructure project—ensuring clear communication, faster timelines, and cost-effective solutions. By eliminating the need for multiple contractors, we reduce risks and deliver turnkey containment systems tailored to your specific needs. With decades of experience and a focus on quality and performance, we make complex projects simple and successful.

  • Our Leak Detection & Repair services are designed to quickly identify and resolve issues in geosynthetic liner systems, protecting your project from costly failures and environmental risks. Using advanced testing methods and experienced technicians, we detect even the smallest breaches in HDPE, LLDPE, and other liner materials. Once identified, our team implements precise, effective repairs to restore containment integrity and extend the life of your system. Whether it's routine maintenance or emergency response, we provide fast, dependable solutions that ensure long-term performance and regulatory compliance.

  • Geosynthetic Liner Maintenance is essential to ensuring the long-term performance and integrity of your containment system. Our maintenance services include routine inspections, debris removal, seam integrity checks, and early detection of wear or damage caused by environmental stress, UV exposure, or mechanical impact. By identifying and addressing potential issues before they become costly failures, we help extend the lifespan of your liner and maintain regulatory compliance. Whether it's a lined pond, reservoir, or landfill cell, our expert team provides proactive, site-specific maintenance plans to keep your system performing at its best.

  • Our Piping Installation services support a wide range of containment and civil infrastructure projects with expert installation of PVC, steel, cement, HDPE, and other piping systems. We design and install pipelines for water conveyance, drainage, leachate collection, and fluid transfer with a focus on durability, precision, and long-term performance. Whether integrating with a geosynthetic liner system or supporting a standalone civil application, our team ensures every pipe is properly fitted, sealed, and tested to meet project specifications and regulatory standards. From simple layouts to complex piping networks, we deliver dependable solutions tailored to your site and system needs.

  • Our Geosynthetic Consulting & Quality Assurance services provide expert guidance and oversight to ensure your containment systems are designed, installed, and maintained to the highest standards. With decades of industry experience, we offer strategic support during project planning, material selection, and system design to optimize performance and cost-efficiency. During construction, we provide on-site quality assurance, including material inspections, weld testing, and compliance verification, to ensure your geosynthetics meet all regulatory and project specifications. Whether you need third-party verification or full lifecycle consulting, we help you build with confidence and long-term reliability.

  • Securing funding for water conservation and containment projects can be challenging—that’s why we offer Grant Writing Assistance to help make your project more affordable. In partnership with a trusted third-party grant specialist, we help identify applicable funding opportunities and develop strong, competitive grant applications. Our team works closely with clients and our grant partner to align project goals with funding requirements, increasing your chances of approval. Whether you're planning a new reservoir, stormwater system, or agricultural containment project, we’re here to support you every step of the way—from concept to funding and beyond.

Geosynthetic Installation

Leak Detection & Repair

Geosynthetic Consulting

Design-Build

Piping Installation

Grant Writing Assistance

Completed Projects

Ask About Our Civil Construction Division

Looking for full-service site development? Our Civil Construction Division provides complete design-build solutions—from site grading and excavation to liner installation and finishing work. We simplify complex projects with seamless coordination and expert execution.

IAGI

Certified Welding Technicians You Can Trust

At Geosynthetic Advisors, we take pride in the quality and precision of our work—which is why our field teams include Certified Welding Technicians (CWTs) accredited through the International Association of Geosynthetic Installers (IAGI).

Our technicians are certified to meet IAGI’s rigorous standards for geomembrane welding and seam quality, ensuring every liner installation is completed with expert-level skill and consistency. The CWT program verifies each welder’s competency through hands-on testing and documentation, so you can trust that your project meets the highest levels of durability, performance, and compliance.

When you partner with Geosynthetic Advisors, you're getting more than experienced crews—you’re getting certified professionals committed to delivering secure, long-lasting containment systems every time.

Contact Geosynthetic Advisors

Let’s Get Your Project Started

Whether you’re planning a large-scale containment system, seeking expert advice, or exploring grant opportunities, our team is here to help. At Geosynthetic Advisors, we bring decades of industry experience and a full-service approach to every project—no matter the size or scope.

Reach out today and connect with one of our knowledgeable team members.

Email
Bob@GMLiners.com

Phone
406.581.7753

1414 SW 3rd Ave, Suite 2702
Portland, OR 97201