Pond Liners

Pond Liners2022-09-14T17:24:19+00:00

What is a pond liner?

Pond liners are impermeable plastic membranes used throughout the containment industry for protecting the ground or just for standard containment of water. With that in mind pond liners can be either temporary or permanent. Temporary liners will last (depending on the sub-grade preparation) up to 3-5 years. And long term liners (dependent on sub-grade preparation) up to 20+ years. Studies have been carried out on existing geomembrane liners and some tests have found if properly prepared and cared for, the liner system can last many years past its expectancy.

Frequently Asked Questions

WHAT MATERIAL SHOULD BE USED?2019-05-15T18:35:22+00:00

When choosing the right material for your project, every factor is reviewed by both FLSI and our Material Manufacturers to provide the correct warranty range. With our large supplier base, FLSI has the ability to provide almost any material used in the industry. Factors we take into account include:

  • Liners Expected Life – If a liner is only needed for a short term of less than 5 years, then we have several choices to best suit your needs. If a liner is needed for a short term of longer than 5 years, maybe as long as up to 30 years, we also have a large selection to choose from that fits your projects specifications and budget.
  • Project Size – If your project is 4 acres or less, FLSI has the ability to supply preformed liners that are rolled up in one single piece for you to install yourself if needed. If the project is larger, don’t hesitate to consider FLSI to perform the work! We can handle anything from backyard projects to 550+ acre projects.
  • Project Location – If access is limited, sometimes material choices can be affected. While this isn’t the case in 95% of the projects that we have come across, it can happen and force us to look only at certain materials.
  • General Project Specifications – From the contents being contained, to the sub-grade preparation can play a role in material selection.

With our large material supplier base, we are more than confident we will find the right material to fit your projects specifications and budget.

CAN YOU REPAIR A DAMAGED LINER?2019-05-15T18:34:47+00:00

liner repair

Most damaged areas in a liner can be repaired or replaced. What mainly determines if a repair will be successful is:

  • The Location of the Damage – The location most times for damaged areas in a liner is mostly in the exposed areas of the slopes. However accidents happen and some damage areas occur below the operating level, in the case of it being below operating level the area will have to be exposed to perform a successful repair.
  • The Extent of the Damage – It’s uncommon to see damage larger than the size of a shovel head. However, if the damage goes unnoticed it can grow quite large which may require more than a small patch, but a full section of the containment liner to be replaced.
  • Material Type – The material will also determine the method of repairing the damaged area. Some materials require only extrusion welding, others require only hot air welding and some can accept both methods.

Repairs are performed with a piece of the same material and extrusion gun or hot air welder. FLSI even responds to emergency repairs when requested.

HOW LONG WILL A LINER LAST?2019-05-15T18:35:45+00:00

When looking for a life expectancy for your liner, these factors are what determines a long and healthy containment system:

  • Material Type – Material type is also a key factor in a successful liner. HDPE, LDPE, RPE, RPP, PVC, EPDM and XR-5 are some of our more commonly used materials. Each material has it’s own strengths and weaknesses.
  • Material Thickness – The material’s thickness does play a large role in the life of the liner. However, there are new material formulations that don’t require manufacturers to make thick mil/gauge liners.
  • Project Location – A projects location can sometimes play a role in the ability for installation crews and also dirt movers to properly grade the project.
  • Contents to be Contained – This goes back to both the type and thickness of a material that is best suited for the projects needs. There is almost, always a liner that works perfectly for our clients requirements.
  • General Maintenance – With liners, it is always best to catch a damaged area early on. If the repair is put off, it can create washout, undermining, bubbling or even a cause the entire liner system to float. FLSI offers a service contract for annual or bi-annual site visits to review your liners overall health.

To really answer the question, it can be quite difficult. However, we have seen firsthand liners that have been in service for more than 40+ years that look fantastic and have minimal degradation.


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