A pond liner is a relatively expensive investment. Taking care of your liner can mean it will last up to thirty-five years or more. The cost of any type of flexible pond liner depends on the size of the build and the liner material you choose. Rubber liners such as Butyl and Epalyn (EPDM) are slightly more expensive than PVC, however they offer many high quality features such as resistance to ultra-violet rays, highly flexible moulding readily into the contours of a pond design and resistant to tearing. Despite the high specifications, if care is not taken during installation, you could risk damaging your liner. What goes under your pond liner of choice can make a difference to your water features success and liner longevity.
Importance of protective underlay to a pond liner
A geotextile liner is a permeable fabric made from synthetic materials. It is commonly used in pond construction to serve as a protective layer or stabilizing material, offering several key benefits.
If the ground you have built your pond contains sharp rocks, roots, or debris, a layer of geotextile protective underlay material beneath the liner can prevent punctures. You only need to consider the weight of just 10 litres of water to appreciate the pressure baring down on a liner once the water feature has been filled.
Provides a stable foundation by preventing soil movement under the liner. Reduces erosion and enhances the structural integrity of the pond base.
Protective liner options
For most ponds, non-woven geotextile underlay liner is the best choice. Geotextile is specifically designed for this purpose, offering superior durability, protection, and ease of installation. Additionally, they are lightweight, easy to cut, and compatible with all liner materials.
Adds structural support for liners in larger projects where the risk of damage is higher.
If you’re on a budget or have an irregular surface, combining a geotextile underlay with a sand layer can provide an effective, cost-efficient solution.
Benefits of adding a protective underlay liner
By adding a protective underlay between the soil and your pond liner you will help extend it’s life. Geotextile also helps to reduce maintenance costs by preventing leaks or liner failures. In summary, it will increase the overall durability and resilience of the pond structure.
In most pond construction projects, especially with flexible rubber liners, a geotextile underlay is a cost-effective and practical solution to protect the liner and ensure long-term functionality.