POND LINER UNDERLAY
Choosing a high quality geotextile pond liner underlay is esssential to protect your pond liner and from sharp stones and roots, and reduce the risk of localised stretching from ground settlement over time. Our aquaSHIELD pond liner underlays are exceptionally strong, highly puncture resistant and provide reliable protection for the lifetime of your pond liner.
All sizes of pond liner underlay are available for free next day delivery.
HOW MUCH POND LINER UNDERLAY DO I NEED?
Pond Liner Underlay Calculator
Our pond liner underlay is sold by the square meter. To work out how much you need, simply enter your pond liner length and width.
Our underlay comes in 2m width rolls which can be cut down with scissors or a stanley knife for ease of installation. Our pond liner calculator works out the total area of your pond liner and adds 10% to accommodate overlapping sections.
Pond liner Underlay FAQs
Do I really need pond liner underlay?
We recommend that pond liner underlay is installed beneath any pond liner. Underlay provides an essential protective layer that shields your pond liner from sharp stones, roots, and anything else that could puncture your pond liner from below.
What is pond liner underlay made of?
When it comes to pond liner underlay, only a proper geotextile will do. Always avoid cheap โfleeceโ underlays as these have a tendency to tear and stretch. Our high quality pond liner underlay is not a simple fleece. It is made from polypropylene geotextile, for maximum strength and protective performance.
What thickness pond liner underlay do I need?
Good quality underlay will always have a weight (rather than a thickness) associated with it. The greater the weight (usually measured in gsm โ grams per square meter) the more protection is provided.
Our standard 200gsm aquaSHIELD pond liner underlay is ideal for small and medium sized ponds. For koi ponds, larger ponds, or where you want the ultimate in protection for your pond liner, we recommend our 275gsm aquaSHIELD Heavy Duty Pond Liner Underlay.
What features should I look out for when choosing a pond liner underlay?
The key features to look out for when choosing a pond liner underlay are the quality of the material and the weight per square meter. Always opt for a non-woven geotextile material as they are stronger than cheaper fleece, and aim for a weight of at least 200gsm.
How long does pond liner underlay last?
Good quality geotextile pond liner underlay will retain its integrity for the lifetime of your pond liner. Our aquaSHIELD pond liner underlays are rot, UV, and weather-resistant. They are highly puncture resistant and have high tensile strength. This ensures exceptional protection for the life of your pond liner.ย ย
How much pond liner underlay do I need?
You need the same area of underlay as your pond liner (length x width) plus 10%. Unlike pond liners, which come in single sheets, underlay comes in 2m width rolls. These should be cut into sections for easy installation, and overlapped to form a continuous layer of protection. Our pond liner underlay calculator factors in an extra 10% for you to accommodate the overlaps.