Our aquaSHIELD Heavy Duty Pond Liner Underlay is a high quality 275gsm, non-woven polypropylene geotextile underlay for use with all types of pond liner.

Although often overlooked, the quality of your pond liner underlay is just as important as the pond liner itself. A protective layer of underlay should be installed prior to your new pond liner of choice. Underlay not only shields your pond liner from sharp stones and roots, but also helps prevent localised stretching that can occur over time.

When it comes to pond liner underlay, only a proper geotextile will do. Always avoid cheap ‘fleece’ underlays as these have a tendency to tear and stretch. Quality underlay will always have a weight (rather than a thickness) associated with it. The greater the weight (usually measured in gsm – grams per square meter) the more protection is provided.

Our 275gsm Heavy Duty aquaSHIELD Pond Liner Underlay is suitable for any sized pond but is particularly recommended for koi ponds and larger ponds, for the ultimate in pond liner protection.

It is ideal for use as a protective ‘overlay’ for wildlife ponds and swim ponds where a gravel or soil is added to the pond. An overlay is also a good idea if you have pets or wildlife that use the pond regularly to help protect the liner surface. It can also be used under planting baskets and rocks. Its black colour blends in seamlessly for subtle yet very effective protection.

AquaSHIELD pond liner underlay is supplied in 2m wide lengths that can be cut into sections using sharp scissors or a stanley knife for easy installation. Individual pieces should overlap by at least 10cm to ensure a continuous protective layer.

• Black 275gsm aquaSHIELD Heavy Duty Pond Liner Underlay
• Suitable for all pond sizes but especially recommended for koi ponds and larger ponds
• High quality non-woven polypropylene geotextile
• Supplied in lengths of 2m width / sold per m2
• Suitable for protecting all types of pond liner
• Minimum order quantity of 10m2