Aquascape HydroDefence® Heavy-Duty Pond Underlay 250 gsm – 4 m × 5 m
| Brand | |
|---|---|
| Product Type | |
| Application | |
| Works With | Pond Construction |
Aquascape HydroDefence® Heavy-Duty Pond Underlay 250 gsm – 4 m × 5 m: aquascape Heavy Duty Underlay 250 GSM Roll is lightweight, spreads easily, making installation quick and easy.
£63.08 (inc VAT)
Aquascape HydroDefence® Heavy-Duty Pond Underlay 250 gsm – 4 m × 5 m
Aquascape Heavy Duty Underlay 250 GSM Roll is lightweight, spreads easily, making installation quick and easy. Aquascape Heavy Duty Underlay 250 GSM Boxed is used to protect pond liner from rocks, roots, and other sharp objects that may damage the liner. The underlayment is lightweight, spreads easily, and has a non-slippery surface, making installation quick and easy. The soft, non-woven geotextile made from polypropylene also allows for any gases to escape properly, rather than becoming trapped beneath the liner.
Key features and benefits
- 3 m x 3 m
- 3 m x 4 m
- 3 m x 5 m
- 4 m x 4 m
- 4 m x 5 m
- Protects pond liner from rocks and other sharp objects
- Lightweight and spreads easily
- Allows gasses to escape
Product specifications
Use the values for Aquascape part number 42078; related sizes and visually similar service parts may have different specifications.
| Aquascape part number | 42078 |
|---|---|
| Brand | Aquascape |
| UPC / GTIN | 827807420783 |
| Product weight | 11.34 kg |
Preparing the surface beneath the liner
Remove sharp debris and compact unstable ground before laying the underlay. Overlap adjacent pieces and protect the liner anywhere it will be pressed against masonry, roots or angular stone. Underlay reduces puncture risk but does not replace sound ground preparation.
Before you order
Underlay cushions the membrane against the prepared ground. Rock pads and geotextiles have separate protection or separation roles. Check the material weight, pack coverage and intended use before choosing them.
- Remove sharp objects and prepare the substrate before laying protection.
- Allow overlap and cover every lined surface, including shelves.
- Use additional protection beneath heavy rocks where the design requires it.
Does thicker protection let me skip ground preparation?
No. Underlay reduces puncture risk but does not make sharp rubble safe. The supporting surface still needs to be stable and properly prepared.
Are underlay and rock pads the same thing?
No. Match each material to its stated application. Do not use a loose rock pad as a lifting sling unless the exact product is designed and rated for lifting.
Continue planning: Aquascape Pond Underlay & Geotextiles · Aquascape EPDM Pond Liner
Planning a pond with a tailored liner?
Our custom box welded EPDM pond liners are made to your pond dimensions for a neat finish without corner folds. The rectangular pond calculator also offers matching black 250gsm underlay packs, with an allowance for the base, walls and overlaps. If you buy underlay separately here, you can choose liner only in the calculator to avoid ordering it twice.
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