Sand Martin Wall ZWW1 – concrete wall with 20+ nest holes | Unitura

The ZWW1 bank swallow wall is a robust concrete retaining wall with more than 20 precast nest holes, designed to create new breeding sites for the common swift during work on riverbanks and quays. The tapered nest holes mimic natural nesting tunnels.

• Concrete wall (C50/60) measuring 4.0 x 2.14 m
• More than 20 precast nest holes with a 10 cm opening
• Durable and low-maintenance, usable for many years
• A sustainable alternative to temporary sand walls that disappear due to erosion

Tip: Sow the area around the wall with a flower-rich seed mix; this provides extra insects as food for the swifts.

Installation

Ensure a solid foundation, for example a well-compacted layer of sand or rubble, to prevent settlement. After installation, fill the nesting tunnels with a mixture of light loamy or clay soil to provide sufficient stability. It is preferable to remove the old nests annually and refill the nest holes with suitable soil, so that the swifts can start fresh every year.

Technical specifications

• Brand: Unitura
• Type: ZWW1
• Material: concrete C50/60
• Dimensions: 4.0 x 2.14 m
• Entrance opening: 10 cm
• Colour: grey
• Weight: approx. 4800 kg
• Item number: ZWW1

Downloads

• Dimensional drawing (PDF)
• Product details, installation & maintenance (PDF)