The nesting of swallows and causes significant pollution of the walls and adjacent areas under their nests. A proven and effective way to protect against pollution is to prevent swallows from building a nest. Swallows build their nests mainly at the junction of a vertical wall and the adjacent horizontal surface (soffit) and therefore it is necessary to prevent swallows from flying into this space. The 3 most common methods serve well for this.
1) Spike barrier against swallows
The spike barrier against swallows consists of a carrier metal band on which metal rods (spikes) are welded and bent so that they fill the corner between the wall and the soffit. The belt with spikes is glued or screwed to the wall. The entire barrier is made of stainless steel and thus has a long service life, does not require any maintenance and does not visually disturb the protected area and is affordable.
2) Nets against swallows
The net against swallows is placed directly at the junction of the vertical wall and the adjacent soffit. It is fixed using plastic or metal brackets around its perimeter. The angle between the net and the wall should not exceed 60°, the recommended width of the net strip is 30-40 cm.
3) Wire barrier against swallows
The wire barrier against swallows consists of a metal carrier rod with holes for the introduction of 7 wires. The carrier rod is either directly “drilled” into the wooden soffit using the thread it is equipped with, or it is attached to the wall and soffit with screws (atypical carrier rod). Subsequently, steel wires are stretched through the holes in the carrier rods (installed at intervals of approx. 1.5 m) and fixed by a spring on one end.