How to Repel Seagulls from Rooftops

This article explains how one of BirdGard Iberia’s clients managed to repel seagulls from the rooftops of their factory.

Flocks of thousands of seagulls were constantly using the roofs of one of the buildings in the factory, which spans over 75,000 square meters. Their presence resulted in over a ton of waste and dirt per year.

Thanks to the bioacoustic Bird Gard seagull repellers, the seagulls have relocated to other areas away from the factory, ceasing to be a problem.

Seagull proliferation on the factory rooftops

Prior to installing Bird Gard’s seagull repellers, the factory roofs and two adjacent warehouses were constantly invaded by flocks of thousands of seagulls.

There are several reasons explaining the presence of thousands of seagulls on these factory buildings:

  1. The factory is located about 10 kilometers away from a landfill. Seagulls use this landfill as a food source, which leads to the proliferation of seagulls in the area.
  2. The factory is about 500 meters away from a river, in a mountainous area. It is a cold and humid place, resulting in morning dew. The factory roof is a plastic coating over an existing roof. In many areas of the roof, the morning dew forms puddles that attract seagulls to drink and cool down.
  3. The roof, with an area of 75,000 square meters, is mostly painted white, making it stand out and more attractive to seagulls.

What problems did the seagulls cause?

The seagulls used the rooftops as a resting and feeding spot. They would collect food scraps from the landfill and bring them to the factory to consume.

As part of the factory’s Maintenance and Risk Management Plan, two annual cleanings of the roof were carried out due to the excessive dirt caused by the birds. Over 1 ton of seagull remains were removed. These remains included not only seagull droppings or nest debris but also skeletons from the landfill, bones, stones they consumed and regurgitated… Over 1000 kilograms of dirt were removed every year. The cleanings were necessary to prevent health risks, drainage blockages, deterioration of the roof, and its skylights.

These photos show the condition of the rooftops before the installation of Bird Gard seagull deterrents:


What can be done to repel seagulls?

As part of the Maintenance and Risk Management Plan, in 2019, the factory considered:

“What can be done to repel seagulls? What solution can we implement to prevent birds from resting on our roof?”

We researched different methods of seagull protection online and, in October 2019, we contacted BirdGard Iberia.

After a more thorough market exploration, we had confidence in the solution recommended by BirdGard Iberia. At the end of 2019, we implemented the project for seagull protection in our facilities. We embarked on this project with the goal of improving the quality of our installations.

Sounds to repel seagulls

In 2019, the following was installed:

  • A Bird Gard Super Pro Amp #20 bird deterrent installed in the center of the factory roof, which spans over 75,000 square meters.
  • And two Bird Gard Pro Plus #20 bird deterrents installed to protect each of the two adjacent warehouses from seagulls. Since there are no power connections on the roofs of these warehouses, these two Bird Gard Pro Plus seagull deterrents are powered by 12V batteries that are kept charged by Bird Gard’s 25W Solar Panels.

The following photos show the Bird Gard Super Pro Amp seagull deterrent installed in the center of the factory roof. This device consists of a central unit where all the intelligence of the equipment is located, and a tower with 20 speakers that propagate anti-seagull sounds in all directions. This seagull deterrent provides coverage against seagulls over 12 hectares.


In this video, you can see the Bird Gard Super Pro Amp bird deterrent in action. The device emits sounds to scare away seagulls. The sounds emitted by the Bird Gard seagull deterrent are seagull cries along with calls from natural seagull predators. They are exclusively natural bird sounds.

Results of Bird Gard Seagull Repellers

The results have been very satisfactory. The Bird Gard seagull repellers have been operational continuously since their installation in 2019. The factory has been successfully protected from seagull presence.

As part of the Maintenance Plan, two annual cleanings of the roof are still being conducted, but now only as a preventive measure to check the condition of the roof, its drainage system, and skylights that provide interior lighting for the factory. The amount of dirt and bird remains removed after these cleanings has been reduced by over 75%. In fact, there are considerations to reduce the number of annual roof cleanings to just one.

These photos show the condition of the rooftops after the installation of Bird Gard seagull deterrents.

More Information on How to Repel Seagulls