Solar Panel Bird Proofing in London: Why Pigeons Are a Problem and What to Do

Solar panel installations across London have grown rapidly, and with them, a new pest problem: feral pigeons nesting in the void between panels and roof tiles. It’s a problem that’s worsening — and one that most homeowners don’t know about until significant damage has already occurred.

Why Pigeons Like Solar Panels

The space beneath solar panels is almost ideal for pigeon nesting. It’s:

• Elevated and difficult to access (meaning fewer disturbances)
• Warm — panels trap heat from below
• Sheltered from rain and direct wind
• Adjacent to a reliable food source (London’s urban environment)

A pair of pigeons can produce up to 6 broods per year. Once a nesting site is established, the same location will be used season after season unless it’s physically proofed.

The Damage They Cause

Droppings: Pigeon droppings are highly acidic. Accumulated guano beneath panels degrades the wiring insulation, corrodes connectors, and can cause significant damage to roof tiles. The acidity can also affect the panel mounting brackets.

Nesting material: Twigs, feathers, and debris accumulate and block drainage channels, potentially causing water ingress into the roof structure.

Efficiency loss: Droppings on panel surfaces reduce light transmission. Even partial shading can cause significant efficiency drops due to how panel strings are wired.

Noise and smell: An active pigeon colony under your roof panels is audible — scratching, cooing — and the accumulated guano creates a persistent unpleasant smell.

Health risk: Pigeon droppings can carry Cryptococcus (a fungal infection), Histoplasma, and Chlamydia psittaci. Dry guano becomes airborne as fine particles that can be inhaled.

When to Act

Bird proofing should be installed at the same time as panels if possible — this is significantly cheaper and easier than retrospective installation. However, most homeowners only discover the problem once pigeons have already established themselves.

Signs of pigeon activity under solar panels:

• Droppings visible on roof tiles at panel perimeter
• Cooing or scratching sounds from the roof
• Feathers or nesting debris visible beneath panel edges
• A visual inspection showing gaps at the panel perimeter

What Does Bird Proofing Involve?

Professional solar panel bird proofing involves installing a physical barrier around the perimeter of the panel array that prevents birds from accessing the void underneath. There are two main approaches:

Mesh systems: Galvanised or PVC-coated wire mesh is installed around the perimeter of the solar panel array, fixed to the panels themselves without damaging them. The mesh is designed to be discreet and doesn’t affect panel performance or warranty (check with your installer).

Spike systems: Less commonly used for solar panels due to aesthetics and limited effectiveness compared to mesh.

Before proofing can be installed, any existing nesting material and accumulated guano must be removed — this is a separate task and involves hygiene precautions due to the health risks.

The Legal Position

Feral pigeons are not protected under the Wildlife and Countryside Act 1981 (unlike many other bird species). Control measures including lethal control are permitted under specific conditions, but for urban domestic situations, proofing is the appropriate and effective approach.

It’s important to note: you cannot legally remove a nest that has eggs or chicks in it. Proofing should either be done before nesting begins (late winter/early spring) or after a nesting cycle has completed. A professional can advise on timing.

Cost of Solar Panel Bird Proofing in London

The cost depends on the size of the array and ease of access:

• Small array (6–10 panels): £200–£350
• Medium array (10–20 panels): £300–£500
• Large array (20+ panels): £400–£700+

Additional costs may apply for removal of existing nesting material, guano cleaning, or work requiring specialist access equipment.

We carry out solar panel bird proofing across London alongside our wider pigeon control services. If you have or suspect a pigeon nesting problem under your panels, request a quote online for a no-obligation assessment.