How to Get Rid of Pigeons on the Roof

Why Pigeons Choose Roofs

Feral pigeons are descended from the rock dove (Columba livia), a cliff-nesting species. For pigeons, the urban roofscape replicates the cliff face almost perfectly: elevated positions for safety from ground predators, sheltered ledges and recesses for roosting and nesting, south-facing surfaces for warmth, and proximity to food sources at street level. Pigeons are highly site-faithful — once they have established a roost on a building they return habitually, season after season, unless physically prevented from doing so.

Once a roost is established, guano accumulates rapidly. A single pigeon produces approximately 12 kg of droppings per year. A roost of 20 birds on a building generates 240 kg of acidic guano annually — deposited on ledges, parapets, roofing membranes, solar panels and rain-water gutters. Gutters blocked with guano and nesting material fail to drain, causing overflow damage to the building fabric. The longer a roof pigeon problem runs untreated, the greater the structural and health remediation costs.

Pigeon Problems by Roof Feature

Different roof features attract pigeons for different reasons, and the appropriate deterrent solution varies accordingly. A professional roof survey identifies all roost points and specifies the correct system for each.

Ridge and Hip Lines

Ridge lines and hip intersections are among the most commonly used pigeon roost points on pitched roofs. Pigeons perch along the ridge to survey the surrounding area — the elevated position gives a clear sightline for predator detection. Ridge line roosting leads to guano contamination of the roof slope below, blocking valleys, soiling solar panels and accumulating in gutters. Stainless steel spike systems fitted to the ridge are the standard deterrent — they prevent confident perching without causing harm. Spike systems should be installed along the full ridge and hip length, not partial sections, to prevent birds from finding untreated sections alongside treated ones. On some heritage ridge profiles, spring-tensioned wire systems are more appropriate than spikes where planning constraints apply.

Flat Roofs

Flat roofs — commercial, residential and industrial — offer large unobstructed areas that pigeons use for both roosting in large numbers and nesting. A pair of pigeons on a flat roof can produce multiple clutches per year, with nest material accumulating in drainage channels. Guano deposits on flat roofing membranes cause progressive acid attack of the membrane surface, shortening service life. For large flat roofs, heavy-duty polyethylene netting (50 mm aperture) spanning the full roof area is the most comprehensive solution — it creates a total exclusion barrier. Netting is installed on a system of anchor posts and tensioned cables secured to the roof structure, with access panels for maintenance. For smaller flat roof areas, spike systems on parapet walls combined with wire systems on any internal ledge structures may achieve sufficient deterrence without netting the full area.

Chimney Stacks and Chimney Pots

Chimney stacks provide elevated, sheltered roosting positions that pigeons use consistently. Where chimney pots are open or capped with deteriorating materials, pigeons may nest inside the flue — a fire and odour risk in addition to a pest problem. Professional chimney pigeon-proofing uses stainless steel spike systems on the stack ledges and capping, stainless steel mesh caps over open pots (allowing flue ventilation while excluding birds), and where appropriate, spike strips along the stack coping. Any guano clearance at chimney level requires appropriate roof access — this is always a professional task.

Roof Valleys and Dormers

The internal angles of roof valleys and the ledge areas around dormer windows provide sheltered, south-facing roosting positions that pigeons exploit consistently. Valley gutters blocked with guano and nesting material are a common cause of roof water ingress. Deterrent systems in valleys and around dormers typically combine spike strips on the horizontal ledge surfaces with attention to any gaps in the dormer construction that give access to the roof void. Where gaps exist at valley junctions, these should be proofed with appropriate materials before deterrents are fitted — an open void adjacent to a deterrent-treated external surface simply redirects birds inside the structure.

Solar Panels

The gap beneath roof-mounted solar panels creates an ideal nesting site — sheltered, elevated, warm (panels generate heat gain), and protected from above. Pigeon nesting under solar panels reduces panel generation efficiency through guano soiling and shading, creates fire risk from nesting material adjacent to electrical connections, and can damage panel frames and wiring. Professional solar panel pigeon-proofing uses purpose-designed galvanised steel mesh clip systems fixed between the panel frame and the roof covering — these attach without drilling the panel frame and create a continuous mesh skirt that prevents birds from accessing the gap beneath. Solar panel proofing should be specified as part of any roof pigeon treatment where panels are present.

A single pigeon produces approximately 12 kg of guano per year. A roof roost of 20 birds generates around 240 kg of acidic droppings annually, causing progressive corrosion of roofing membranes, blocked gutters and structural repair costs that substantially exceed the cost of professional deterrent installation.

— BPCA Technical Manual; building conservation literature

Guano Clearance Must Come Before Installation

Deterrents installed over accumulated guano fail prematurely. The acid in pigeon droppings attacks adhesive fixing systems, mortar joints and the substrate materials used to anchor spike bases and wire posts. Additionally, where guano has accumulated to significant depth — in valleys, behind parapets, in dormers — it creates an elevated surface that effectively bridges over spike rows, allowing birds to walk on top of the deposit and reach the roost surface anyway. All guano, nest material and feather debris must be cleared, surfaces treated with a virucidal disinfectant, and the substrate prepared before any deterrent is fitted. Guano clearance at height is a hazardous waste operation requiring appropriate PPE (FFP3 respirator, Category 3 coveralls, eye protection) — this is a professional task in any context where work is at height on a building.

Partial Coverage Fails — Why the Full Roof Matters

A common cause of ineffective pigeon deterrent installation is partial coverage — treating only the most visually obvious roost points while leaving adjacent untreated surfaces available. Pigeons displaced from a treated ledge on one side of the roof find an untreated ledge on the other side within days. The deterrent investment produces limited benefit because the building remains an active roost — just on different surfaces. A professional specification surveys all elevations and all roof features, specifies deterrents for every current and potential roost surface, and installs the complete system in a single programme. This whole-building approach is the only one that achieves lasting displacement of the roost from the building rather than just rearranging where on the building the pigeons sit.

For more on bird control and pigeon deterrence, these guides may also help: pigeon pest control, pigeon removal guide, and bird pest control.

Frequently Asked Questions

How do I know if pigeons are roosting on my roof?

The signs of pigeon roosting on a roof are: visible guano deposits on ledges, parapets, window sills and the roof slope below roost points; accumulation of guano and nesting material (twigs, grass, feathers) in roof gutters and valleys; blocked gutters causing overflow staining on the building facade; audible cooing and movement sounds from pigeons on the roof, particularly in the morning; feathers and debris on paths and ground adjacent to the building; and — if accessible — visible guano deposits on the roof surface itself when viewed from an adjacent window or elevated position. A professional survey photographs all affected areas and identifies all roost points as part of the deterrent specification process.

Is it safe to clear pigeon guano from my roof myself?

No, not without appropriate training, equipment and PPE. Guano clearance on a roof combines two significant risks: working at height (requiring scaffold, MEWP or rope access and compliance with Working at Height Regulations 2005) and handling hazardous biological material (guano dust containing Chlamydia psittaci, requiring FFP3 respirators, disposable Category 3 coveralls and appropriate waste disposal). Building maintenance staff or homeowners without specific training in both working at height and COSHH-compliant hazardous waste procedures should not carry out roof guano clearance.

Professional pest controllers and specialist bird control companies carry the necessary competencies and insurance for this work.

How long do pigeon deterrents on a roof last?

Stainless steel spike systems installed on properly prepared surfaces have a service life of 10 years or more. Polycarbonate spike systems have a shorter service life (5–7 years) due to UV and weather degradation. Heavy-duty polyethylene netting has a UV-stabilised service life of 10+ years when correctly installed and maintained.

Bird Free optical gel requires re-application approximately every 2–3 years. The service life of all deterrent systems depends on surface preparation quality, installation standard, and ongoing maintenance — particularly removal of debris accumulation that can bridge deterrent rows. Annual inspection and maintenance significantly extends effective deterrent life.

Can pigeons nest under my roof tiles?

Yes — missing, cracked or lifted roof tiles create access into the roof void, and once a pigeon has found a suitable gap it will use it consistently for roosting and nesting. Nesting material accumulates in the void, droppings contaminate roof timbers and insulation, and ectoparasites from the nest can migrate into the occupied building. Pigeons inside the roof void require the nest to be removed (outside the breeding season, or when confirmed empty), the entry gap proofed with appropriate mesh or tile repair, and any accumulated guano and nest material cleared.

Before any loft exclusion work, a bat assessment is required — all UK bat species and their roosts are protected, and inadvertent disturbance of a bat roost is a criminal offence.

Why do I have more pigeons on my roof in winter?

Feral pigeons increase their use of sheltered building roosts in autumn and winter as temperatures drop — sheltered building ledges and roof voids are thermally preferable to outdoor roost sites. Additionally, food availability at street level decreases in winter, concentrating pigeons closer to reliable food sources such as food waste adjacent to commercial premises. Winter is often when homeowners first notice a pigeon problem that has been developing over a longer period, as the increased bird numbers and activity become more conspicuous.

Winter is also a practical time to install deterrents — it is outside the main bird breeding season (March–August), avoiding the risk of disturbing active nests during installation work.

What is the best pigeon deterrent for a chimney stack?

Stainless steel spike systems on the chimney stack ledges and coping are the standard professional deterrent. Where the chimney has open pots, stainless steel mesh cowls sized to the pot diameter provide bird exclusion while maintaining flue ventilation — these are fitted by securing the mesh cowl to the pot with a stainless steel fixing band. For listed buildings or properties with planning constraints, Bird Free optical gel dishes fitted to ledge surfaces are an alternative.

Any chimney stack deterrent installation at height requires appropriate working-at-height access — rope access, scaffold or an elevated platform, depending on the building configuration and access constraints.

Does falconry work for pigeon control?

Active falconry — regular visits by a licensed falconer with a trained hawk, flying the bird around and on the building — creates a genuine bird of prey presence that disturbs roosting pigeons and reduces their comfort with the site as a roost location. It is most effective as part of a comprehensive programme rather than as a standalone method: falconry can reduce roost density and disrupts established roost behaviour, making the environment more receptive to physical deterrent installation. A lone plastic hawk or owl decoy — a common DIY product — has no meaningful deterrent effect; pigeons quickly habituate to static decoys within days of them being placed.

Get Rid of Pigeons on Your Roof — South Yorkshire

Apex Pest Control Ltd removes pigeons from roofs across Sheffield, Leeds, Barnsley and Rotherham — with professional surveys, guano clearance, spike installation, netting, wire systems, Bird Free gel and solar panel proofing. All work is compliant with the Wildlife and Countryside Act 1981.

Contact Apex Pest Control Ltd for a roof pigeon survey.