Pigeons under your solar panels: why it happens and how to stop it

Why your array looks like prime real estate

Feral pigeons in the Valley evolved to nest on cliff ledges. A solar array gives them something better: a roof over their heads, a few inches of shaded space, protection from hawks and owls, and a surface that stays warm through cooler nights. Add a reliable water source nearby, like pools, misters, irrigation and pet bowls, and your roof checks every box.

Once one pair settles in, others follow. Pigeons are drawn to spots where pigeons already live, and they reuse the same nests year after year. In Phoenix they can breed through much of the year, so a small problem in spring can become a crowded colony by the end of summer.

What we usually find when we lift a panel, and why it matters

Homeowners are often surprised by how much material is under an array that has hosted pigeons for a season or two. The droppings are the obvious part. The less obvious part is what that buildup does to the roof and the system around it.

Bird droppings are acidic and they hold moisture. On a tile roof, nests and debris fill the channels that are supposed to carry water down and off the roof. During a monsoon storm, that water backs up, finds the edges of the tiles and reaches the underlayment, which in Valley heat may already be getting brittle after 20 years or so. On foam or coated flat roofs, the droppings break down the coating and hold water against it.

Panels themselves are not usually hurt by the birds, but the wiring under them can be. Exposed cables get pecked, pulled at and covered in debris, and droppings on the glass cut production. The smell and noise are the parts neighbors notice. The roof damage is the part that costs money if it goes on for a few years.

• Packed nests of twigs, feathers and droppings several inches deep
• Blocked tile channels and clogged scuppers, gutters or downspouts
• Stained and etched tile or coating under the nests
• Chewed or displaced wire coverings and loose conduit clips
• Eggs, dead birds and a lot of flies in summer

Is it a pigeon problem or something else?

Not every bird under an array is a pigeon. House sparrows and grackles also tuck into small gaps, and their nests are smaller but still block drains. Roof rats are a different issue entirely, and they like the same shaded space. The signs differ: pigeons leave heavy white droppings and cooing at dawn, while rats leave small dark droppings, gnawed wire coverings and scratching sounds in the attic at night.

It is worth knowing which one you have before choosing a fix. Mesh stops birds well, and it also discourages rats from using the array as a highway, but rats that are already in the attic need their own entry points found and sealed. When we inspect an array, we look at both and tell you what we see.

Things that don't work very well

Fake owls, spinning reflectors and spikes along the panel edges all show up in garages across the Valley. Pigeons usually figure out a plastic owl within days. Spikes can deter birds from landing on the top of a panel, but they do nothing for the gap underneath, which is where the nest lives. Gels and sprays wear off quickly in 110 F heat and can stain tile.

The other common mistake is chasing birds out without cleaning up or closing the opening. If the nests stay, the same birds come back. If the gap stays open, new birds move in. And blocking the opening with birds or eggs still inside creates a different problem, so timing and an inspection matter.

How bird proofing actually works

The approach that holds up is simple: clean the space, then close it. We start by checking for active nests and birds, removing nests, droppings and debris from under the panels, and rinsing the roof surface and drains. Then we install a galvanized or coated wire mesh around the perimeter of the array, held in place with clips that attach to the panel frame. Nothing drills into the panels or the roof.

The mesh is trimmed to follow your roof profile, which matters a lot on tile, where the gap varies along every course. Done right, it is hard to see from the street and still lets air move under the panels so they stay cool. Our solar bird proofing service covers the cleanout, sanitizing and screening in one visit on most homes.

Costs and timing for a typical Valley home

Most Phoenix-area bird proofing jobs for a residential array land roughly between $685 and $1,940, depending on panel count, the length of exposed edge, how many nests need removal, roof type and how steep or high the roof is. Heavy infestations with damaged tile or clogged drains cost more because those repairs come first.

Spring and fall are good times to do the work, when birds are less settled and the roof is more comfortable to stand on. If the roof under the array also needs attention, plan the screening around that. When panels come off for a solar detach and reset, it is the easiest moment to clean and repair underneath, then install the mesh on the way back up.

Keeping them from coming back

After the array is sealed, pigeons usually try other spots on the house: under tile at the eaves, inside open rake ends, on ledges above the patio. Close those gaps as you see them, and remove easy water and food sources where you can, such as spilled bird seed and pet food left outdoors.

Take a quick look at the mesh once or twice a year, and especially after a haboob or monsoon wind, since a bent section is all a determined bird needs. If you are still planning solar, read what to fix before panels go on and ask for the screening at installation. If pigeons have already moved in, call (602) 878-3594 any hour and we will look at the array and the roof under it.

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