Birds nest under solar panels because the gap between the panels and the roof is warm, sheltered and hidden. The fix is to clean out what’s there and then close the gap with humane mesh, spikes or netting. Order matters. Cleaning comes first, proofing second.
Here’s how that works, and why we’d steer you away from doing it yourself.
Why do birds nest under solar panels?
A solar array makes a roof-top shelter. The panels shade the roof, block wind and rain, and sit just far enough off the surface for a pigeon or sparrow to squeeze in. The roof underneath also stays warm. To a bird, it looks like a ready-made nest site.
Once one pair settles in, others tend to follow. A small bit of nesting material in spring can turn into a full colony by the next season. Homes in Porter Ranch and Valencia, with long tile roofs and big arrays, see this a lot, and so do homes near open hillside in Simi Valley.
What problems do birds cause?
The mess they leave behind causes most of the trouble.
- Droppings that dirty the panel glass, leave stubborn marks and pile up on the roof below
- Nest material packed into the gap, which can build up around wiring
- Debris that holds moisture against metal and roofing
- Noise, mess and smell around patios, windows and walkways
Droppings can corrode metal over time, and nests are hard to remove once they’re packed in. We’re not electricians, so for anything about the wiring itself, call a solar installer. What we can do is clear the debris and report what we see.
What are the signs of nesting?
Look for these before it gets bad.
| What you see | What it usually means |
|---|---|
| Birds going in and out at the panel edge | There’s a gap they can use |
| Twigs, straw or feathers sticking out below the array | A nest is already built |
| White streaks or piles of droppings on the roof or glass | Birds are roosting there regularly |
| Scratching, cooing or chirping from the roof | Active nesting or roosting |
| Droppings on a patio or walkway below the roof edge | A roost sits above |
Spring is when nesting picks up, so check your roof in late winter.
What are the three ways to proof an array?
We use three humane methods, and the choice depends on your roof.
Mesh. A strip of mesh runs around the edge of the array and closes the gap between the panels and the roof. Birds can’t get in, so there’s nowhere to nest. This is the most common fix for under-panel nesting.
Spikes. Spikes go on ridges, rails and ledges where birds like to land. They don’t harm the bird. They make the spot uncomfortable to perch on, so the bird moves on.
Netting. Netting covers larger or more open areas that mesh and spikes can’t, like a patio cover or a gap along a roofline.
Many homes need a mix. Mesh on the panel perimeter, spikes on the ridge. We look at the array and recommend what fits. More detail is on our bird proofing page.
Why clean first and proof second?
If you seal a nest, droppings and debris under the panels, you’ve trapped the problem. It keeps attracting pests and holding moisture, and it’s harder to reach later.
So we clear the nesting debris, clean the area, and then install the mesh, spikes or netting. We also hand clean the panel glass with soft brushes and purified water, the same way as in our solar panel cleaning. A clean array with a sealed edge is the goal.
Is bird proofing humane and legal?
It’s humane when done right. We don’t trap, poison or harm birds. The point is to stop them settling in.
Timing matters too. Some birds are protected, and removing an active nest is not something to take lightly. If you can see eggs or chicks in a nest, don’t disturb it. Call us, and we’ll talk through what makes sense and when. If you’re unsure about the rules for a particular bird, check with your local wildlife authority.
Can I do it myself?
You can, but there are good reasons many people don’t.
- Roofs are slippery, and tile breaks underfoot. Falls are the real risk.
- Panels are glass on a frame. Stepping or leaning on them can damage them.
- Mesh installed with the wrong fasteners can damage roofing or panel frames.
- Nests and droppings can be unpleasant to handle. Wear protection if you try.
- Poorly fitted mesh leaves gaps, and birds find gaps quickly.
We work on roofs daily, and we’re Licensed & Insured. We’ll step carefully on tile, and we’ll tell you what we find.
When is the best time to proof?
Before nesting season, which ramps up in spring. Late winter is a good window, and so is fall, as part of our before-the-rains checklist. Birds can nest at other times of year too, so don’t wait if you notice activity.
If you also have dark streaks on the roof, our roof algae guide explains what those are and how we handle them.
What happens during a visit?
We look at the array from the roof edge and note where birds are getting in. If there’s nesting debris, we clear it and clean the area. Then we clean the panel glass by hand and install the mesh, spikes or netting that fit what we saw.
Afterward we tell you what we found and what we did. If we see something outside our work, like a damaged panel or loose wiring, we’ll point it out so you can call the right person. We don’t repair solar equipment.
If your system already has mesh that’s pulled loose or bent, send a photo. A small gap is all a bird needs.
Get an assessment and free estimate
The assessment and estimate are free. Send photos of the array and the roof edge, or have us look. We serve homes from Chatsworth to Thousand Oaks and Santa Clarita. Call (818) 913-1626 Monday through Saturday, 7am to 7pm, visit our bird proofing page, or check the cities we serve.