Yes. A roof with solar panels can be cleaned by working around the panels: tiles around and below them are hand-cleared, soft-washed at low pressure and treated with a biocide. Panels are never stood on or leaned on. Tell us about them when you ask for a quote so we can plan access.
Do solar panels make roof cleaning harder?
A little. They cover part of the roof, block some access routes and need care around their frames and cables. None of that stops a clean; it just means planning. We look at where the panels sit, how close they are to the ridge and edges, and how we’ll reach the tiles around them.
Can you clean under the panels?
Not fully. Tiles directly under the panels are covered, so they can’t be cleaned without removing the panels, which is a job for a solar installer. In practice, the tiles under panels are shaded from the sun but also sheltered from rain, so growth there is often limited. The visible tiles around the panels are what make a roof look clean or dirty.
Will moss grow around solar panels?
It can. The edges of a panel array create shade, and debris can collect where the panels meet the tiles. Moss and leaves along the bottom edge are common. We clear these by hand and treat the tiles around the array.
Will the cleaning solution harm my panels?
We keep the solution on the tiles and avoid spraying the panels. If any spray reaches a panel, it’s rinsed off. If you want the panels cleaned too, that’s a separate job; tell us and we’ll let you know what we can help with.
What about birds under the panels?
Pigeons often nest in the gap under solar panels. Active nests of wild birds are protected by law, so we won’t disturb a nest that’s in use. If birds are nesting under your panels, mention it when you ask for a quote. Bird-proofing panels is something solar installers and pest specialists offer.
Will roof cleaning affect my panel warranty?
We don’t touch the panels, fixings or wiring, and we never stand or lean on panels. If you’re unsure about the terms of your panel warranty, check your installer’s paperwork before booking.
What should I tell you when I ask for a quote?
- That you have solar panels, and roughly where they are on the roof.
- Whether there are birds nesting under them.
- Any other roof equipment: aerials, satellite dishes, roof windows, vents.
- A photo from the garden or the street, if you can.
What about roof windows and skylights?
Roof windows and skylights are cleaned around carefully, with attention to the seals and flashings. The tiles around them are hand-cleared and treated like the rest of the roof.
Is it worth cleaning a roof that is half covered in panels?
Often yes. The tiles you can see still hold moss, fill gutters and make the roof look tired. And if moss builds up along the bottom edge of the array, it can trap debris and water. A clean and treatment keeps the visible roof and the gutters in good order.
Should I clean my roof before solar panels go on?
It’s worth considering. Once panels are fitted, the tiles beneath them can’t be cleaned without removing them. If the roof has moss now, cleaning and treating it before installation means fewer problems later. Talk to your installer about timing.
Do solar panels make moss worse?
Around the edges, sometimes. Panels shade the tiles just below them and slow down water and debris at the bottom edge. That’s where growth tends to start. A treatment after a clean helps keep those edges clear.
Can moss on the tiles affect solar panel output?
Moss on the tiles doesn’t shade the panels. Dirt, bird mess and moss on the panels themselves would, and that’s a separate cleaning job for the panel glass. If your panels need cleaning, ask the installer or a specialist what they recommend for your system.
Does it matter what kind of roof the panels are on?
A little. On concrete tiles, panels are fixed with hooks under the tiles, so we take care not to disturb tiles near the fixings. On slate and clay, the tiles around the fixings can be more fragile still. We look at the roof first and plan our access around the array, not across it.
What about in-roof panels?
Some newer homes have panels set into the roof rather than on top of the tiles, with flashing kits around them. The tiles around the edges are cleaned the same way, with extra care at the flashings, which are what keep the roof watertight.
What if the panels are on a flat roof or a frame?
Panels on frames on a flat roof or on the ground are a different setup. Flat roofs collect debris around the frames and need clearing to drain properly, which may be a roofer’s job. We’ll tell you what we can help with once we’ve seen a photo.
In short
- Yes, roofs with panels can be cleaned.
- We work around panels and never stand or lean on them.
- Tiles under panels can’t be reached without removing them.
- Tell us about nesting birds and other roof kit when you ask.
Next step
Send us a photo of the roof with the panels and your postcode, and we’ll plan the job and give you a free quote. Or read more about our roof cleaning.
