Why Do Conservatory and Orangery Roofs Go Green? (And How to Fix It)
That green tinge creeping across your conservatory or orangery roof isn't just an eyesore — it's algae, moss, and lichen building up over time, and left untreated it causes real damage.
Here's what's happening and how to fix it.
What's Causing the Green?
Conservatory and orangery roofs sit at a shallow angle and rarely get direct rainfall to wash them clean. That makes them a perfect breeding ground for algae and moss, especially in shaded areas or where trees are nearby.
It builds up slowly. Most homeowners in Cannock, Hednesford, and Burntwood don't notice it until the roof has turned noticeably green or the room starts feeling darker than it used to.
Is It Just Cosmetic?
No — and this catches a lot of people out.
Algae and moss trap moisture against the panels. Over time that moisture works its way into seals and joints, accelerating wear and eventually causing leaks. The longer it's left, the more damage builds up underneath what looks like surface-level grime.
Getting it cleaned early is always cheaper than replacing panels or resealing joints later.
How We Clean Conservatory Roofs Across Cannock and Staffordshire
We use a specialist soft wash treatment — no pressure washing, no ladders resting against your roof panels, no risk of cracking or seal damage.
The process removes algae, moss, and lichen completely and includes a biocide treatment that slows regrowth significantly. By the time we're done, all windows and frames are cleaned as standard — so your entire conservatory cleaning looks as clean and fresh as possible, not just the roof.
We cover Cannock WS11, Hednesford WS12, Burntwood WS7, Heath Hayes WS12, and all surrounding areas across Staffordshire.
What About Orangery Roofs?
Orangeries are different in design to conservatories — typically a solid roof with glass panels or a glass lantern section — but they face exactly the same problem. Algae and moss build up on the glass panels and frames, blocking light and trapping moisture against the seals.
We clean orangery roofs using the same specialist soft wash process, taking extra care around the solid roof sections and frame joints. The results are just as dramatic.
How Often Should a Conservatory or Orangery Roof Be Cleaned?
Most roofs in this area need cleaning every 12 to 18 months. If you're surrounded by trees or your roof faces north, you may need it more frequently.
A quick visual check each spring is all it takes — if it's starting to look green, don't leave it until autumn.
Frequently Asked Questions
How often should a conservatory or orangery roof be cleaned?
Most roofs in the Cannock area need cleaning every 12 to 18 months. If your roof is heavily shaded or surrounded by trees, once a year is safer. A quick visual check each spring tells you everything you need to know.
Can I clean my conservatory roof myself?
We'd advise against it. The soft wash chemicals we use require specialist application, and working at height on a sloped roof without proper equipment is a significant safety risk. Professional cleaning also includes a biocide treatment that slows regrowth — something you can't replicate with a garden hose.
Do you clean orangery roofs as well as conservatories?
Yes — we clean both. Orangery roofs with glass lantern sections or flat glass panels respond just as well to soft wash treatment as polycarbonate conservatory roofs. If you're unsure which type you have, just send us a photo and we'll advise.
