How often should you clean your roof in Queensland?
Most Queensland roofs benefit from a clean every two to three years, and more often if the roof is shaded, tree-covered or in a humid spot. Sunny, open roofs can often go longer. Clean sooner if you can see dark streaks, moss or lichen.
Queensland's warm, humid weather is ideal for moss, lichen and algae. Left alone, they hold moisture against the roof and make it look tired well before its time. How often to act depends on the roof and where it is.
Signs your roof is due
- Dark streaks running down the roof, usually the first sign of algae
- Green or grey patches of moss or lichen, especially on south-facing or shaded slopes
- Leaf litter and debris stuck in valleys and against the gutters
- A roof that looks noticeably darker or patchier than your neighbours'
How often, by situation
- Under trees, shaded or humid: check every year or two.
- Open, sunny roofs: every two to three years is usually enough.
- Near the coast: salt and humidity encourage growth, so keep an eye on it.
Why method matters
High pressure can strip the surface of tiles, lift them or force water under them. A soft wash uses a low-pressure rinse and a cleaning solution that treats the growth at the root, so the roof is cleaned without being blasted. That's also why growth takes longer to return.
Tile and metal roofs
Concrete and terracotta tiles and Colorbond or older metal roofs each need their own approach. Tiles can be slippery and fragile underfoot, and metal roofs are very slippery when wet.
Don't do it yourself
Falls from roofs cause serious injuries. Roof work needs appropriate access and safety equipment, so it's one to leave to professionals. While they are up there, have the gutters cleared too, because debris from the roof ends up in them.
Questions, answered
Will cleaning my roof make it last longer?
Removing moss and lichen stops them holding moisture against the roof, which helps protect it. It won't fix damage, so if you see cracked or lifted tiles, speak to a roofer.
Is a roof clean worth it before selling?
It's one of the quickest ways to improve how a home looks from the street, so it's a common pre-sale job.
Can moss damage tiles?
Moss holds moisture and can lift tile edges over time, so it's worth treating before it takes hold.
Need roof cleaning?
Get a clear, itemised quote, usually within one business day.
