Roof Cleaning Canberra

🌿Why Canberra roofs grow so much moss

It comes down to shade and damp. Canberra's mature tree canopy keeps southern roof faces cool and wet for much of the year, and the cold winters mean moisture lingers rather than drying off. That's perfect moss-and-lichen territory. Left alone, the growth holds water against the tiles, works into the surface, and accelerates wear — which is why cleaning isn't just cosmetic, it's protective. Roofs under heavy canopy in suburbs like the Woden Valley and Inner North need it most.

🗓️How often should you clean a Canberra roof?

🚿Pressure or soft washing — the right method for your roof

Not every roof wants the same treatment, and using the wrong one does damage. Sound concrete tile handles high-pressure washing, which strips moss, lichen and chalked old coating fast. Fragile, brittle or heritage roofs — and a lot of terracotta — want gentler soft washing: a low-pressure treatment that lifts growth without driving water under the tiles. Metal needs a low-impact wash that won't scratch the finish. Matching the method to the surface is the whole skill, which is why we assess first rather than just reaching for the highest pressure.

• ✔️High-pressure — sound concrete tile, heavy moss and chalked coating
• ✔️Soft washing — fragile, heritage and most terracotta roofs
• ✔️Low-impact metal wash — Colorbond and Zincalume, without scratching

🧽Cleaning is step one of every restoration

A coating only bonds to a clean, sound, dry surface — so cleaning isn't an optional extra before a restoration, it's the foundation the whole job stands on. Coating straight over moss, grime or a chalked old surface is the single most common reason 'restorations' fail around Canberra. We clean back to a genuinely paintable surface every time, and treat the growth at the root so it's slower to return, before any primer or colour goes near the roof.