Roof Cleaning in North Brisbane & the Sunshine Coast

Black streaks (gloeocapsa magma), green moss and orange lichen feed on roof minerals and trap moisture. Over time that constant wetting cycles freezes and thaws bedding, lifts roof paint, and accelerates rust on metal roofs. Cleaning every 3–5 years adds years to the roof's working life.

Brute-force high-pressure cleaning can crack ridge caps and strip glazed terracotta. We use a controlled, low-pressure soft-wash on tile and a measured pressure clean on Colorbond, paired with a biocidal treatment that kills the spores so regrowth is slowed by 12–18 months.

• Pre-wet and protect surrounding gardens and water tanks
• Apply roof-safe biocide and dwell to kill moss and lichen
• Soft-wash or measured pressure clean depending on substrate
• Clear gutters and downpipes of dislodged debris
• Final rinse and inspection for any cracked tiles to flag for repair

Many Sunshine Coast and rural North Brisbane properties run rainwater tanks. We isolate downpipes before cleaning, divert the first flush of contaminated water away from the tank, and use biocides that break down safely once flushed — no residues left on the roof to enter the tank on the next storm.

If the existing roof paint is sound and the colour is still acceptable, a clean is the right call. If the membrane is chalking, flaking or 15+ years old, you'll spend the same money twice — clean now, restore in a year — so a full roof restoration is the better value option.