If you’ve noticed your roof looking dark, patchy, or covered in green or black growth, you might be wondering whether soft washing could damage your tiles or Colorbond. Here’s what you need to know.
Is Soft Washing Safe for Roof Tiles?
Yes – soft washing is the recommended method for cleaning roof tiles, and is far safer than pressure washing. Concrete and terracotta roof tiles have a surface that degrades over time. High-pressure washing accelerates this degradation, stripping the protective surface layer and forcing water up under tiles where it can cause internal damage and leaks. Soft washing uses low pressure comparable to a garden hose, so there’s no risk of surface damage.
Is Soft Washing Safe for Colorbond Roofs?
Yes. Low-pressure soft washing is perfectly safe for Colorbond and other metal roofing. High-pressure washing on Colorbond can dent the surface, remove the paint coating, and void your warranty.
What Do the Cleaning Solutions Do?
The soft wash solutions we use are biodegradable and designed to kill organic matter – mould, algae, lichen, and mildew – at the root. This is the key difference from pressure washing: soft washing eliminates the growth rather than just removing its visible appearance. Results typically last 2-3 years compared to a few months for pressure-washed roofs.
Will It Harm My Garden or Pets?
The solutions we use are biodegradable and safe once dry. We protect garden beds and lawn areas during application, and the typical wait time before children and pets return is 30-60 minutes after application.
Book a Roof Clean
A clean roof lasts longer. Lichen and moss hold moisture against your tiles and cause significant degradation over time. Call Soft Wash Brisbane on 0412 650 511 or request a free quote.

