Terracotta concrete tile roof on a Gold Coast residential property restored from heavy mould staining via soft wash treatment. Even colour return across the full roof surface and ridge capping, completed alongside an existing solar installation.
Before & After
What We Did
Roof inspection & solar protection
Inspected tile and ridge capping condition, confirmed soft wash suitability, and prepared runoff management around the existing solar panels.
Biocide application & dwell
Applied soft wash biocide solution at low pressure across the full roof. Allowed dwell time for the chemistry to break down embedded mould and biological staining.
Multi-pass cycle
Repeated chemical application, dwell, and controlled low-pressure rinse cycles across the roof to clear the depth of contamination.
Final rinse & gutter clear
Final low-pressure rinse to flush all dead organic matter clear of the roof, followed by clearing flushed debris from the gutter line.
The Result
The roof was restored to clean, uniform terracotta finish across all tile faces and ridge sections, with the existing solar installation unaffected by the work.
Soft wash roof treatments typically resist mould and lichen regrowth for 2–4 years in South East Queensland conditions.
Suitable For
Soft washing preserves tile integrity and mortar while delivering longer-lasting results than high-pressure cleaning. Solar-equipped roofs need an operator who manages runoff carefully.
This Gold Coast home had a terracotta tile roof carrying heavy mould staining across the surface — the standard pattern for porous tile roofing in humid coastal climate. The roof was also solar-equipped, which adds a runoff management consideration to the standard soft wash workflow.
Multi-pass soft wash treatment cleared the embedded contamination and returned the tiles to even terracotta colour, with the solar installation protected throughout. The result is uniform finish across the full roof and ridge sections, with no high-pressure damage to tiles or mortar.
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