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Render Cleaning: Removing Organic Growth Without Paint Damage

Soft-wash chemistry kills mould and lichen on render without the paint flaking.

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Illustrative image (not a Spotless job): Render Cleaning: Removing Organic Growth Without Paint Damage
Illustrative image — not a photo of a Spotless job.

This Restoration article is written for Melbourne owners and managers who need more than a quick blast. Render Cleaning jobs in our city require a surface diagnosis before any cleaning starts.

In Melbourne, everything from growth corridor new-build mortar smear to inner-suburb heritage brick has its own cleaning risk profile. The right method, chemistry and pressure keep the surface safe and the result lasting.

Soft wash is essential

Painted render flakes under high pressure. Soft wash uses chemistry alone.

Biocide dwell time

15–30 minutes contact time for full mould kill — rushing makes it return faster.

Final rinse low pressure

Maximum 500 PSI rinse — anything more risks paint adhesion.

On the job

  • Understand why soft wash is essential matters before you choose a cleaner.
  • Understand why biocide dwell time matters before you choose a cleaner.
  • Understand why final rinse low pressure matters before you choose a cleaner.

Melbourne brick & exterior cleaning

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