Render Cleaning in Rockbank

Yes, but only with soft-wash chemistry and low pressure (under 500 PSI). High-pressure fan tips on render are the most common cause of paint lift and render cracking in Melbourne — water enters under the paint film or into micro-cracks and the finish deteriorates rapidly. We use detergent pre-treatment to do the heavy lifting, with water as a gentle rinse rather than a blasting tool.

Mould on render is treated with a biocide-based soft-wash solution that kills the root system and then rinses off. A water-only rinse will clean the visible mould but leave the spores behind — they recolonise within months. The biocide extends the result significantly. On south-facing or shaded walls where mould grows persistently, annual treatment is usually more effective than one aggressive clean.

Not with the right method. Soft-wash chemistry at low pressure preserves the paint film. Problems arise when operators use turbo nozzles, overly alkaline detergents or high-pressure fan tips on acrylic paint — all of which can lift or dull the finish. We assess the paint type and condition before starting.

Acrylic render has a paint-like binder mixed into the finish coat — it is flexible and resistant to cracking but sensitive to high pressure and strong chemicals. Cement render is harder, more porous and tolerates slightly more pressure, but it is also more likely to wick moisture and grow mould. The cleaning method changes for each, and we identify the render type before choosing chemistry.

Yes. We mask glazing and window frames before any chemical application, and we rinse windows thoroughly after the clean. We also avoid directing spray into weep holes, window head flashings and any joins where water could track inside the wall.

Render cleaning is quoted as a written fixed price from your photos. Facade area, storeys, access and how heavy the mould is all change the work. Multi-unit or strata rendered buildings are scoped per site. Send photos and the approximate wall area.

Every 18–36 months for most Melbourne properties. South-facing or shaded rendered walls that get minimal sun may need annual treatment. Melbourne's wet winters and warm humid summers accelerate mould and algae growth on render, especially on properties near parks or with established tree canopy.