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Black Staining on Render: Causes and Safe Cleaning
Why Black Staining Appears on Render Black staining on render is usually caused by biological growth, most commonly algae, cyanobacteria, mould, mildew and other airborne microorganisms that colonise damp exterior surfaces. On UK properties, it is especially common on shaded, north-facing or poorly ventilated elevations where render stays wet for...
How Long Does Render Cleaning Last? UK Guide
How Long Does Render Cleaning Last? Render cleaning typically lasts between 12 months and 5 years, depending on the type of render, the cleaning method used, the level of biological growth, the building’s exposure, and whether a suitable biocidal treatment is applied after cleaning. In practical terms, a correctly softwashed...
