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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 to Clean Render Without Damage: Softwash Guide
How to Clean Render Without Damage Render should usually be cleaned with a low-pressure softwashing process, not aggressive pressure washing. The safest method is to identify the render type, assess the staining, protect sensitive areas, apply the correct cleaning solution at the right strength, allow suitable dwell time, gently agitate...
Render Cleaning Myths: Safe Methods for UK Walls
Render Cleaning Myths Explained: What UK Contractors, Facilities Managers and Serious DIY Users Need To Know Render cleaning is often misunderstood. The biggest myth is that dirty render simply needs more pressure, stronger chemicals or a quick coat of paint. In reality, most render staining in the UK is caused...
Softwash Surfactant: Stop Patchy Results
Why Softwash Solutions Fail Without a Quality Surfactant Softwash solutions often fail without a quality surfactant because the active cleaning chemistry cannot wet, cling to, penetrate or remain in contact with the contaminated surface for long enough to work properly. On roofs, render, cladding, patios and painted surfaces, contaminants such...
Softwashing Dwell Time: Improve Results Safely
How to Improve Dwell Time During Softwashing To improve dwell time during softwashing, you need to keep the cleaning solution active on the surface for long enough to break down organic growth, staining and biofilm without allowing it to dry out, run off too quickly or become over-diluted. In practice,...
