Acrylic pre-mixed renders have seen a surge in popularity among builders and developers over the past decade. These modern coloured renders are more durable and water-resistant than traditional sand and cement finishes. Their breathable, textured surface offers long-lasting performance—but also creates the perfect environment for moss, algae, and other organic growth, especially in the damp and variable British climate.
Over time, this biological matter can lead to unsightly green, black, or yellow staining that not only detracts from the building’s appearance but can also reduce the lifespan of the render if left untreated. Early intervention is key.
Why High Pressure Is Not the Answer
It’s important not to use high-pressure washing on coloured or acrylic renders. The force of high-pressure water can strip away the surface, damage the finish, and lead to costly repairs. Instead, we use the DOFF steam cleaning system—a highly effective method that combines low pressure with high-temperature steam to gently but thoroughly clean render surfaces without causing any damage.
The DOFF system is especially effective at:
Removing moss, algae, and lichen
Lifting stains caused by pollution or organic growth
Preserving the integrity and colour of modern render finishes
Softwash Treatment for Long-Term Results
In addition to steam cleaning, we also offer softwash render cleaning—a process that applies targeted biocidal treatments to eliminate spores and prevent regrowth. This can involve:
Fungicidal washes to kill off algae and mildew
Bleach-based biocides for faster results where needed
Both approaches are safe for use on all modern render types and provide long-lasting cleanliness with minimal disruption.
Safe Access and Expert Execution
No matter how challenging the access, our team is equipped to handle it. We use a range of professional techniques
Unit 3, Concord Park,
Concord Way,
Fareham,
PO15 5FG
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Registered Address: Unit 1, 48 Willis Way, Poole BH15 3TB | Deliveries to: Unit 3, Concord Park, PO15 5FG
Benington Commercial Ltd trading as Arrow Building Care | Company No. 09151020 | VAT No. 338868349 |Registered in England and Wales