Professional biocide treatments for render across Yorkshire. Long-lasting protection that prevents algae regrowth and keeps your render cleaner for 12 months to 3+ years.
Why biocide treatment is essential for long-lasting results
Keeps render cleaner for 12 months to 3+ years depending on exposure
Kills algae spores and prevents new organic growth from establishing
Extends time between cleanings, saving money in the long run
Professional-grade products applied safely by trained technicians
Bonds to render surface and withstands Yorkshire weather conditions
No visible residue or colour change, just clean protected render
Professional biocide treatment goes far beyond simple cleaning. It provides long-term protection that keeps your render looking clean and prevents costly repeated cleanings.
Biocide solution penetrates into the porous render surface, not just coating the top
Eliminates algae, moss, and lichen at the cellular level, including spores
Forms a protective barrier that prevents new organic growth from establishing
Continues working for years, gradually releasing active ingredients

Complete render cleaning and protection for Yorkshire properties
Safe soft washing for all render types including K-Rend and pebbledash
Remove red, green and black algae staining from all render types
Expert strategies to keep your render cleaner for longer
Professional soft washing for homes across Yorkshire
Large-scale render cleaning for businesses and commercial properties
Common questions about biocide treatment
Biocide treatment is a professional-grade solution that kills organic growth (algae, moss, lichen) and prevents regrowth. Unlike simple cleaning, biocide penetrates the render surface and continues working long after application. It kills existing algae at the cellular level and creates a protective barrier that prevents new spores from establishing. The treatment bonds to the render and gradually releases active ingredients over 12 months to 3+ years.
In Yorkshire climate, professional biocide treatment typically lasts 12 months to 3+ years. North-facing walls and heavily shaded areas may need retreatment sooner due to constant dampness. South-facing walls in full sun can stay protected for longer. We recommend retreatment when you notice algae starting to return.
Yes, when applied by trained professionals. We use professional-grade biocides that are safe when used correctly. During application, we cover plants and keep pets indoors. The products become inert once dry (usually 2-4 hours). After drying, treated surfaces are completely safe for children and pets.
While DIY biocide products are available, professional application is much more effective. We use commercial-grade products that are stronger and longer-lasting than retail versions. We know the correct dilution rates, application methods, and dwell times for different render types. Professional treatment costs more initially but lasts much longer than DIY attempts.
No, professional biocide treatment is invisible once dry. It doesn't change the colour, texture, or appearance of your render in any way. What you will notice is that your render stays cleaner and brighter for much longer. The biocide itself leaves no visible residue or discolouration.
55 5* reviews on Google • 62 5* reviews on Facebook
"Absolutely fantastic service! The team at Aqua-Blasters transformed our driveway - it looks brand new. Professional, punctual, and the results speak for themselves. Highly recommend!"
"We've used Aqua-Blasters for both our home and business premises. Their attention to detail is outstanding, and they always leave the area spotless. Best exterior cleaning company in Yorkshire!"
"The soft washing service on our render was incredible. Years of dirt and algae gone in one session. The team was friendly, efficient, and very reasonably priced. Will definitely use again!"
"Professional from start to finish. They cleaned our patio, driveway, and gutters. Everything looks amazing! Great communication and fair pricing. Couldn't be happier with the results."
"Aqua-Blasters did an excellent job on our commercial property. The building looks pristine and the service was completed with minimal disruption to our business. Highly professional team!"
Professional exterior cleaning across 104+ locations in Yorkshire and surrounding areas.
And many more areas across Yorkshire — call us to check your location
Certified professionals with industry-leading accreditations and partnerships



Get a free quote for professional biocide treatment across Yorkshire