Moss & Algae Treatment
Jet washing removes the visible moss, algae and lichen from a surface — but it doesn’t kill the microscopic spores embedded deeper in porous materials. Without treatment, regrowth starts within weeks or months depending on the aspect, shade and local conditions. In Hertfordshire’s damp climate, north-facing or shaded surfaces can look as bad as before within a year.
Our moss and algae treatment involves applying a specialist biocide solution to a cleaned surface. The biocide penetrates deep into the pores and kills spores that the pressure wash couldn’t reach. It continues working for months afterwards — significantly extending the time before the surface needs cleaning again. It’s the most cost-effective thing you can add to any exterior clean.
Price confirmed before we start. What we quote is what you pay.
Michael Brown
Starting price
Treatment lasts
Happy customers
Covered
Surfaces we clean
We check the surface is clean and dry before applying treatment. Biocide is only effective when applied to a properly cleaned surface — we never cut corners on preparation.
Specialist biocide solution is applied evenly across the entire surface area. We use professional-grade products proven to kill algae, moss and lichen spores effectively.
The biocide needs dwell time to penetrate the surface. We apply it correctly and check coverage across the whole area before leaving — it's not a spray-and-go job.
We'll let you know what to expect — including how the treatment works, what to avoid in the days after application, and when to expect results. We don't leave without a proper handover.
How it works
Pricing
Choose the right clean for your property — or let us recommend one when we quote.
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