Folkestone & Kent • Fully Insured
Green algae, red streaks and black staining make render look tired — and jet-washing it will wreck it. We soft wash render safely, killing the algae at the root and leaving walls clean, even and undamaged.
Real Results
A real Kent job — algae-stained render soft washed back to a clean, even finish. No high pressure, no damage.



Why It Matters
Render is porous, so in Kent's damp coastal air it quickly picks up green algae, red and orange streaking and black spotting — especially on north-facing and shaded walls. Left alone it spreads and makes even a well-kept house look tired and neglected. A soft wash clears it and, crucially, treats the spores so it stays clean far longer.
We clean render and walls across Folkestone, Hythe, Sandgate, Hawkinge and the surrounding Kent areas.
What's Included
Important
This is the big one. High pressure will blow the surface off render, crack it, force water behind it and leave permanent patchy marks — an expensive mistake. Render must be soft washed: low pressure plus a biocide that does the work chemically rather than by force. That's exactly how we clean it, so your walls come up clean and undamaged. The same low-pressure approach applies to roof cleaning; for hard surfaces see our pressure washing page.
Surfaces We Clean
K-rend and silicone/monocouche render, traditional and painted render, pebbledash, brickwork and masonry. Painted surfaces are handled gently so the finish isn't stripped, and we match the treatment to the wall.
How We Work
Common Questions
No — and you shouldn't. High pressure damages render, cracks it and forces water behind the surface. Render must be soft washed: low pressure with a biocide treatment that kills the algae chemically. That's how we clean it, safely.
It's algae and organic growth thriving in damp, shaded conditions — very common on Kent's coast, especially on north-facing walls. Our biocide treatment kills it at the root rather than just wetting the surface, so it doesn't come straight back.
No. Painted render and masonry are soft washed gently so the finish isn't stripped. We match the approach to your wall.
K-rend, silicone and monocouche render, traditional and painted render, pebbledash, plus brickwork and masonry.
Because we treat the spores rather than just rinsing the surface, render stays clean much longer than a wash alone. How long depends on shade and exposure, but you'll get a good few years before it needs looking at again.
Yes — Sharps Exterior Cleaning is fully insured with £5,000,000 public liability cover and is a Checkatrade-approved member.
No-obligation quote, covering Folkestone and all across East Kent.