Soft washing — the gentle way to clean render
Soft washing is how render should be cleaned. It uses low pressure and the right cleaning solution that kills algae, lichen and black staining at the root — instead of blasting the surface and hoping. It is the method the render manufacturers recommend, and the one we have used across the Midlands for over 25 years. You get a fixed price, before-and-after photos, and a finish that lasts.
What soft washing is
Soft washing is a low-pressure cleaning method. Instead of relying on force, it uses a cleaning solution — a biocide — to kill the living growth that stains render and other outdoor surfaces. The solution does the work. The water is only there to rinse, at a gentle pressure no stronger than a garden hose.
That matters because the green, black and red staining on render is alive. It is algae, lichen and mould. Blasting it just knocks the top off and leaves the roots behind, so it grows back fast. Soft washing kills it properly, which is why the clean lasts far longer.
How soft washing is different from pressure washing
A pressure washer cleans by force — a high-pressure jet that scours the surface. On hard, tough surfaces that can be fine. On render it is a problem: the surface is soft and open, so the jet tears at it, strips the colour and drives water into the wall. Soft washing does the opposite. It is gentle on the surface and hard on the growth, because the chemistry, not the pressure, does the cleaning.
What soft washing can clean
We soft wash every render type — K-Rend, monocouche, painted render and Weber and other silicone renders. The same gentle approach also suits soffits, fascias and rendered boundary walls. Whatever the surface, we test it first and match the solution strength to it.
Why we never blast render
A pressure washer feels powerful, and that is exactly the problem on render. High pressure water forces moisture behind the render and tears at the soft surface. On through-coloured renders it strips the colour and leaves pale, blotchy scars that cannot be undone.
It also only knocks the top off the staining. The roots stay alive in the surface, so it grows back within months. You end up paying again — or worse, paying to re-render a wall that a soft wash would have cleaned without harm.
Soft washing avoids all of it. Low pressure protects the surface, and the biocide kills the growth at the root so the clean lasts. It is gentler on the surface and longer-lasting — which is why it is the method the manufacturers point to.
What the render makers say
The major render manufacturers — names like K-Rend, Weber and Parex — all give the same advice in their care guidance: clean gently, keep the pressure low, and treat algae with a suitable biocide. A biocide soft wash is exactly that. They warn specifically against high-pressure washing, because it damages the finish.
We follow that guidance and go one step further by skipping the pressure washer altogether. If a quote sounds cheap because someone plans to "blast it clean", treat that as your warning sign.
Soft washing is only as good as the person doing it and the product they use. If you are deciding who to hire, this is how to choose a render cleaner — including the question about authorised biocides that almost nobody thinks to ask.
How a soft wash works
Soft washing means low pressure plus the correct cleaning solution that kills the staining at the root. The solution does the work, not brute force. Here is exactly how a soft wash runs, start to finish — the same careful method whatever render you have. You can read more on our full render cleaning process page.
Porosity assessment
We test how much water your render soaks up. Soft, thirsty render needs a gentler mix and a different dwell time. Reading a wall correctly is where 25 years on the tools earns its keep.
Soft wash application
We apply a biocide at the correct strength. A biocide is a cleaning solution that kills algae, lichen and mould. We spread it gently and evenly across the whole wall at low pressure.
Dwell time
We let the solution sit and do its job. This is the quiet step the cowboys skip because they are in a rush. Skipping it is why blasted walls grow back so fast.
Controlled low-pressure rinse
We rinse with low pressure water — think a strong garden hose, not a jet wash. The dead growth and dirt lift away cleanly, and the surface stays unharmed.
Aftercare guidance
We show you simple ways to keep the wall cleaner for longer. The biocide also keeps killing new spores for months after we leave, so the clean finish lasts far longer than a quick blast ever would.
Not sure which render you have? Send us a photo and we will tell you, then clean it the right way. We soft wash K-Rend, monocouche, painted and Weber render.
Meet Stephen Fudge
"I clean every wall myself. No subcontractors, no rushed crews. Just me, the right method, and 25 years of knowing how render behaves."
I started in exterior cleaning back in 2000. Before that I worked as a Local Authority Cleaning Inspector, so checking that a job was done to a proper standard was literally my job. That habit never left me. When I soft wash your render, I treat the wall the way the manufacturer says it should be treated, not the quick way.
In that time I have seen what a pressure washer does to soft render, and I have cleaned the same walls properly afterwards. That is why I will never blast your home. Here is what you get with me:
- Every job done by me, the owner — never passed to a subcontractor
- 25+ years of hands-on exterior cleaning across the Midlands
- Former Local Authority Cleaning Inspector
- Before-and-after photos taken on every single job
- £1 million public liability insurance, for your peace of mind
- An honest fixed price, given to you up front
Stephen FudgeFounder & lead operator, Midland Render Care · Read more about Stephen
Signs your render needs a soft wash
Not sure whether your walls are due a clean? After 25 years on Midlands render, these are the three signs worth acting on. Spot any of them and it is worth a free assessment — send a photo and we will tell you exactly what we are looking at.
Green, black or red patches
A green film, black blotches or rusty-red patches spreading across the render are all living growth — algae, lichen or surface mould feeding on the damp surface. It is not the render failing, but left alone it spreads a little further every wet season.
One side darker than the rest
If a single elevation looks far worse than the others, it is almost always the north-facing or shaded one. It stays damp longest, so growth takes hold there first — a clear sign the wall is holding moisture rather than drying between showers.
Staining that came back fast
If the green returned within months of a previous clean, the wall was almost certainly jet-washed — the top was knocked off but the living roots were left behind. A proper soft wash kills the growth at the root, which is exactly why the finish lasts years rather than weeks.
How much does soft washing cost?
We quote a fixed price up front. No hourly rates, no surprises on the day. The price depends on the size of the property, how easy the walls are to reach, how bad the staining is, and the render type. As a rough guide:
You get the full figure after a free assessment, with nothing hidden. For a full breakdown of what changes the price, see our render cleaning prices page.
Areas we cover for soft washing
We work within about 45 miles of our Swadlincote base (DE11). We soft wash render across the East and West Midlands, from new-build estates to older painted homes. We cover these towns and the villages around them:
The best time for a soft wash in the Midlands
The honest answer is that soft washing works in almost any season. The cleaning solution does the job, so we are not waiting on hot sun the way a pressure wash crew might be. That said, a few Midlands patterns are worth knowing.
Spring and early autumn are the sweet spots. The walls dry between showers, and you head into the next damp spell with a clean, treated surface. Many homeowners book in late summer so the render looks its best before the dark winter months.
Winter cleaning is fine too, as long as it is not freezing. In fact, that is when staining looks at its worst, so it is often when people first notice the problem. We work through the colder months across Derby, Burton and the surrounding villages. The one thing we avoid is treating a wall during a hard frost, since the solution needs liquid water to work and dwell properly. If the forecast turns, we simply rebook you. No fuss.
Soft washing, answered
What is soft washing?
Soft washing is a low-pressure cleaning method that uses a proper biocide to kill algae, lichen and mould at the root, then rinses gently. The cleaning solution does the work, not the pressure, so the surface is never blasted.
Is soft washing the right way to clean render?
Yes — it is the method the render manufacturers recommend. Because it is low pressure, it cannot strip the colour or drive water into the wall the way a jet wash does.
Does soft washing use bleach?
There is a real difference between someone decanting generic or pool-grade bleach into a sprayer and a cleaner using a product authorised for this work. We use an authorised biocide made for render, applied at the dilution stated on its label — not neat household or pool-grade bleach. Getting the product and dilution right is the core of doing the job properly.
How do you protect my plants and pets?
With method, not promises. We pre-wet the plants around the walls before we start, apply the solution at the correct strength rather than mixing it strong, and rinse everything down afterwards. We will ask you to keep pets indoors while we work and until the surfaces are dry.
How long does a soft wash last?
Far longer than a pressure wash. Because the growth is killed at the root rather than knocked off the top, most walls stay clean for a few years. North-facing and shaded walls may need a touch-up sooner.
Will soft washing damage my render?
No — that is the whole point of it. The low pressure protects the surface while the solution does the cleaning. The thing that damages render is high-pressure washing, which we never use.
Can soft washing be done in winter?
Yes, in almost any season, as long as it is not freezing. The solution needs liquid water to work, so we avoid hard frosts and simply rebook if the forecast turns.
Can you soft wash without ladders?
Yes. Soft washing is done from the ground using low-pressure equipment that reaches the full height of most homes. That keeps the job safe and means no ladders leaning against your walls.
More questions? Read our full render cleaning FAQs.
Not ready for a quote? Take the free guide
Stephen's plain-English guide to looking after render, drawn from 25 years on the tools. No jargon, no hard sell — just what helps your render and what harms it.
- Why render goes green, black and red — and what it really is
- The one mistake that ruins render, and how to dodge it
- A simple checklist to keep your walls clean for years
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Request a free soft wash assessment
Send us a couple of photos of your render and we will tell you the staining type, flag any problems, and give you an honest fixed price — usually within 24 hours. Prefer to talk? Call Stephen on 01283 293283.