Southard Cleaning Solutions · Newport & South Wales
Render Cleaning & Soft Washing in Newport & South Wales.
Green algae, black spot and lichen make render look tired years before its time. We remove it safely with low-pressure soft washing, the right method for K-Rend, painted render and pebbledash. No blasting, no damage.
Why It Matters
Stained Render Is More Than A Cosmetic Problem.
Render is porous. Once algae and black spot take hold they hold moisture against the wall, and in the South Wales climate they never get the chance to dry out.
Algae & Black Spot
Green and red algae spread across shaded and west-facing elevations, while black spot lichen roots into the render surface itself.
Trapped Damp
Organic growth holds water against the wall, keeping render saturated and raising the risk of damp tracking through to internal walls.
Coating Failure
On painted render, growth lifts and blisters the coating. Left long enough, the fix becomes a repaint rather than a clean.
Kerb Appeal & Value
Render covers more of your home than any other surface. Staining ages the whole property, and buyers and valuers notice it first.
The Right Method
Soft Washing. The Safe Way To Clean Render.
What is soft washing?
Soft washing cleans render using low-pressure water combined with professional biocide solutions. Instead of blasting growth off the surface, the treatment kills algae, lichen and black spot at the root, then rinses away gently. The render is cleaned without being eroded.
Why not just jet wash render?
High-pressure jetting forces water into the render, strips the weatherproof face from thin-coat systems and can crack or pit older sand and cement finishes. It also leaves algae roots behind, so the staining returns within months.
We match the method to the surface. Pressure washing is the right tool for driveways and hard landscaping, and we use it there. On render, soft washing is the professional standard, the same low-pressure approach behind our roof cleaning service.
Is it safe for K-Rend and coloured render?
Yes. Soft washing is the method K-Rend and other silicone render manufacturers recommend, because it cleans without damaging the tinted surface or voiding the system warranty. We treat coloured, monocouche and painted render week in, week out across South Wales.
Can I protect the render afterwards?
Yes. As Smartseal Approved Applicators we can apply a Smartseal render sealant after your clean. It adds an invisible hydrophobic layer that keeps the wall drier, so algae takes far longer to re-establish. We quote it alongside your clean if you want the option.
How It Works
Five Steps. No Surprises.
Quote
Send photos or book a visit. You get a clear fixed price, same day wherever possible.
Book
Pick a date that suits. We confirm in writing and turn up when we say we will.
Protect & Set Up
Plants, windows, doors and surfaces below the work are protected before anything is applied.
Soft Wash Clean
Professional biocide treatment applied at low pressure, dwell time respected, then rinsed clean.
Walk-Round & Aftercare
We walk the job with you, tidy fully and explain how the treatment keeps working after we leave.
The Difference
Real Jobs. Real Results.
Guide Pricing
What Does Render Cleaning Cost?
Most full house cleans land between £400 and £600 depending on size, render type, soiling and access. Every quote includes the professional biocide treatment as standard. We are not VAT registered, so the price we quote is the price you pay. Your fixed quote is free, with no obligation, and returned the same day wherever possible.
Free Quote
Send A Few Photos. Get A Price Today.
A couple of photos of your render from the pavement is usually all we need. No site visit required for most quotes. Email your photos with your postcode and phone number, or call and we will talk it through.
We reply the same day wherever possible. Your details are only used to provide your quote. You can also reach us through our contact page.
Local Knowledge
Why South Wales Render Goes Green.
South Wales is one of the wettest parts of the UK, and render here never gets a long dry spell to recover. Persistent rainfall, mild winters and humid summers give algae exactly what it needs, which is why a rendered wall in Newport or Cwmbran can turn green within two or three years of being cleaned or painted, while the same wall in a drier county might stay clean for five or more.
The local housing stock makes it more visible still. Estates across Newport, Cwmbran, Pontypool and the valleys are dominated by painted sand and cement render, pebbledash and, on newer developments, coloured thin-coat systems like K-Rend. Each of these surfaces holds moisture differently. Pebbledash traps water in its texture, painted render shows every streak of green against a pale background, and coloured render stains unevenly around windows, sills and shaded elevations. North and west-facing walls, which take the prevailing weather off the Bristol Channel, are almost always the worst affected.
Because each surface behaves differently, each one needs a matched approach. The biocide strength, dwell time and rinse pressure we use on a 1930s pebbledashed semi in Caerleon is not what we use on a K-Rend new build in Magor. That is the difference between a clean that lasts and a clean that comes back within a season, and it is why we survey every property rather than pricing blind.
What Customers Say
Rated 5.0 On Google.
Used Gareth on a number of occasions, nothing is ever too much trouble. Professional and fantastic at what he does. Highly recommend.
Southard Cleaning is 100% reliable, Gareth is polite and friendly and I’m happy to recommend him, he does a great job!
Friendly professional and always does a very good job.
Areas We Cover
Render Cleaning Across South Wales.
Based in Cwmbran, covering homeowners across the NP postcodes and beyond. If your town is not listed, get in touch, we travel further for larger projects.
Commercial & Trade
Schools, Offices & Managed Properties.
Commercial render cleaning across South Wales and the M4 corridor is handled by Southard Exterior Contractors, the B2B arm of Southard Group. Site-specific RAMS and photo reporting come as standard, with white-label delivery available for FM providers and managing agents.
Good To Know
Render Cleaning Questions, Answered.
How much does render cleaning cost in the UK?
Cost depends on the size of the property, the render type and how established the growth is. As a guide, our soft washing starts from £6 per m², a single elevation from £150, and a full clean on a typical three-bed semi from £350, with most landing between £400 and £600. Your fixed quote is free and returned the same day wherever possible.
Is soft washing safe for K-Rend?
Yes. Low-pressure soft washing is the method silicone render manufacturers recommend. It cleans the surface and kills growth at the root without damaging the tinted finish or affecting the system warranty.
How long does a soft wash last?
Because the biocide treatment kills growth at the root rather than just removing what you can see, most render stays clean for several years. Shaded and tree-lined properties regrow faster, and an optional Smartseal render sealant can extend the result further by keeping the wall drier. We will give you an honest picture for your walls at the survey.
Can you clean painted render and pebbledash?
Yes. Painted render and pebbledash both respond well to soft washing. The texture of pebbledash makes jet washing particularly risky, so a low-pressure biocide clean is the right approach.
Will the treatment harm my plants or pets?
We protect planting before we start, rinse thoroughly and use professional products responsibly under our LANTRA training. We will talk through anything specific to your garden at the survey.
Do I need to do anything before you arrive?
Just clear access around the walls being treated if you can. We bring everything else, protect the surrounding areas and tidy fully before we leave.
Do you clean render on commercial buildings?
Yes, through Southard Exterior Contractors, our B2B arm. Schools, offices and managed properties are covered with RAMS and photo reports as standard.
Free Quotations · Fully Insured · Same-Day Quotes
Ready To Get Your Render Back To Its Best?
01633 444 800or email info@southardcleaningsolutions.co.uk
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