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Roughcast, often referred to as harling, is a popular exterior wall finish used on homes and commercial buildings throughout the UK. It is known for its durability and ability to withstand harsh weather conditions. However, due to the UK’s damp climate, roughcast surfaces can quickly become covered in algae, moss, lichen, and atmospheric pollution.
Over time this organic growth causes unsightly staining, making properties look tired and poorly maintained.
Our roughcast soft wash cleaning service in the UK provides a safe, effective, and long-lasting solution to remove these contaminants and restore the original appearance of your exterior walls.
Using specialist soft washing techniques, we clean roughcast surfaces without the risk of damage caused by high-pressure jet washing.

Soft washing is a professional exterior cleaning method designed for delicate surfaces such as render, roughcast, pebble dash, and stone. Instead of relying on high pressure, soft washing uses specially formulated cleaning solutions applied at low pressure to break down organic growth and dirt.
This approach allows contaminants to be removed safely while protecting the structural integrity of the roughcast.
Soft washing effectively removes:
Because the treatment eliminates spores at their source, it also helps slow down the return of algae and biological growth.
Soft washing removes unsightly staining and restores the natural colour of your roughcast walls, dramatically improving the look of your home or building.
Unlike pressure washing alone, soft washing uses specialised treatments that continue to work after cleaning to slow the regrowth of algae and moss.
Removing organic growth helps prevent moisture retention that can gradually weaken and deteriorate roughcast surfaces.
Clean exterior walls enhance the overall appearance of your property, making it more attractive to visitors, neighbours, or potential buyers.
Regular roughcast cleaning can reduce the need for expensive repainting, repairs, or render replacement in the future.

























We inspect the roughcast surface to identify areas affected by heavy algae, moss, or staining and determine the most suitable cleaning approach.
Loose debris, moss, and surface contaminants are carefully removed prior to treatment.
Specialist cleaning solutions are applied using low-pressure equipment to break down organic growth and dirt embedded in the render.
The surface is carefully rinsed to remove contaminants while protecting the integrity of the roughcast.
A professional biocide treatment is applied to help prevent the rapid return of algae and biological growth.
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Olga Tucka108 days agoTrustindex verifies that the original source of the review is Google.
Best in the area! Fantastic communication and service, and the quote matched the final price; on time and were incredibly kind and polite. Highly recommend!Posted on Google![]()
Mangao Ruxi184 days agoTrustindex verifies that the original source of the review is Google.
We’ve used this service a few times over the years for our house exterior, gutters, and patio, and they always do a great job. They’re reliable, thorough, and often go the extra mile, even with tough stains. Everything is left looking really clean, and they always explain things clearly. We’re very happy with the results and keep coming back.Posted on Google![]()
Gemma O'Brien231 days agoTrustindex verifies that the original source of the review is Google.
Softwashing UK was able to meet our gutter cleaning needs where others couldn’t. They were professional, reliable, and clearly knew what they were doing. They also did a fantastic job cleaning the render on our garage — it looks so much better now! Great service overall and I would definitely recommend them to others.Posted on Google![]()
Joseph Kelly283 days agoTrustindex verifies that the original source of the review is Google.
Couldn't recommend highly enough. Super efficient and very reasonably priced. I'd definitely use them again+1Posted on Google![]()
John406 days agoTrustindex verifies that the original source of the review is Google.
Many thanks to Softwashing UK for their excellent work at a reasonable price. We had some long standing algae stains on the rendering of the rear walls on our property in Cardiff. And the admin team were great in providing a quote, planning the work, and visited our property beforehand to check access to complete the work. Excellent team who know what they are doing. We are really happy with the results, better than we expected. Thanks.+6Posted on Google![]()
Rich Fogg424 days agoTrustindex verifies that the original source of the review is Google.
Excellent service from start to finish. From initial phone calls with Bernie and Gavin explaining what would be required to clean our residential property to the job being completed exactly as described. Would highly recommend as they have achieved amazing results, very professional. Photos attached: Afterwards photos taken not long after completion so still drying out, the before photos were taken the 24 hours before before.+3Posted on Google![]()
Sally507 days agoTrustindex verifies that the original source of the review is Google.
Gavin and the Team at Softwash provided a professional and personal service in cleaning our render - no fuss, no mess. It was brilliant. We cannot recommend them highly enough. Thank you. S & APosted on Google![]()
Lynnette Thomas550 days agoTrustindex verifies that the original source of the review is Google.
A fantastic result! Can’t fault the service and highly recommend. Thank you very much!Posted on Google![]()
Paul Welsh559 days agoTrustindex verifies that the original source of the review is Google.
We’ve used Softwashing a number of times over the past few years to clean the exterior of our house, gutters and patio. Every time it has been a fantastic service, always going above and beyond, whether it’s attacking a stubborn rust stain or taking time to explain the process. We have recommended them to friends and neighbours and using them every year is testament to how happy we are with the work they do. Thanks!Posted on Google![]()
Andrew Covell570 days agoTrustindex verifies that the original source of the review is Google.
The service was great, Gavin arrived on the dot of eight o’clock and he then talked me through the process before starting. He worked diligently using a range of different techniques to address the various issues. At the end the render looked like new! Would definitely recommend and will have them back again when it needs doing again!
At Softwashing UK, we provide comprehensive residential exterior cleaning services, from expert render cleaning to roof, driveway, patio, and brick cleaning.
Using eco-friendly soft wash methods, we safely remove dirt, algae, and moss, restoring surfaces without damage. Trusted nationwide, we deliver outstanding results that protect your home’s exterior.
At Softwashing UK, we offer professional commercial exterior cleaning services tailored to businesses of all sizes.
From render and roof cleaning to cladding, signage, and pathways, we use safe, low-pressure soft wash systems to maintain your property’s appearance. Our reliable service ensures a clean, welcoming environment for staff and visitors.





















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