Our professional render cleaning service tackles mould and stains using soft washing and steam cleaning which is safe for all render types. Over 1,000 happily satisfied customers across London, Surrey and the South-East.
At Prestige External Cleaning, we’ve been offering specialised render cleaning services for all modern and traditional render types, including acrylic, silicone, cement and monocouche (a single-coat render system) since 2010.
Although rendering provides an attractive appearance for the exterior of your building, it can be prone to staining, algae and mould due to its porous nature, and the effects of pollution in more built-up areas. Left uncleaned, the render allows moisture to penetrate, causing damp in internal walls and the building structure. This trapped moisture expands in freezing conditions, leading to cracks and potential repair work.
Our render cleaning service uses targeted low-pressure soft-washing and steam-cleaning techniques (unlike high-pressure washing which can damage render) to remove algae, mould and stains from the exterior surfaces of your building. This helps to enhance its appearance whilst ensuring no damage is caused to the render.
We’re experienced in working on buildings of all sizes, from residential properties to commercial buildings. Our specialist equipment includes access platforms, cherry pickers, rope access techniques, and telescopic poles. This allows us to reach awkward areas safely, so difficult access is never an issue.
Our dual-method cleaning process, using both soft washing and steam cleaning, is safe for all types of renders, even delicate monocouche and painted finishes that pressure washing would damage.
Whether your building is coated in algae, mould, dirt, or rust staining, our team uses targeted stain-removal treatments to tackle stubborn marks. We carry multiple cleaning solutions formulated for different stain types, so we can restore your render without resorting to repainting or replacement.
We're not afraid to get our hands dirty and where required we can brush stubborn residue the vacuum might not be able to suck up.
Our team has completed cleans on all types of buildings, from 2-storey homes to multi-storey apartment blocks and has cleaned rendering on many buildings across London and Surrey.
You'll get a fixed price quotation before we start work so you know exactly how much your job will cost in advance, even if we take longer than we estimate.
Our team are all health and safety accredited, and at Prestige External Cleaning we also hold PASMA, Safe Contractor and IPAF accreditation so you can rest assured you're using a trusted and reliable company for your render cleaning.
With over 1,000 Google reviews, we’ve built a reputation for reliable, high-quality render cleaning across London, Surrey and the South East.
Our team are PASMA, Safe Contractor and IPAF accredited – so you can trust your property is in safe hands.
Professional render cleaning for your home from our experienced team tackles mould and stains quickly. Find out more about our process and how we reach areas that ladders can’t.
We start by inspecting the render type and its texture, looking for issues such as algae, staining, pollution marks, also known as carbon staining, resulting in smoky black stains on the render’s surface, and cracks or damage.
This initial inspection is important as it helps us determine whether any stain-removal treatments will be needed to achieve the most effective clean. We also cover surrounding bushes and plants with protective sheeting to prevent any cleaning product residue from dripping onto them and turning them brown.
A pre-treatment solution is applied to help break down and loosen surface-level dirt, algae, and mould spores. This solution is left to work for the appropriate time based on contamination level, allowing it to soak into the surface build-up for a more effective clean, and it also helps prep the surface ready for low-pressure soft washing.
We apply a soft-wash chemical mix via a low-pressure system, targeting and gently removing stains and mould lodged in the surface without damaging the material. The primary cleaning agent is sodium hypochlorite (a bleach-based solution), diluted to an appropriate strength for the surface and level of contamination. This soft wash treatment is scientifically formulated to penetrate the surface, killing growths at the root, eliminating spores, and loosening dirt build-up.
For renders that are covered in thick layers of dirt or pollution, or where reduced chemical use is preferred, steam cleaning is also used at this stage. Steam cleaning uses a high-temperature, low-pressure technique that helps remove stains without causing damage.
We carry out final touch-ups where needed and inspect the exterior, ensuring it has been restored to its best possible appearance. We will also alert you to any damage you may not have been aware of, such as cracks, flaking paint, and loose render, that may require attention.
Render is delicate, and care must be taken when cleaning to avoid damage.
Steam cleaning alone may result in a streaky render; however, heavy moss or stains can be difficult to remove with soft washing.
The best results for render cleaning are achieved when the two techniques are combined for a deep and even finish.
Soft washing is our primary method for cleaning all types of renders, whether they are pebbled, smooth, or painted. It works by applying cleaning solutions and biocides to the surface with a water-fed pole and brush combination, breaking down organic growth. A low-pressure washer then targets stains, algae, and mould without damaging the delicate render surface.
As well as restoring the appearance of your render, the cleaning treatments used during the process help prevent future build-up of dirt, algae and moss, reducing the frequency of cleaning needed.
Steam cleaning uses a high-temperature, low-pressure approach to direct hot steam onto the render’s surface to loosen and remove dirt build-up. It uses less water than soft washing, and its optimal temperature of around 150°C kills any surface-based mould spores, helping to prevent regrowth.
Pressure washing uses high-pressure water to blast dirt, algae and mould from surfaces. It is commonly used for tougher surfaces, such as patio cleaning or driveway cleaning.
Although other companies may recommend pressure washing because it can sometimes achieve results faster, we will only ever use soft washing and steam cleaning methods for render, as the high pressure generated by a pressure washer can damage the surface, resulting in erosion and marking.
Render is porous and can absorb and retain moisture from rain and humidity, creating damp conditions that are ideal for algae, mould, and moss. The textured surface of render keeps the material damper for longer, allowing algae and moss to grow and spread faster.
Walls receiving less direct sunlight stay damp for longer. The result may not only look unsightly and make your building look unkept but can also damage the render as water penetrates the surface, leading to deterioration, cracking or loosening. This problem worsens in winter, as the trapped moisture can freeze and expand, creating larger cracks.
Dirt and dust can accumulate, particularly noticeable on lighter-coloured renders and in areas exposed to vehicle exhaust or industrial emissions. Left untreated, it can permanently discolour the surface.
Air pollution, also known as carbon staining, is unavoidable in built-up areas. Over time this can result in smoky black marks on the render surface.
Rust stains are caused by metal fixtures, guttering, or railings reacting with rainwater, resulting in vibrant orange or red streaks appearing across the surface of your render.
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Everything you need to know before booking your exterior clean.
Yes, we clean all major render brands, including K-Rend, Parex and Weber. Our low-pressure soft washing and steam cleaning methods are safe for all modern and traditional render types, including acrylic, silicone, cement and monocouche finishes.
Prices range depending on the property or building size, render condition and access requirements. We provide fixed-price quotations before starting work, and the price won’t change even if the job takes longer than estimated.
No, our render cleaning methods will not damage your walls. We use only low-pressure soft washing and steam cleaning techniques, which are specifically designed to be safe for delicate render surfaces. We never use high-pressure washing, which can cause erosion, marking and surface damage to render.
Yes, we provide render cleaning services for commercial properties of all sizes, from small office buildings to multi-storey apartment blocks. We’ve completed commercial render cleaning projects on many buildings across London and Surrey, using specialist access equipment and low-pressure cleaning methods safe for all render types.
