

Softwashing is a modern cleaning technique that has revolutionised the way we approach exterior cleaning for various surfaces. Unlike traditional pressure washing, which relies on high-pressure water to remove dirt and grime, softwashing utilises low-pressure water combined with specialised cleaning solutions. This method effectively removes organic growths like algae, lichen, and mould, as well as environmental pollutants, without damaging the underlying surface. Softwashing is particularly advantageous for cleaning delicate surfaces such as roofs, render, decks, and more, making it a versatile solution for both residential and commercial properties.
Softwashing is critical for maintaining the appearance and longevity of exterior surfaces. Over time, surfaces accumulate dirt, biological growths, and pollutants that not only make them look unattractive but can also cause deterioration. For example, algae and mould can retain moisture, leading to wood rot and other structural issues. Softwashing not only cleans these contaminants but also addresses the root cause by killing the spores and preventing regrowth. This makes it a highly effective and preventive maintenance approach.
Understanding the differences between softwashing and pressure washing is essential for selecting the appropriate method for cleaning various surfaces.
Pressure washing involves the use of high-pressure water to remove dirt, grime, mould, and other contaminants from surfaces. This method is effective for cleaning hard, durable surfaces such as concrete driveways, brick walls, and metal structures. The high-pressure water can quickly blast away even the most stubborn stains.
However, this aggressive approach can also cause significant damage to more delicate surfaces, such as wood, render, and painted exteriors. The intense pressure can erode, chip, or crack these materials, leading to costly repairs and shortened lifespans.
Softwashing, in contrast, uses low-pressure water combined with specially formulated cleaning solutions to achieve deep cleaning without the risk of damage. The chemicals used in softwashing are designed to break down and remove biological growths and environmental pollutants gently and effectively.
This method is particularly beneficial for cleaning delicate stones, timber, render, and other exterior surfaces where preserving the material’s integrity is crucial. Softwashing is not only safer for the surfaces being cleaned but also provides longer-lasting results by addressing the root causes of contamination.
The effectiveness of the softwashing process largely depends on the quality and formulation of the chemicals used. Common chemicals in softwashing include:
Sodium Hypochlorite (Bleach): Sodium hypochlorite is a powerful disinfectant and bleaching agent. In softwashing, it is typically diluted with water to create a solution that will effectively clean surfaces. When using our Sodium Hypochlorite based products, it is important that you lightly clean the surface first. This will enable you to use a lower dilution ratio and get a deeper clean. It also reduces the amount of chemical used. For stubborn staining, it may be necessary to treat the surface first with one of our HSE licensed biocides. Surfactants: Surfactants are compounds that reduce the surface tension of water, allowing the cleaning solution to spread more easily and penetrate into porous surfaces. They help certain chemical solutions adhere to surfaces, ensuring thorough coverage and effective cleaning. Our PureSurf Boost is a surfactant with added scent mask to hide the chlorine smell of the bleach if added to Sodium Hypochlorite.
HSE Licensed Biocides: These chemicals are specifically formulated to target fungi, algae, and other unwanted organisms. They are often included in softwashing solutions to enhance the effectiveness of the cleaning process and provide long-lasting protection against regrowth. It is important to remember that you can not use a biocide to kill moss. This applies to all cleaning processes, not just softwashing. Any moss on the surface will need to be removed mechanically, either with a scraper or a pressure washer prior to applying a biocide.
Softwashing offers several benefits over traditional pressure washing, making it the preferred method for many exterior cleaning tasks. It is a gentle process as the low-pressure application and specialised chemicals ensure that surfaces are cleaned without the risk of damage.
It is very effective as softwashing effectively removes a wide range of contaminants, including biological growths and environmental pollutants. The use of softwashing chemicals ensures deep cleaning and long-lasting results.
By avoiding the high pressures used in traditional washing methods, softwashing prevents erosion, chipping, and cracking of delicate materials. This helps maintain the structural integrity and aesthetic appeal of various surfaces.
PureSeal Services committed to providing the highest quality softwashing products. Our expertise in chemicals ensures that your customers valuable structures are cleaned with the utmost care and precision. Feel free to browse our shop to learn more about our specialised softwashing chemicals.
In the Softwashing and external cleaning industry, daily exposure to potent chemicals like sodium hypochlorite and biocides presents an invisible yet serious health threat. These chemicals, while effective for cleaning and disinfecting, release harmful fumes and droplets that can linger in the air and settle on surfaces. Breathing in these toxic vapours over time can lead to severe respiratory conditions, ranging from chronic bronchitis to irreversible lung damage. Additionally, any accidental splashes of sodium hypochlorite or biocides can cause eye irritation or even long-term vision impairment. Without the right protective equipment, such as respirators, safety goggles, gloves, and chemical-resistant clothing, these risks become a regular part of your work environment, slowly impacting your health with each exposure.
Consider the cumulative effects:
every time you skip PPE, you’re allowing harmful chemicals to attack your body, compromising your well-being little by little. The consequences may not be immediate, but the damage is insidious and often irreversible. Don’t let preventable health issues become the cost of your job. By investing in proper PPE, you’re not just following best practices – you’re making a choice to protect your health, now and for years to come. Prioritise safety on every job; your future self will thank you.
PureSeal are proud to be a BSIF (British Safety Industry Federation) Registered Safety Supplier, a mark of quality and trust in the safety industry. Buying from a BSIF Registered Safety Supplier is essential because it ensures that products meet rigorous safety standards, are fully compliant with relevant regulations, and are of genuine quality. This registration helps businesses and individuals make informed choices, protecting their workers with products that are certified, reliable, and built to perform safely in demanding environments.
PureSeal are dedicated to offering professional-grade softwashing chemicals designed to deliver exceptional cleaning performance while meeting quality standards. Softwashing chemicals, when used correctly, are highly effective for treating and removing mould, algae, and other contaminants from exterior surfaces. However, due to the potent nature of these chemicals, the Health and Safety Executive (HSE) mandates that any professional using them must undergo appropriate training. This training requirement is in place to ensure that professionals are aware of the potential hazards and necessary precautions.
Using these chemicals safely requires knowledge of proper handling, application, dilution, and disposal methods to prevent harm to both the user and the environment. Trained professionals are better equipped to manage risks, avoid unintended chemical reactions, and reduce potential hazards to the surrounding area. This is why we have created the professional user of biocides online training course. Train from the comfort of your own home at your own pace. This course is City & Guilds Assured, and you will receive a City & Guilds issued digital credential and certificate upon completion and have the opportunity to register your business on the professional user of biocides register. Investing in proper training not only enhances product knowledge and effectiveness but also supports a safer work environment, reduces liability, and ensures compliance with HSE regulations for peace of mind and professionalism.
For further information, click the following link: www.biocidetraining.co.uk
Softwashing is a cleaning method that uses low-pressure water combined with specialised cleaning chemicals to gently remove dirt, lichen, mould, algae, and other contaminants from surfaces. It’s particularly effective on surfaces such as roofs, patios, driveways, render and timber.
Softwashing chemicals are specially formulated cleaning chemicals designed to break down and remove stains, mould, mildew, algae, and other organic contaminants from surfaces. These chemicals are typically biocides or oxidisers.
No, softwashing chemicals are hazardous to the environment and the end user. This is why it is extremely important to follow the instructions on the label and familiarise yourself with the chemicals safety data sheet. Personal protective equipment should be worn at all stages of using the chemical.
Softwashing chemicals are suitable for virtually all surfaces, however, using the wrong chemical on an incompatible surface can cause permanent damage. This is why surface identification is key.
Softwashing chemicals work in different ways. Biocides puncture cell walls which cause cells to leak, this then leads to cell death. Oxidisers rapidly oxidise cells by introducing chemical compounds like chlorine.
When used properly, softwashing chemicals should not harm plants or landscaping. However, it’s important to follow proper application techniques and rinse thoroughly to minimise any potential impact. In some cases, covering delicate plants or watering them before and after cleaning may provide additional protection.
The effectiveness of softwashing chemicals can vary depending on the type and severity of the stains or contaminants being treated. In most cases, you may start to see results within minutes to hours after application. However, for heavily soiled or deeply embedded stains, multiple treatments may be necessary. Biocides have the longest cleaning cycle and can take 6 months upwards to self cleanse a surface.
When using softwashing chemicals, it’s important to wear appropriate protective gear, such as gloves and eye protection, to avoid skin or eye irritation. Additionally, follow the manufacturer’s instructions carefully, and avoid mixing chemicals unless specified. COSHH assessment of the chemicals you use in the UK are a legal requirement and can be compiled using the chemicals safety data sheet.
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