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How to Soft Wash Your Patio: Safe Algae & Lichen Removal Guide

By Mark Cave June 13, 2026

The Comprehensive Guide to Soft Washing Your Patio

Maintaining your patio's pristine condition can seem like a daunting task, especially when faced with stubborn dirt, algae, and lichen build-up. However, there's a gentle yet highly effective method available: soft washing. Designed for both professionals and DIY enthusiasts, soft washing is a cleaning technique that safely and effectively restores your patio's original charm without causing damage. Let's explore how to soft wash your patio efficiently.

Understanding Soft Washing

Soft washing is a cleaning method that employs low-pressure water and specialised cleaning solutions to eliminate biological growths, dirt, and stains from exterior surfaces. Unlike high-pressure washing, which can cause significant surface damage, soft washing uses eco-friendly chemicals that penetrate and remove contaminants without harming the underlying materials.

Why Choose Soft Washing for Patios?

Patios are often crafted from delicate materials like natural stone or intricate pavers, which can chip or erode under high-pressure washing. Soft washing respects the integrity of these surfaces, ensuring thorough cleaning while maintaining aesthetic appeal. Besides, it provides long-lasting results, as the biocide continues to work even after the wash, prolonging cleanliness.

Essential Equipment and Chemicals

For effective soft washing, the right equipment and chemicals are crucial. Here’s a list of essentials you may need:

  • Soft wash chemicals: A good quality biocide is essential to effectively remove and inhibit the growth of algae and lichens. Consider Soft Wash Pro 50 DDAC for its professional-grade efficacy.
  • Clever Wash Surfactant: This surfactant helps the chemicals adhere better to vertical surfaces and increases penetration.
  • Clever Injector Dosatron: This tool ensures precise chemical mixing, making your cleaning solution effective while reducing chemical waste.

Step-by-Step Soft Washing Process

  1. Preparation: Initially, clear the patio of any furniture, potted plants, and debris. Wet the surrounding vegetation to protect it from accidental chemical spraying.
  2. Mix the Solution: Use the Dosatron Injector for an accurate mix of your biocide and surfactant with water as per instructions.
  3. Application: Apply the solution gently over the patio using low pressure. Ensure even coverage and let the solution dwell for the recommended duration to break down contaminants effectively.
  4. Rinse: Using a garden hose or low-pressure washer setting, rinse the patio thoroughly. This step removes any residues and dead organic matter.

Safety and Best Practices

When conducting soft washing operations, safety is paramount. Wear protective gear, such as gloves and eye protection, to prevent contact with chemicals. Always adhere to manufacturer guidelines for mixing and exposure times. Exercise caution when wet surfaces become slippery, and keep pets and children away from treated areas until fully rinsed and dried.

Soft Washing FAQs

Question Answer
How often should I soft wash my patio? Ideally, patios should be soft washed annually, although heavily shaded or north-facing areas may require more frequent attention due to increased moisture.
Can I soft wash in any weather? Soft washing is best performed during dry conditions with moderate temperatures to ensure effective chemical action and drying.

Conclusion

Soft washing is an excellent choice for maintaining the beauty and longevity of your patio. This gentle method ensures thorough cleaning while safeguarding against surface damage. By opting for soft washing, homeowners and professionals alike can enjoy pristine outdoor spaces with minimal effort and maximum effect.

For those looking to invest in the best equipment, chemicals, and training courses to refine their skills, look no further than SoftWash UK. Equip yourself with the knowledge and tools necessary for success in soft washing today!


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Soft Wash Calculator App

Now you can say I've got an app for that!

    

Available NOW Click Here To Download

Softwashing calculator is an indispensable tool for juggling complicated chemical mixes. It helps reduce wastage and keeps operating costs down by giving accurate proportions

If you are having difficulty getting your head around the maths, trying to work out what percentage of softwash you need, how much chemical, surfactant and water to add, then this is the App for you.

 

 


The Soft Wash Calculator App allows you to work out your soft wash recipe by telling you exactly how much chemical, how much water and how much surfactant to add to get the desired soft wash recipe.
It doesn't stop there!.
- It can also remix your leftover softwash to a new stronger or weaker recipe.
- all controls in one place for see at a glance operation
- ease of input via pre-loaded dials. no more calculator style typing
- instantly responds to changes of complex combinations
- works in both Litres and US Gallons
- tested for Protan and Deutan colourblind users
- links to SoftwashingUK website

Take this scenario
You started with a 1% soft wash recipe of 50 gal (or litres)  for a deck clean and you’re left with 13 gallons.

You get a call from a prospective customer to clean their roof. Past experience tells you a 4% soft wash recipe is needed, but what about your leftover mix at 1%?.

Do you waste time and effort driving back to base to transfer into a standby tank?
You could consider the 13 gal as just water, top up the tank and start again.  
But that’s throwing away the value of the mix and raising your overhead.

Soft Wash Calculator App to the rescue.

You get to the new job and it requires 100 gal / litres.
Switch into remix mode , confirming the 13 gal already in the tank
Move the dials to your new recipe and the app immediately updates the different amounts to add in front of your eyes including the correct amount of extra surfactant.

You now have a 100 gal / litres tank of 4% soft wash recipe ready for your roof clean job!

Not forgetting you’ve saved money too, all without stress and uncertainty . Don’t underestimate what confident calmness has on your customer putting out referrals.

The same applies if you have a 4% recipe left in your tank and you need to dilute it down to 2%. Again the app will tell you how.

Softwashing calculator will also work for any chemical recipe. For instance you can use it for Sodium Hypochlorite, Bleach, Biocide , TFR traffic film remover and degreaser. Even the mathematically-challenged rocket scientist can top up their booster tanks to new fuel mixes after launch delays caused by changing weather conditions.

Using this app you will know exactly what chemical strength to put on any surface giving you the confidence and the knowledge of a professional soft washer and you’ll save money as well.

So if you have little knowledge of how to mix a soft wash recipe then this app is for you.
If you have little knowledge of how to remix a soft wash recipe then this app is for you.
If you want to save money when mixing a soft wash recipe then this app is for you.

This app is also backward compatible to devices running iOS7. We've done this so you can re-purpose an old iPhone 4 or iPod Touch 5  for what could be hazardous work environments. Just toss one in your cleaning van's toolkit.

Once you learn the methods and procedures of how to apply the soft wash to the different surfaces that need cleaning you’ll be unstoppable!

The app also has  a guide to what percentage for what surface. And if you are the lucky owner of a Clever Injector it will remind you the correct setting for the job.
However you should always consider and risk assess what soft wash recipe you need to clean the surface.

** A major iOS code-base change may require a re-purchase. The appiverse at the time will confirm our promise that we won't do so unless the necessity is apparent.



 

 

Available NOW