Mr Softwash®

Softwash Driveway Cleaning

Softwash Long Term Protection for 3-5 Years

Soft washing with biocides provide long-term protection by

killing organic organisms—such as algae, moss, fungi, and lichen—at their root and leaving a residual film that prevents regrowth. 

How Biocide Protection Works

• Residual Action: Unlike bleach (sodium hypochlorite), which provides an instant clean but no lasting protection, biocides like DDAC (Didecyldimethylammonium chloride)penetrate porous surfaces. They continue to kill spores that land on the surface for months or even years after application.
• Self-Cleansing Process: Many professional biocides are "spray and leave" products. They work with natural weathering (rain and wind) to break down and wash away dead organic matter over several weeks or months.
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Is Soft washing with biocide 

the best method for cleaning render?

Yes, bleach can damage driveways if used incorrectly, primarily through discolouration and surface degradation. While sodium hypochlorite (the active ingredient in bleach) is a standard professional tool for "soft washing,"  bleach is often too strong or if used at improper dilutions for delicate surfaces like driveways. 

How Bleach Can Damage Driveways

• Permanent Discolouration: Using bleach straight from the bottle or in high concentrations can cause patchy, white, or streaked finishes due to a pH imbalance.
• Surface Etching: As a corrosive alkaline solution, concentrated bleach can break down the surface chemistry, stripping away the water-repellent silicone layer that protects modern renders.
• Salt Residue: If not thoroughly rinsed, bleach leaves behind salt deposits (efflorescence). These salts attract moisture, which can actually encourage faster regrowth of algae and moss.
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Steam cleaning Driveways

Steam cleaning ( Doff/Torc ) render is highly effective for removing heavy carbon staining or paint, but lacks the long term residual protection against algae that biocides provide.

soft washing with a biocide is widely considered the best and safest method for cleaning Driveways.

Softwashing is

a gentle, low-pressure cleaning method for driveways that uses specialized chemical solutions to remove algae, moss, and other organic growth. Unlike high-pressure jet washing, softwashing sanitizes the surface, killing growth at its roots for a more thorough and longer-lasting clean. 

How softwashing works

The process involves a few key steps performed by a trained operator: 

1. Prepare the area: The cleaner removes debris from the driveway and protects nearby plants and landscaping by pre-wetting them with water.
2. Apply cleaning solution: A biodegradable cleaning solution, typically a mix of sodium hypochlorite, a surfactant, and water, is applied to the surface with a low-pressure sprayer, often similar to a garden hose. The surfactant helps the solution cling to the surface and penetrate grime.
3. Allow dwell time: The solution is left to sit on the surface for 10 to 20 minutes to break down organic contaminants like mould, mildew, and algae.
4. Rinse gently: The driveway is thoroughly rinsed with low-pressure water to wash away the dissolved grime.
5. Apply post-treatment (optional): A biocide can be applied to prevent future organic growth, with results potentially lasting for 3–5 years. 

Softwashing vs. pressure washing

Feature 

Softwashing

Pressure Washing

Cleaning method

Relies on biodegradable chemicals to kill and break down organic matter.

Relies on the brute force of high-pressure water to blast away dirt.

Pressure used

Very low pressure (under 500 PSI), about the strength of a garden hose.

High pressure (1,500–4,000+ PSI).

Best for

Delicate or porous surfaces like tarmac, resin, or older block paving where mortar joints could be damaged. Also highly effective against organic growth.

Durable, hard surfaces like new concrete or very stubborn stains like oil and heavy grease.

Longevity

Longer-lasting results because it kills organic growth at its source, preventing it from returning quickly.

Shorter-term results, as it often only cleans the surface, allowing moss and algae to regrow faster.

Safety and risk

Very low risk of surface damage. Safer for plants and the surrounding environment when handled properly.

Higher risk of damaging delicate surfaces, such as eroding mortar joints in paving or chipping paint.

Driveway materials suitable for softwashing

Softwashing is particularly useful for driveways made from:

• Tarmac: The low pressure prevents damage to this softer surface.
• Resin-bound surfaces: Softwashing avoids loosening the resin.
• Block paving: It cleans the blocks without blowing out the mortar or sand between the joints.
• Concrete: Softwashing can be used on older concrete to kill algae and mildew gently.

Soft washing a driveway

uses low-pressure water combined with specialized cleaning solutions to safely remove organic growth and stains without damaging the surface. This method is gentler than high-pressure washing, which can erode surfaces like concrete and ruin block paving joints. 

How soft washing works

1. Preparation: Clear the driveway of all debris, furniture, and obstacles.
2. Chemical application: Apply the soft wash solution using a pump sprayer or low-pressure equipment. A typical solution combines sodium hypochlorite (bleach) with a surfactant (such as dish soap) and water.
3. Dwell time: Allow the solution to sit for 10 to 20 minutes to break down and kill organic material like algae, moss, and lichen.
4. Rinsing: Use a garden hose with low pressure to rinse the surface thoroughly, washing away the dead organic matter and chemicals.