Soft Wash Roof Cleaning: What It Is and When to Use It
If you’ve noticed dark streaks, moss, or lichen on your roof, you’re not alone. UK homes, especially in damp climates, are prone to organic growth that not only looks unattractive but can also shorten the lifespan of your roof. One of the safest and most effective solutions is soft wash roof cleaning.
In this blog, we’ll explain exactly what soft washing is, how it works, when to use it, and why it’s the best choice for maintaining a healthy, long-lasting roof.
What Is Soft Wash Roof Cleaning?
Soft wash roof cleaning is a gentle cleaning method that uses low-pressure water combined with specialised cleaning solutions to remove moss, algae, lichen, and mildew. Instead of blasting the dirt away, the soft wash system allows the solution to soak into the roof surface, breaking down growth at the root.
This method is ideal for roofing materials such as:
- Asphalt shingles
- Clay tiles
- Slate
- Concrete tiles
Because the process relies on detergents and biocides rather than high water pressure, it avoids damage to delicate surfaces while delivering a thorough clean.
How Does Soft Wash Roof Cleaning Work?
The process is simple but highly effective:
- Application of Cleaning Solution – A roof-safe solution is sprayed evenly across the surface.
- Breakdown of Growth – The solution works to kill moss, algae, and spores at the source.
- Gentle Rinse or Rainfall – The roof is rinsed with low-pressure water, or in some cases, rainfall naturally washes away the loosened debris.
Unlike harsh scrubbing or pressure washing, soft washing treats the problem at the root, meaning growth is less likely to come back quickly.
Why Choose Soft Washing Over Other Methods?
The main advantage of soft washing is its safety and long-lasting effectiveness. Roofs are vulnerable to damage, and using high pressure can strip protective layers, crack tiles, or even void manufacturer warranties. Soft washing eliminates this risk.
Key benefits include:
- Protects Your Roof – No risk of dislodging tiles or stripping shingles.
- Kills Growth at the Root – Prevents moss and algae from returning quickly.
- Improves Curb Appeal – Restores your roof’s clean, fresh appearance.
- Extends Roof Lifespan – By removing harmful growth, you protect your roof materials from decay.
- Eco-Friendly Options – Many soft wash solutions are biodegradable and safe for surrounding plants.
When Should You Use Soft Wash Roof Cleaning?
Soft wash roof cleaning is recommended if:
- You notice green moss or dark streaks caused by algae.
- Your roof is located in shaded or damp areas where growth thrives.
- You have a delicate roof material like slate or clay tile.
- You want a safe, long-lasting cleaning method without risking damage.
In the UK, many homeowners benefit from scheduling roof cleaning every 3–5 years, depending on location and exposure to moisture.
How Much Does Soft Wash Roof Cleaning Cost in the UK?
One of the most common questions homeowners ask is: “How much does roof cleaning cost?”
While prices vary depending on roof size, material, and condition, soft wash cleaning in the UK typically ranges from £5 to £12 per square metre.
For an average semi-detached house, you can expect to pay around £400–£600, but large or heavily moss-covered roofs may cost more.
Remember, it’s not just about cost—soft washing helps prevent costly repairs down the line by protecting your roof’s integrity.
How Long Do Results Last?
Unlike traditional cleaning methods that may only clear away surface dirt, soft washing tackles the root cause of algae and moss. This means results can last 3 to 5 years, depending on local conditions.
To maintain results, many professional cleaners also apply a preventative treatment after the clean, which slows regrowth and keeps your roof looking better for longer.
Is Soft Wash Roof Cleaning Safe?
Yes—when carried out by professionals, soft wash roof cleaning is completely safe for both your home and the environment. The cleaning solutions are specifically designed for roof surfaces and are applied in controlled amounts. Experienced technicians also take measures to protect nearby plants, gutters, and property during the process.
Final Thoughts
Your roof is one of the most important parts of your home, and keeping it clean is essential for both appearance and longevity. Soft wash roof cleaning is the safest, most effective method for removing moss, algae, and lichen—without risking damage.
At Dunse Power Cleaning, we specialise in professional roof cleaning across Scotland, using advanced soft wash systems to deliver long-lasting results. Whether your roof needs a refresh or a full moss treatment, we’re here to help.
