Roof & Exterior SoftWashing in Kent, Sussex, Surrey 5 Year Spot Free Warranty on Roofs

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What makes Purple Rhino different?


Purple Rhino SoftWash is devoted to providing its customers the highest level of quality, value, professionalism, and customer service.

We will treat you, your home, and your property with respect and as if it were our own. We will not rush to complete a job, or cut corners to save time. Purple Rhino prides itself on spending as much time as necessary to ensure that a high level of value is provided and your 100% level of satisfaction is achieved.

We’re a family-run business based in Ashford that has taken training courses around the world with the industry leaders and as a result, we are fully industry-standard accredited so you know you are going to get the best results.

Our Employees are Trained & Certified in Exterior Hard Surface Sanitising Procedures.

Our SoftWash equipment has always sanitised exterior surfaces whilst we clean your home or business. This is why we are so different from other exterior cleaning companies.

We provide safe, proven SoftWash methods, utilise professional-grade equipment, use exclusively low-pressure, safe roof & exterior cleaning SoftWash methods, and non-damaging, eco-friendly, bio-degradable cleaning solutions for your exterior home cleaning needs. We are trained specialists in the cleaning and treatment of roofs and sidings.

Don’t take our word for it, see what our customers say by reading our reviews.

The process of roof cleaning is inherently messy.


The moss, grime, dirt, and other debris are going to have to go somewhere.

The volume of moss and other debris which can be removed from a roof is often quite surprising. Removing a tonne of moss and other debris from a single house’s roof is not uncommon at all. Such a large volume cannot simply be left on the ground and mist be swept up and removed from the site. Any specialist exterior cleaning company will consider this as part of the job and leave the site tidy as a matter of course.

Does soft washing debris block drains?


No; the moss, grime, dirt, and other debris must be collected removed responsibly.

If moss and other debris removed from a roof were allowed to enter the storm drains or sewers then it would be quite possible for them to become blocked. A professional roof cleaning specialist will collect all the moss and debris and remove it from your home, possibly by enlisting the services of a third-party waste removal company. Hippo bags are a good option in many cases as they are relatively inexpensive to buy.

Various technologies and methods can be used to clean a roof; each has its own benefits and pitfalls.


Soft washing

Soft washing is a relatively gentle, low-pressure method that uses a chemical solution to kill and detach organic matter from a building’s exterior surfaces. It is widely considered to be a highly effective method of cleaning a roof without the need for technicians to stand on the roof as long as they can get within a few feet of the surface via a scaffold tower or mobile lifting platform. The low-pressure application of soft wash chemicals greatly reduces the likelihood of the roof incurring damage during the cleaning process or water ingress into the property. The soft washing process kills all organic matter and, provided it is undertaken by competent technicians, will leave treated areas spotless, sanitised, and last for a long time.

Soft Washing requires extensive training along with highly specialised equipment and chemicals to produce long-lasting, high-quality results. Access to the areas to be soft washed can be problematic in confined spaces as the solutions need to be sprayed from a few feet away rather than in close proximity to the surface.

Care must be taken to prevent soft wash solutions from entering drains or falling onto landscaped areas or gardens without immediate counter treatment to prevent



Scraping is a method of moss removal widely used to remove the most visible organic growth from a roof. In many cases, it can be undertaken from the ground with the aid of an extending pole system. A metal blade shaped to suit the roof’s tiles attached to a pole is used to scrape moss and other debris from the surface. It is an effective method of removing heavy moss growth and – provided the gutters are cleared immediately after scraping – can reduce the likelihood of gutters becoming blocked.

The equipment required is minimal and inexpensive and can be undertaken with little experience or training. Scraping a roof can give immediate visual results but these are often short-lived because the roots of the organic growth are not removed by this process. This can promote the regrowth of moss to a greater degree than before – similar to pruning a bush in the autumn to promote strong regrowth in the spring.

The process of scraping a roof can disturb tiles and pointing; particularly as it is often undertaken by unskilled individuals from quite a distance away, making it impossible to clearly see any issues or damage.


Pressure washing

Pressure washing can be a highly effective method of cleaning all kinds of surfaces and many homeowners will already have their own pressure washer for car washing etc., making them familiar with the principle. Water is projected under high pressure towards the surface in question in order to remove the dirt, moss, lichen, and other debris. Pressure washing can yield visually compelling results with little experience or expertise from the operator.

The use of high-pressure water to clean a roof carries the inherent risk of water ingress to the structure beneath. Water being forced ‘uphill’ on a roof will be forced beneath tiles and into the timber battens, felt, rafters and purlins. A greater risk associated with pressure washing is that the pressure is often so harsh that it can damage and crack roof tiles and remove vital mortar pointing.
Pressure washing can produce visually pleasing results but it is highly unlikely to remove all of the organic matter; causing faster and more prolific regrowth in a relatively short timeframe.


Steam Cleaning

Steam Cleaning can be used in some circumstances to clean roofs but it is more widely used by cleaning specialists to clean stonework and certain types of cladding. Specialist steam cleaning equipment, given the nature of steam at high pressure, can be extremely dangerous in untrained hands or if the equipment is poorly maintained.

High-pressure steam presents risks to the structure which are similar to those of pressure washing; high pressure and steam can remove mortar pointing, crack tiles and cause other damage, although it is more likely to kill all of the organic material and slow down regrowth.



Access to a roof for the purpose of cleaning should only be undertaken by trained individuals with the correct equipment. Roofs can be slippery and in most cases, it is illegal for operatives to stand upon a roof. The widely accepted best practice method of accessing a roof for the purpose of cleaning is via a mobile platform (also known as a ‘Cherry Pickers’) or with mobile scaffold towers.

Homeowners should make themselves aware of their liability in such circumstances and ensure any companies or individuals they enlist to clean their roof (or any other exterior surface) are adequately insured and has the correct equipment and training to do so.

Is soft washing safe for gardens and pets?


It is advisable to stay indoors and keep pets indoors during the soft washing process but as soon as the cleaning process is complete, everything can return to normal. Plenty of water, fertiliser, and a neutralising solution is applied to garden areas in the proximity of the clean and, in most cases, your garden will actually benefit from this treatment.

Do Roof Cleaners Climb And Stand On The Roofs?

No. In the UK, roof cleaners must never climb on pitched roofs. Doing so is proven to be particularly dangerous and exposes the roof surface to possible damage.

To avoid this, a Mobile Elevated Working Platform (MEWP) more commonly referred to as a ‘cherry picker’ or scaffold tower can be used. This allows technicians to safely work from above the roof, accessing all areas to ensure a comprehensive clean and treatment.

How long does it take to clean a Roof?

This depends on a few factors such as the cleaning method, the roof’s size and condition, access, weather conditions, and the amount of moss and debris to remove.

As an indication, a typical 3- or 4-bedroom detached house with moderate moss growth, straightforward access in favorable weather conditions should take no more than 1-2 days to complete when using the soft wash cleaning method.

Other methods such as scraping may be even quicker, provided the roof does not have any damage or incur any during the cleaning process.

Any exterior cleaning specialist should be able to provide a reliable estimate of the timeframe required after a brief visit to the site to conduct a survey.

Do you ever advise against roof cleaning?

Yes. Surprisingly often.

Particularly where a roof has been left for too long before being cleaned and the organic growth has compromised the structural integrity of the roof’s tiles and potentially damaged the structure beneath. In such instances, the only option to the homeowner is to enlist the services of a roofing contractor to repair or replace the entire roof.

An experienced specialist exterior cleaning company will only undertake a project if they are confident their work will make an improvement to the appearance and/or lifespan of the area to be cleaned and treated. If a surveyor believes the roof cannot be adequately cleaned and treated, they should advise the homeowner of the best course of action to take, even if it really isn’t the news the homeowner wants to hear.

Probably not

Providing we can get clear safe access to all points of the property and a water supply, you can leave us to get on with it so you could go to work, do the school run or do a bit of shopping and return to a clean environment.

How Much Does Roof Cleaning Cost?

When calculating the price to soft wash a roof, we have to consider numerous factors to arrive at the figure.

Firstly, the size of the roof. A larger roof will take longer to clean than one that is half its size in comparable circumstances.

Secondly, the level of infestation. A roof that is infested with moss will require more effort to clean than one which has less moss to remove. Disposal of large quantities of moss from the property will inevitably add to the price.

Thirdly, access. Can our technicians achieve adequate access to all areas of the roof to clean it thoroughly? Properties with plenty of surrounding space for our access equipment will require less time to complete, resulting in a lower price.

Fourthly, the specialist equipment, ongoing staff training, specialist cleaning solutions, and insurances required to provide a service that is far above and beyond the expectations of even the most discerning customers.

Your quotation takes all of these factors into consideration, as well as our unique ability to offer a fully-underwritten 5-year warranty in most cases.

As an example, a small 2-bedroom bungalow with adequate access and a low moss infestation could be from £1,500 whereas heavy moss infestation and poor access cost easily double the price. A large 5-bedroom detached house could be £4,000 upwards.

In summary; the key factors affecting price are size, roof type, ease of access and location, and level of infestation.

Our mission; ‘To provide the most phenomenal service experience ever’ is more than just a few buzzwords; it’s our mindset. Our ethos. We’re thrilled every time a customer leaves us a 5-star review on Google, but also ask ourselves how we could improve upon it.

Yes, we can.

Purple Rhino SoftWash understands that certain cleaning needs may apply, such as touching up only the front visible roof to increase the curb appeal for a home for sale.  But it is highly recommended to avoid a partial cleaning and treatment.

Any un-treated sections most likely already have bacteria and algae spores you cannot see. These spores will travel to the treated roof sections and expedite contamination and re-growth. Therefore we do not offer the 5-year “spot free” limited warranty on partial cleanings and treatments.

Incidentally, our 5-year “spot free” limited warranty is transferable if a home is sold.

We request payment made in full upon completion of work.

We accept bank payment, Visa, and Master Card.


Purple Rhino SoftWash employees have completed certification training through SoftWash Systems, attended SoftWash hands-on seminars, and attend yearly SoftWash training events to stay current on all techniques, methods, and SoftWash application methods.  Purple Rhino SoftWash carries a £1 Million Commercial Liability Policy for your added protection and peace of mind.


Our SoftWash process provides fantastic results on vinyl siding, hardy siding, painted surfaces, playgrounds, pool decks, pavements, canopy tents, and just about all other exterior surfaces. SoftWash cleans and brightens without the abrasive damage of a pressure washer!

So please give us a call to discuss other exterior surfaces.


Our Safe Roof & Exterior Cleaning SoftWash System’s proven process and cleaning solutions are guaranteed to remove ugly black streaks from your roof on the day of cleaning and treatment. Purple Rhino’s Soft Wash process kills 100% of bacteria, algae, moss, and lichen.

Our 3-in-1 safe roof and exterior cleaning process cleans the roof and inhibits regrowth. We are so confident in our process and methods that we provide a “Spot Free” 5-year limited warranty with every complete roof cleaning.

Can soft washing chemicals damage the paintwork on my car?

Some of the chemicals used in the soft washing process may be harmful to vehicle paintwork. Alternatively, it may be viable to create a barrier or cover with plastic sheeting to prevent debris from falling on to vehicles or other items and divert it to a convenient location for disposal.

Do Roof Cleaners Climb And Stand On The Roofs?

No. In the UK, roof cleaners must never climb on pitched roofs. Doing so is proven to be particularly dangerous and exposes the roof surface to possible damage.

To avoid this, a Mobile Elevated Working Platform (MEWP) more commonly referred to as a ‘cherry picker’ or scaffold tower can be used. This allows technicians to safely work from above the roof, accessing all areas to ensure a comprehensive clean and treatment.

Soft washing is far gentler on masony, roofing materials and exterior finishes

A professional soft wash cleaning system is designed to apply cleaning solutions at 45 -50 psi, from about 6 feet away. That’s similar garden hose or a hard rainfall.

Soft washing equipment is so-called because it washes softly. Yet very effectively.

We use Softwash Systems’ Cleaning and Treatment Process

All Purple Rhino SoftWash technicians are trained to use the premier SoftWash Systems cleaning and treatment process, involving the use of professional grade, low-pressure applications of the proprietary SoftWash Systems Cleaning Solution.

Each exterior surface to be treated is analysed to determine the best course of treatment.

We will not use a pressure washer around your property.


Untreated roofs may lose up to 50% of the expected roof shingle life cycle. The black streaks (bacteria) are eating the limestone in the shingle and causing erosion. Roof bacteria, moss, lichen and algae all cause granular loss from shingles. The bacteria weaken the shingle, the fibre root systems moss and lichen cause discoloration, and can cause small cracks in shingles. The resulting damage will lesson the life cycle of the roof. Granular loss also reduces reflection of the suns UV rays and protection from the elements.

The earlier your roof is cleaned and treated the better!

Soft washing completely removes bacteria, algae, moss and lichen from your roof which can extend its lifespan.

While other methods of roof cleaning may be cheaper, they are unable to remove 100% of this organic matter; giving long-lasting results. This is why Purple Rhino chose soft washing as our primary cleaning method.

Spot free warranties for roofs lasts for 5 years and can be transferred to a new owner if you sell your home.

Work throughout Kent, Sussex, Surrey and London, offering our expert exterior cleaning services in and around Dover, Swale, Canterbury, Deal, Bapchild, Bobbing, Adisham, Sandwich, Borden, Barham, Walmer, Boughton-under-Blean, Bekesbourne-with-Patrixbourne, Alkham, Bredgar, Bishopsbourne, Ash, Conyer, Blean, Ashley, Danaway, Bridge, Aycliff, Doddington, Chartham, Aylesham, Dunkirk, Chestfield, Barfrestone, Eastchurch, Chislet, Barnsole, Eastling, Fordwich, Betteshanger, Faversham, Hackington, Buckland, Goodnestone, Harbledown and Rough Common, Buttsole, Graveney, Herne and Broomfield, Capel-le-Ferne, Hartlip, Hoath, Chillenden, Hernhill, Ickham, Whitfield, Iwade, Kingston, Coldred, Leysdown, Littlebourne, Coombe, Lower Halstow, Lower Hardres and Nackington, Denton, Lynsted, Petham, Drellingore-East, Kemsley, Sturry, Langdon, Milstead, Thanington Without, Eastry, Milton Regis, Upper Hardres, East-Studdal, Minster-on-Sea, Waltham, Elmstone, Murston, Westbere, Elvington, Newington, Wickhambreaux, Ewell, Newnham, Womenswold, Eythorne, Norton, Buckland and Stone, Swalecliffe, Farthingloe, Oare, Finglesham, Ospringe, Frogham, Rodmersham, Kingsdown, Rushenden, Knowlton, Selling, Langdon, Lydden, Marley, Nonington, Northbourne, Preston-next-Wingham, Richborough, Ringwould, Shepherdswell, Sholden, Snowdown, St Margaret’s at Cliffe, Staple, Stourmouth, Sutton, Swingate, Temple Ewell, Tilmanstone, Waldershare, Ware, West Langdon, West Studdal, Westcliffe, Westmarsh, Whitfield, Wingham, Woodnesborough, Wootton, Worth, Swale District, Bapchild, Bobbing, Borden, Boughton-under-Blean, Bredgar, Conyer, Danaway, Doddington, Dunkirk, Eastchurch, Eastling, Faversham, Goodnestone, Graveney, Hartlip, Hernhill, Iwade, Leysdown, Lower Halstow, Lynsted, Kemsley, Milstead, Milton Regis, Minster-on-Sea, Murston, Newington, Newnham, Norton, Buckland and Stone, Oare, Ospringe, Rodmersham, Rushenden, Selling, Canterbury, Adisham
Barham, Bekesbourne-with-Patrixbourne, Bishopsbourne, Blean, Bridge, Chartham, Chestfield, Chislet, Fordwich Hackington, Harbledown and Rough Common, Herne and Broomfield, Hoath, Ickham, Kingston, Littlebourne, Lower Hardres and Nackington, Petham, Sturry, Thanington Without, Upper Hardres, Waltham, Westbere, Wickhambreaux, Womenswold, Swalecliffe

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Your buildings will
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