Soft Washing Exeter
Safe, low-pressure cleaning for render, roofs & delicate surfaces | From £100
Soft washing is the professional's choice for surfaces that cannot withstand high-pressure cleaning. Not every exterior surface can handle 3,000 PSI of water pressure - and using the wrong method on the wrong surface leads to cracking, water ingress, stripped coatings, and costly repairs.
Paul uses a low-pressure application system combined with specialist biocide solutions that kill algae, moss, and lichen at the root. Rather than blasting growth off the surface where it returns within weeks, our soft wash approach eliminates the organism entirely - giving results that last 3-5 times longer than pressure washing alone.
With 47 five-star Google reviews and years of experience cleaning properties across Exeter and Devon, Owens Exterior Cleaning is the trusted choice for homeowners who want their property cleaned properly - without the risk of damage.
What is Soft Washing?
The science behind longer-lasting exterior cleaning results
Soft washing is a cleaning technique that uses low-pressure water - equivalent to a standard garden hose at just 60-100 PSI - combined with professional-grade cleaning solutions to remove algae, moss, lichen, mould, and other organic growth from exterior surfaces. The cleaning solutions do the hard work, not the water pressure.
The key difference between soft washing and traditional pressure washing is in how the cleaning is achieved. Pressure washing relies on brute force - high-pressure water jets at 1,500-3,000 PSI that blast contaminants off the surface. Soft washing relies on chemistry - specialist biocide solutions that break down and kill organic growth at a cellular level, including the root systems and spores that you cannot see.
This is why soft washing results last 3-5 times longer. Pressure washing removes what you can see on the surface, but the roots and spores remain embedded in the material and regrow quickly. Soft washing kills the organism entirely, meaning it takes significantly longer to re-establish.
Low Pressure, High Results
Operating at just 60-100 PSI (garden hose equivalent), there is zero risk of surface damage, water ingress, or stripping protective coatings from your render or roof tiles.
Kills Growth at the Root
Our biocide solutions penetrate into the surface material to kill algae, moss, and lichen at the root - not just the visible growth on top. This eliminates the problem at its source.
Results Last 3-5x Longer
Because we treat the spores and root systems that cause regrowth, soft washing delivers results that last 12-24 months compared to 3-6 months from pressure washing alone.
Prevents Regrowth
Our post-treatment biocide barrier creates an inhospitable environment for new organic growth, actively preventing algae and moss from re-establishing on treated surfaces.
SPA Approved Methods
We use Softwash Professionals Association (SPA) approved methods and products, ensuring every job meets the highest industry standards for safety and effectiveness.
Surfaces We Soft Wash
Expert soft wash cleaning for every delicate exterior surface across Exeter and Devon
K-Rend & Monocouche Render
The most common render types on Exeter new builds. Soft washing is the manufacturer-recommended cleaning method - the only safe way to clean without damaging the through-coloured finish or stripping protective coatings.
Silicone & Acrylic Render
These flexible, water-repellent render systems require a gentle approach. High pressure damages the acrylic surface and strips the silicone's hydrophobic properties. Our soft wash preserves these qualities while removing all organic growth.
Roof Tiles - Slate, Concrete, Clay
Pressure washing cracks tiles, strips coatings, and forces water into the roof space. Our soft wash biocide kills moss and algae at the root, with dead growth washing away naturally in the rain over the following weeks.
Conservatory Roofs
Both polycarbonate and glass conservatory roofs are easily scratched and damaged by pressure washing. Our soft wash removes green algae and moss safely, restoring light transmission without any risk to the panels or seals.
Wooden Fences, Decking & Pergolas
High-pressure water splinters wood fibres, raises the grain, and can strip stain and preservative. Soft washing cleans timber gently and the biocide kills the algae that causes slippery, green surfaces on decking.
Painted Masonry & Pebbledash
Paint coatings and pebbledash aggregate are easily damaged by high pressure. Soft washing removes dirt and biological growth without stripping paint, dislodging pebbles, or forcing water into the wall structure.
UPVC Cladding, Fascias & Soffits
UPVC discolours and becomes brittle with age. High-pressure cleaning can crack old UPVC and force water behind the boards. Our gentle soft wash restores UPVC to its original white without any risk of damage.
Delicate Natural Stone
Soft natural stones like limestone, sandstone, and Bath stone are porous and easily etched or eroded by high pressure. Soft washing cleans these materials safely, preserving their natural character and preventing accelerated weathering.
Not sure which method your surface needs? If you are unsure whether your property needs soft washing or pressure washing, Paul will assess the surface type during a free, no-obligation survey and recommend the correct approach. Many properties benefit from a combination of both methods - soft washing for render and roofing, pressure washing for driveways and hard surfaces.
Soft Washing vs Pressure Washing - Which Do You Need?
Understanding the difference could save your property from costly damage
| Factor | Soft Washing | Pressure Washing |
|---|---|---|
| Pressure | Low (60-100 PSI) | High (1,500-3,000 PSI) |
| Best for | Render, roofs, delicate surfaces | Driveways, patios, concrete |
| Results last | 12-24 months | 3-6 months |
| Surface damage risk | Minimal | Higher on delicate surfaces |
| Cost | Slightly higher | Standard |
| Process time | Longer (dwell time needed) | Faster |
Bottom line: If your surface is render, roofing, timber, UPVC, or any painted or delicate material, soft washing is the only safe method. For hard surfaces like concrete, block paving, and natural stone paving, pressure washing is more appropriate. Many properties need both - and we offer both services.
Our Soft Washing Process
A proven 7-step process that delivers safe, long-lasting results every time
Survey & Assessment
Every job starts with a thorough survey. Paul identifies the surface type, assesses the level and type of contamination (algae, moss, lichen, atmospheric staining), and checks for any pre-existing damage that needs attention. This determines the correct cleaning solution, concentration, and method for your specific surface. The survey is free, and you receive an honest, no-obligation quote on the spot.
Protection
Before any cleaning solution is applied, we protect all vulnerable areas. Plants, flower beds, and lawns are covered with protective sheeting and pre-soaked with clean water. Letterboxes, door seals, and any open vents are sealed. Window frames and trim are protected where necessary. We take this step seriously - your property and garden are treated with the same care we would give our own.
Pre-Treatment
We apply our professional-grade biocide solution to the entire surface using low-pressure spray equipment. The solution is specifically selected for the surface type and contamination present - different renders, roof tiles, and timber each require different formulations. The biocide begins working immediately on contact, breaking down organic growth at a cellular level and penetrating deep into the surface to reach root systems and spores.
Dwell Time
This is the critical step that many cheaper operators skip. The biocide solution needs 30-60 minutes of dwell time (sometimes longer for heavy contamination) to fully penetrate and kill organic growth at the root. Rushing this stage means the solution only kills surface growth, and you lose the long-lasting results that make soft washing worth the investment. We always allow the full dwell time - it is the foundation of a proper soft wash.
Low-Pressure Rinse
Once the biocide has done its work, we gently rinse the surface with low-pressure water to wash away all dead organic matter, dirt, and residue. Operating at just 60-100 PSI, this is equivalent to a garden hose and poses zero risk of damage to even the most delicate surfaces. The rinse reveals the clean surface beneath, and for most jobs, the transformation is dramatic and immediate.
Post-Treatment
After the surface is clean and rinsed, we apply a biocide barrier treatment. This final application creates an inhospitable environment for algae, moss, and lichen, actively preventing regrowth for 12-18 months beyond the initial clean. This step is what separates a professional soft wash from a basic clean - it delivers genuine long-term protection and makes the investment worthwhile.
Final Inspection
We walk the property with you to check every area has been cleaned to your satisfaction. We remove all protective coverings, rinse surrounding areas clean, and leave your property tidy. If there is any area you are not completely happy with, we address it before we leave. We also provide aftercare advice and let you know when we would recommend rebooking to maintain results.
Soft Washing Prices in Exeter
Transparent, competitive pricing for all soft washing services
Conservatory Roof
Polycarbonate or glass
From £100
Fence / Decking
Per panel or per m²
From £3/panel
Render (Per Elevation)
Single wall / side
From £150
Full House Render
All elevations
From £400
Roof Cleaning
Soft wash & biocide treatment
From £300
UPVC Cladding / Fascias
Cladding, soffits & fascias
From £80
Pricing note: All prices include biocide pre-treatment, soft wash clean, and post-treatment barrier application. Final pricing depends on surface area, access requirements, and level of contamination. We provide free, no-obligation quotes for all jobs - the price we quote is the price you pay, with no hidden extras. Get your free quote today.
Why Soft Washing in Devon Makes Sense
Devon's unique climate makes biocide treatment essential for lasting results
Devon receives approximately 30% more rainfall than the UK average, and Exeter's maritime climate means high humidity levels year-round. These conditions create the perfect environment for rapid algae, moss, and lichen growth on exterior surfaces. If you have ever noticed how quickly green growth returns to your render, roof, or fencing after cleaning, Devon's climate is the reason.
Traditional pressure washing in Devon's wet climate means regrowth can appear within just a few months. The roots and spores are left behind in the surface, and Devon's constant moisture gives them everything they need to re-establish quickly. You end up in a cycle of cleaning every few months with diminishing returns.
Soft washing with biocide treatment breaks this cycle. By killing growth at the root and applying a protective barrier, you get 12-24 months of clean results instead of 3-6 months. For Devon homeowners, this is not just a better clean - it is a fundamentally smarter approach to maintaining your property in one of the wettest regions of England.
30% More Rainfall Than UK Average
Devon's higher-than-average rainfall keeps surfaces damp for longer, creating ideal conditions for algae and moss to thrive. Surfaces that would stay clean for months in drier parts of the country need ongoing protection in Devon.
Maritime Humidity
Exeter's proximity to the coast means high humidity year-round, even during drier months. This constant moisture in the air promotes rapid organic growth on all exterior surfaces.
Quick Regrowth Without Treatment
Traditional pressure washing in Devon's climate means regrowth within months. Without biocide treatment, you are simply removing the visible symptoms while leaving the cause untreated.
Biocide Provides Lasting Protection
Our biocide barrier treatment actively prevents regrowth, giving you 12-24 months of protection against Devon's damp conditions - a genuine long-term solution rather than a short-term fix.
Rendered Properties Are Everywhere
Exeter new build developments in Pinhoe, Cranbrook, and across Devon use K-Rend and monocouche render as standard. These surfaces specifically require soft washing - making this service essential for a large proportion of Devon homeowners.
Soft Washing Across Exeter & Devon
We provide professional soft washing across Exeter and the surrounding area including:
Free quotes for all locations listed above with no travel charges. Don't see your area? Call us - we cover all of Devon and are happy to discuss your project wherever you are based.
View our full list of services or get in touch for a free quote.
Frequently Asked Questions
Everything you need to know about soft washing in Exeter
Is soft washing safe for K-Rend?
Yes, absolutely. Soft washing is the manufacturer-recommended cleaning method for K-Rend and all silicone-based render systems. Unlike pressure washing, which operates at 2,000-3,000 PSI and can strip protective coatings, crack the surface, and force water behind the render, soft washing uses just 60-100 PSI - equivalent to a garden hose. The cleaning solutions do the work, not the water pressure. Paul has cleaned hundreds of K-Rend properties across Exeter and Devon without a single case of damage. It is the only method we would ever use on rendered surfaces.
How long do soft washing results last?
Soft washing results typically last 12-24 months, which is 3-5 times longer than a standard pressure wash. The reason is simple: pressure washing only removes visible growth from the surface, while our biocide solutions kill algae, moss, and lichen at the root - including the spores you cannot see. We also apply a post-treatment biocide barrier that actively inhibits regrowth. In Devon's wet climate, this extended protection is particularly valuable. Some of our clients in sheltered or north-facing locations opt for an annual biocide retreatment to keep surfaces looking pristine year-round.
Will the chemicals damage my plants?
We take great care to protect your garden and landscaping. Before any soft washing begins, we cover nearby plants, flower beds, and grass with protective sheeting. The biocide solutions we use are biodegradable and break down quickly in the environment. We also pre-wet surrounding vegetation with clean water before application, which creates a protective barrier. After the job, we rinse any areas that may have been exposed. In our experience, plant damage from soft washing is extremely rare when proper precautions are followed - and we always follow them.
Can you soft wash in winter?
Yes, soft washing can be carried out year-round. The biocide solutions we use are effective regardless of temperature and actually benefit from Devon's damp winter conditions, as moisture helps the solution penetrate deeper into organic growth. However, we avoid working in heavy rain as it can dilute the solution before it has had time to work, and we will not work on roofs in icy or frosty conditions for safety reasons. Winter is actually an excellent time to treat surfaces because algae and moss growth slows during the colder months, giving the biocide more time to work before the growing season returns in spring.
How long does soft washing take?
The time required depends on the surface type and the level of contamination. A single elevation of render typically takes 2-3 hours including dwell time. A full house render clean usually takes a full day. Conservatory roofs take 2-4 hours. Fence and decking jobs vary by size but most are completed within half a day. The dwell time - the period where the biocide solution is left to work on the surface - is a critical part of the process and cannot be rushed. We always allow sufficient dwell time to ensure the solution kills growth at the root for the longest-lasting results.
What's the difference between soft washing and pressure washing?
The key difference is in how the cleaning is achieved. Pressure washing relies on high-pressure water (1,500-3,000 PSI) to blast dirt, algae, and moss off surfaces using force. Soft washing uses low pressure (60-100 PSI) combined with specialist biocide cleaning solutions that chemically break down and kill organic growth. Pressure washing is ideal for hard surfaces like driveways, patios, and concrete that can withstand the force. Soft washing is essential for delicate surfaces like render, roof tiles, conservatory roofs, and painted surfaces that would be damaged by high pressure. Soft washing also delivers longer-lasting results because it kills growth at the root rather than just removing what is visible on the surface.
Related Services
Explore our full range of professional exterior cleaning services in Exeter
Render Cleaning
K-Rend, monocouche & silicone render specialists. Soft wash cleaning from £150.
Roof Cleaning
Moss & algae removal for slate, tile & flat roofs. Soft wash method from £200.
Pressure Washing
High-pressure cleaning for driveways, patios & hard surfaces. From £3/m².
Gutter Cleaning
Professional gutter clearing and exterior cleaning. Prevent blockages and overflow damage.
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