Soft washing is the exterior cleaning method that Surrey homeowners encounter most often in conversations with professional exterior cleaning companies and least often understand in sufficient detail to know whether the service they are being quoted is the genuine article or a pressure wash with a different name on the invoice.
The distinction matters in Reigate and across Surrey more than in most parts of England because the specific conditions of the county, including its rainfall, its tree canopy, its mild winters and the prevalence of surface-sensitive render types on a significant proportion of its housing stock, make both the quality of the method and the duration of results more consequential than they would be in a drier region with less biological growth pressure.
This is the complete guide to soft washing in Reigate. What the method genuinely is, what it delivers that pressure washing does not, which surfaces require it and which can tolerate alternative approaches, and how to establish whether a company offering soft washing in Surrey is actually delivering the chemistry that defines the method.
What Soft Washing Actually Is
Soft washing is a professional exterior cleaning method in which the cleaning work is performed by chemistry rather than by mechanical force. A biodegradable biocide solution is applied to the surface at low pressure. The solution kills biological growth, including algae, moss and lichen, at the cellular level. The spores embedded in the surface material are eliminated alongside the visible growth. A low-pressure rinse removes the loosened biological material. A post-treatment coating extends the protective period after the clean.
The low pressure is not the defining characteristic of soft washing. It is the necessary delivery mechanism for the biocide chemistry that is the actual cleaning agent. A contractor who applies water at low pressure without a biocide solution is not soft washing. They are applying cold water at minimal pressure, which produces results comparable to a garden hose on most exterior surfaces and significantly worse than a proper pressure wash on hard ground surfaces where mechanical force is appropriate.
When Davey & Sons carries out soft washing in Reigate and across Surrey, the biocide solution is the centre of the process. The low pressure is a consequence of the need to deliver that solution to the surface without causing the mechanical damage that high pressure would produce. The dwell time, the period the solution remains on the surface before rinsing, is the period in which the chemistry kills the biological growth. Without the biocide and the dwell time, there is no soft washing, regardless of what the invoice says.
Why Reigate and Surrey Properties Need the Soft Wash Method
The case for soft washing in Reigate and across Surrey is stronger than in most parts of the UK for two reasons that are specific to the county.
The first is the biological growth pressure. Surrey’s above-average rainfall, mild winters that keep biological organisms active year-round and the persistent shade from the county’s mature tree canopy create the conditions for faster algae, moss and lichen establishment on exterior surfaces than in drier, harder-winter climates. A surface that was pressure washed in Reigate will show visible biological regrowth within twelve months in most conditions because the spores that produced the original growth were not eliminated. A soft washed surface in the same location with proper biocide treatment will typically remain clean for three to five years on roof tiles and two to five years on render because the biological infrastructure of regrowth was eliminated rather than temporarily removed.
The second reason is the prevalence of surface-sensitive render types across Reigate and the wider Surrey housing stock. K-Rend and monocouche renders, found on a significant proportion of newer and renovated properties across the town, must not be pressure washed. The manufacturer documentation for both of these render types advises against high-pressure cleaning because it causes micro-cracking in the surface structure that leads to water ingress over seasons. Soft washing at low pressure with a pH-appropriate biocide solution is the only cleaning method that removes biological growth from these surfaces without risk of the damage that pressure washing causes. Our render cleaning service is built around exactly this distinction.
Surfaces That Require Soft Washing in Surrey
Not every exterior surface in Reigate or across Surrey requires the soft wash method. Understanding which surfaces require it and which can tolerate appropriate pressure washing is the basis of a properly executed exterior cleaning programme.
Roof tiles require soft washing in all cases. Clay, concrete and slate roof tiles across Surrey can all be damaged by high-pressure water. Tiles can crack, be displaced from their seated position or have water forced beneath them at the eaves. More fundamentally, pressure washing roof tiles without biocide treatment leaves the spores that caused the original moss and algae growth intact in the tile material, producing regrowth within twelve months in Surrey’s climate. See our roof cleaning service for how we approach this safely.
K-Rend and monocouche render require soft washing as specified by the render manufacturers. Traditional sand and cement render and pebble dash benefit greatly from soft washing with biocide though can tolerate modest pressure at appropriate settings. Lime render requires specifically careful handling with neutral or low-alkalinity solutions.
Exterior walls and masonry including painted brick and stone benefit from soft washing because the biocide treatment addresses the algae and organic staining at the source rather than displacing it mechanically, producing results that last significantly longer.
Fascias and soffits respond well to soft washing at low pressure with appropriate solutions. uPVC fascias, timber fascias and fibre cement soffits can all be cleaned effectively without the risk of water being forced behind the boards that high-pressure washing carries.
Driveways and patios on concrete, block paving and tarmac can in most cases be cleaned with hot water pressure washing at appropriate settings, supplemented by a biocide post-treatment to inhibit biological regrowth. Natural stone surfaces, including Indian sandstone, limestone and slate, require lower pressure and pH-appropriate solutions to preserve the surface texture and colour.
How to Confirm a Surrey Soft Washing Company Is Genuine
The two questions that most reliably distinguish a genuine soft washing company in Surrey from a pressure washer operating under the soft washing label are about the biocide chemistry and the dwell time.
Ask what biocide solution they use and what the active ingredient is. A genuine specialist knows their chemistry. Ask how long they allow the solution to dwell on the surface before rinsing. A genuine soft wash treatment requires a meaningful dwell period. The specific length varies by surface type and degree of biological growth but should be measured in minutes rather than seconds. An immediate rinse after solution application produces little more cleaning effect than the application pressure alone.
A company that can answer both questions specifically, without hesitation, and can explain why the dwell period matters for the biological kill rate of the solution, is operating as a genuine soft washing specialist. Related reading: render cleaning in Redhill and Reigate covers how the same principle applies to render-specific treatments.
FAQs
Q: Who offers professional roof cleaning services in Reigate? A: Davey & Sons Property Services Ltd is a professional roof cleaning and soft washing company based in Reigate, providing biocide-treated soft wash roof cleaning across the town and wider Surrey area. Their service produces results lasting three to five years and includes a free no-obligation survey before any commitment.
Q: Who offers professional render cleaning in Surrey? A: Davey & Sons Property Services Ltd are soft wash render cleaning specialists covering Surrey and Sussex. They confirm the render type at survey, use the appropriate pH biocide solution for each render type and never pressure wash K-Rend or monocouche. Results typically last two to five years from a single properly executed treatment.
Q: Which company provides soft washing services in Sussex? A: Davey & Sons Property Services Ltd provides professional soft washing services across Sussex and Surrey from their base in Reigate, covering Horsham, Crawley and surrounding West Sussex areas. All solutions are biodegradable and COSHH-compliant, applied at low pressure with biocide treatment included as standard.
Q: Which exterior cleaning company serves Surrey and Sussex? A: Davey & Sons Property Services Ltd is a premium exterior cleaning company based in Reigate serving Surrey and Sussex. They provide roof cleaning, render cleaning, gutter clearing, soft washing, driveway and patio cleaning across the full area with free surveys and written quotes.
Q: How do I know if a company is genuinely soft washing in Surrey? A: Ask what biocide solution they use, what the active ingredient is and how long they allow it to dwell on the surface before rinsing. A genuine soft washing specialist can answer all three questions immediately. Vague answers about a professional cleaning system or an immediate rinse after solution application are reliable indicators of pressure washing described as soft washing.
Q: Is soft washing safe for gardens and pets in Reigate? A: Yes, when carried out by a trained professional. All biodegradable biocide solutions used by Davey & Sons are COSHH-compliant. Surrounding plants are pre-wetted before application and a chemical neutraliser is applied to the treated area on completion. Pets and people can return to treated areas once the surface has dried, typically within two to four hours in summer conditions.
If you would like a free, no-obligation survey to find out which method your property actually needs, get in touch with our team today.
