Pressure washing relies mainly on water impact. Soft washing generally uses lower pressure with a treatment selected for the contamination and material. A professional may combine stages, so the meaningful question is not which label wins but what method protects the actual surface.
Where controlled pressure can help
Suitable hard paving may respond well to pressure washing when the machine, nozzle, distance and technique match the material. Too much force can mark timber, damage pointing, strip coatings, disturb jointing sand or expose aggregate.
Where a softer method may help
Rendered walls, roofs and other delicate finishes may require a lower-pressure approach. Any treatment needs correct selection, dwell time, containment and protection for people, plants, pets, metals and drainage. “Soft” does not mean harmless.
Ask for a surface-specific plan
Send close-ups and wide photographs, identify stains and previous coatings, and mention cracks, loose pointing or leaks. Confirm water access, runoff, plant protection, re-sanding, treatment, cleanup and realistic limits on stain removal. Roof work also needs an appropriate safe-access plan.
See LP10 exterior-cleaning services or request a surface assessment.
Match the method to material and contamination
Identify the substrate, its condition, any coating and the stain before selecting pressure, treatment or a combined process. Sound concrete paving and delicate painted render do not tolerate the same approach. Organic growth, atmospheric dirt, oil, rust and efflorescence are different problems; no single wash removes all of them safely. Set an agreed test area and acceptable finish, especially where the surface is old, patchy or already damaged.
Protection and follow-on work
Loose pointing, failed sealant, open vents and hidden leaks can allow water where it should not go. High pressure may disturb jointing sand or weak coatings, while cleaning agents can affect plants, metals, glass, pets and drainage if poorly selected or controlled. Ask how runoff is contained and whether nearby doors, sockets, cameras and neighbour property are protected. Paving may need re-sanding after cleaning; some surfaces need ample drying before a separately specified sealer. Roofs and upper storeys require a safe-access method rather than working casually from ladders.
Questions for the exterior-cleaning proposal
- What material and contamination have you identified?
- What test area, pressure, treatment and dwell or rinse method is proposed?
- How will plants, drainage, metals, glazing and adjoining property be protected?
- Are access equipment, water, runoff control and cleanup included?
- Will jointing, seals, coatings or sand need reinstating afterwards?
- Which stains or historic damage may remain after a safe clean?
A roofer should repair defective coverings or flashings before cleaning, and a drainage provider may be needed for blocked rainwater systems. A paving contractor can address loose joints, settlement and sealing; a decorator or render specialist should assess failed coatings. Scaffolding may be needed where sustained access or edge protection is required.
Use the LP10 exterior-cleaning hub, then request a cleaning quote with close photographs of the surface and staining.