Pressure Washing vs Softwashing: Which Is Right for Your Property?
When it comes to exterior cleaning, one of the most common questions we hear is: "Should I use pressure washing or softwashing?" The answer depends entirely on what surface you're cleaning and what result you need.
After 20+ years of cleaning properties across London and Surrey, here's our professional breakdown.
What Is Pressure Washing?
Pressure washing uses high-pressure water — typically between 2,000 and 4,000 PSI — to blast away dirt, grime, oil stains and biological growth from hard surfaces. It's the brute-force approach to cleaning.
Best For:
- Driveways (block paving, concrete, tarmac)
- Patios (flagstones, natural stone, concrete slabs)
- Garage floors and workshop areas
- Heavily soiled commercial surfaces
What Is Softwashing?
Softwashing uses low-pressure water combined with specialist cleaning solutions to kill biological growth (moss, algae, lichen, mould) at the cellular level. The chemicals do the work, not the pressure.
Best For:
- Roof tiles (concrete, clay, slate)
- Rendered walls and painted surfaces
- UPVC cladding and fascias
- Conservatory roofs
- Timber fences and decking
Key Differences at a Glance
Pressure: Pressure washing operates at 2,000–4,000 PSI; softwashing at just 100–500 PSI.
Method: Pressure washing relies on mechanical force; softwashing uses chemical treatment.
Surface risk: Pressure washing can damage delicate surfaces; softwashing is safe for virtually all materials.
Longevity: Pressure washing removes surface growth; softwashing kills organisms at the root, providing longer-lasting results.
The Biggest Mistake Homeowners Make
Using a pressure washer on roof tiles. We see the damage regularly — cracked tiles, stripped surface coatings, water forced underneath tiles causing interior damp. Roof tiles should never be pressure washed. Always use a soft wash system.
Similarly, pressure washing render or painted surfaces strips the finish and can force water into the wall structure, causing damp and mould problems that far exceed the original cleaning issue.
Our Approach
At Moss Men, we use both methods depending on the job. Many projects involve a combination — for example, softwashing the roof and fascias while pressure washing the driveway and patio in the same visit. This gives you the best results across all surfaces.
Not Sure Which You Need?
We provide free assessments across London and Surrey. We'll inspect your property and recommend the right approach for each surface — no pressure, no obligation.
Get your free quote today or call 0800 654 6701.