Soft washing and pressure washing are two popular methods for cleaning the exterior of buildings and other surfaces. While both methods use water to clean, they differ in the type of equipment and techniques used, as well as the types of surfaces and dirt they are best suited for. Here is a detailed comparison of soft washing and pressure washing:
Equipment
Soft washing uses specialized low-pressure pumps and equipment to apply a mixture of water and cleaning solution to the surface being cleaned. The cleaning solution is typically a biodegradable detergent that is applied at low pressure (around 500-800 psi).
On the other hand, pressure washing uses high-pressure pumps and equipment to blast water at the surface being cleaned. The water pressure can range from 1,000-4,000 psi, depending on the type of surface and dirt being cleaned.
Techniques
The main difference between soft washing and pressure washing is the technique used to apply water and cleaning solution to the surface.
In soft washing, the cleaning solution is applied evenly to the surface using a low-pressure spray. The solution is allowed to dwell on the surface for a few minutes to loosen and dissolve dirt and grime. After the solution has had time to work, it is rinsed off with low-pressure water.
In pressure washing, high-pressure water is used to blast dirt and grime off the surface. The water pressure is powerful enough to remove tough dirt and stains, but it can also damage delicate surfaces and strip paint if used improperly.
Suitability
Soft washing is suitable for a wide range of surfaces, including roofs, siding, decks, and patios. It is especially effective at removing algae, mildew, and other types of biological growth that can grow on surfaces over time. Because it uses low pressure and a cleaning solution, soft washing is less likely to damage delicate surfaces or strip paint.
Pressure washing is suitable for surfaces that can withstand high pressure, such as concrete driveways and sidewalks. It is effective at removing tough dirt and stains, such as oil and grease, but it can damage softer surfaces like wood and brick if used improperly.
Pros and Cons
Both soft washing and pressure washing have their pros and cons. Here are some of the main advantages and disadvantages of each method:
Soft washing
Pros:
- Less likely to damage delicate surfaces
- Effective at removing algae and mildew
- Uses a biodegradable cleaning solution
- Can be used on a wide range of surfaces
Cons:
- May not be as effective at removing tough dirt and stains
- May require multiple passes to fully clean the surface
Pressure washing
Pros:
- Effective at removing tough dirt and stains
- Can clean surfaces quickly
- Can be used on a wide range of surfaces
Cons:
- Can damage delicate surfaces and strip paint if used improperly
- Can cause erosion if used on slopes
- Can create a mess if not used properly
Conclusion
Soft washing and pressure washing are both effective methods for cleaning the exterior of buildings and other surfaces. The choice between the two methods depends on the type of surface being cleaned and the type of dirt and stains that need to be removed. Soft washing is generally safer and less likely to damage delicate surfaces, but it may not be as effective at removing tough dirt and stains. Pressure washing is more powerful and effective at removing tough dirt and stains, but it can damage softer surfaces if used improperly.
