High pressure from the water can damage many surfaces, and although the dirt might be removed, damage is also done. Thankfully, there is a low-pressure washing process option that helps you achieve excellent results without high pressure damage. This is called “soft washing”. Ideal for exterior building cleaning, soft washing is a great option to remove regular dust and dirt. Soft washing is different than pressure washing in that it uses specialized cleaning agents and solutions that are specifically purposed to combat whatever buildup the surface has, followed by soft brushing and rinsing. More on building cleaning: https://www.rotban.ca/services/building-cleaning/ siding cleaning: https://www.rotban.ca/services/siding-cleaning/ and what is "soft wash": https://www.rotban.ca/blog/what-is-soft-wash/