A softwash or non pressure roof cleaning is a low pressure chemical roof cleaning. Most traditional pressure cleanings use up to 4,000 psi when cleaning a roof, which can take away the color of a roof tile, or even cause cracks in the tiles. Worst case scenario it can cause a leak. With a softwash roof cleaning you are letting the chemical solution (approved by roofing manufacturers) eat away at all the organic growth on your roof while whilst only using 35 psi. A softwash roof cleaning will last longer than a traditional pressure cleaning without all the potential damaging factors.