Spilman,inc., the Best Value in Residential Roof Replacement for 25years in NC, VA, FL & (NY state from 1985-1995) is power washing this Roof w/medium light pressure & environmentally safe treatment. This is not as simple as hiring your landscaper 0r ‘handyman’ to spray some bleach on, wait 30 mins-or Not, and power wash it Off! Too many roofs are being compromised by granule loss & damage from High pressure &/0r harsh bleaching by inexperienced labor, just trying to make a couple hundred bucks.