Moss and Algae on Your Portland East Roof: Why It Keeps Coming Back and How to Stop It for Good

Walk down almost any block in Cully, Montavilla, Woodstock, or Lents on a winter afternoon, and you will see rooftops wearing shades of green. That green is not character. It is moss, and for Portland East homeowners it represents one of the most persistent threats to roofing longevity in the entire Pacific Northwest.