Why North Facing Siding Turns Green: Causes and Fixes
North-facing siding turns green because limited direct sunlight leaves the wall cooler and wet for longer, allowing algae to colonize its surface. Moss, mildew, and some molds can join the growth when moisture persists, but green discoloration can also come from copper runoff, dirt, or mineral staining rather than biology. Key Facts at a Glance […]