What Causes Roof Stains on San Diego Homes?
Algae, mold, mildew, moss, and lichen can contribute to visible roof staining where moisture and shade support growth. Patterns may be stronger below trees, on slower-drying slopes, near valleys, or where runoff concentrates. Appearance alone does not confirm the exact organism, so a property review matters. Dust and airborne residue Inland dust, coastal salt, pollen, […]